diff --git a/BP1.kicad_sch b/BP1.kicad_sch
new file mode 100644
index 0000000..c0a611d
--- /dev/null
+++ b/BP1.kicad_sch
@@ -0,0 +1,1158 @@
+(kicad_sch
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+		(title "EL223FP4L1")
+		(date "2025-05-08")
+		(rev "1")
+		(company "Boles & Walker")
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diff --git a/LP.kicad_sch b/LP.kicad_sch
index 1532f7e..cbd7e4f 100644
--- a/LP.kicad_sch
+++ b/LP.kicad_sch
@@ -3,7 +3,14 @@
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 	(generator_version "9.0")
 	(uuid "a18ea684-61c3-4005-a50b-6f721c53937e")
-	(paper "A4")
+	(paper "USLetter")
+	(title_block
+		(title "EL223FP4L1")
+		(date "2025-05-08")
+		(rev "1")
+		(company "Boles & Walker")
+		(comment 1 "Low Pass Filter (<1k)")
+	)
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 		(symbol "Amplifier_Operational:MCP6004"
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@@ -709,20 +716,20 @@
 		)
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diff --git a/audio_gain.kicad_sch b/audio_gain.kicad_sch
index 7c5004d..b25b965 100644
--- a/audio_gain.kicad_sch
+++ b/audio_gain.kicad_sch
@@ -3,7 +3,13 @@
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 	(generator_version "9.0")
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-	(paper "A4")
+	(paper "USLetter")
+	(title_block
+		(title "EL223FP4L1")
+		(date "2025-05-08")
+		(rev "1")
+		(company "Boles & Walker")
+	)
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@@ -974,7 +980,7 @@
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@@ -987,14 +993,14 @@
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 		)
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 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396/1f3891d7-9ed5-413e-b758-2e8f45955b50"
-					(reference "U7")
-					(unit 3)
+					(reference "U4")
+					(unit 1)
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 		(fields_autoplaced yes)
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diff --git a/ece223_project.kicad_pro b/ece223_project.kicad_pro
index 8ae0d71..cd06a91 100644
--- a/ece223_project.kicad_pro
+++ b/ece223_project.kicad_pro
@@ -603,7 +603,7 @@
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       "workbook_filename": "ece223_project.wbk"
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     [
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diff --git a/ece223_project.kicad_sch b/ece223_project.kicad_sch
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@@ -722,6 +729,189 @@
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@@ -2376,9 +2968,75 @@
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@@ -2388,7 +3046,7 @@
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@@ -2487,26 +3145,25 @@
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-		(at 29.21 25.4 0)
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+		(lib_id "Amplifier_Operational:MCP6004")
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-		(uuid "124fa24c-509e-4da6-acf9-03cfae52bc08")
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-		(property "Value" "PWR_FLAG"
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+		(property "Value" "MCP6004"
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@@ -2514,7 +3171,7 @@
 			)
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@@ -2522,8 +3179,8 @@
 				(hide yes)
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+		(property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/21733j.pdf"
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@@ -2531,8 +3188,149 @@
 				(hide yes)
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-		(property "Description" "Special symbol for telling ERC where power comes from"
-			(at 29.21 25.4 0)
+		(property "Description" "1MHz, Low-Power Op Amp, DIP-14/SOIC-14/TSSOP-14"
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+		(uuid "011e5dd0-ef97-4b04-a233-f2ff4e17a86a")
+		(property "Reference" "#PWR04"
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@@ -2541,37 +3339,37 @@
 			)
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 		)
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 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
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-		(lib_id "Device:LED")
-		(at 182.88 29.21 180)
+		(lib_id "Device:R_US")
+		(at 185.42 52.07 90)
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@@ -2579,7 +3377,7 @@
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@@ -2588,7 +3386,75 @@
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@@ -2597,7 +3463,7 @@
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 		)
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-		(property "Reference" "#PWR04"
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@@ -2684,74 +3549,7 @@
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+		(uuid "2a1902ef-d9fa-4b28-ae50-0f2add4dbc5a")
+		(property "Reference" "R16"
+			(at 185.42 57.15 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Value" "120"
+			(at 185.42 59.69 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Footprint" ""
+			(at 185.674 62.484 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "~"
+			(at 185.42 63.5 0)
 			(effects
 				(font
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@@ -2769,7 +3671,75 @@
 			)
 		)
 		(property "Description" "Resistor, US symbol"
-			(at 193.04 33.02 0)
+			(at 185.42 63.5 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "2"
+			(uuid "a3863a0f-4f1c-4cf0-a073-9ca20ca652e7")
+		)
+		(pin "1"
+			(uuid "4a342db6-38d9-4482-936e-dce0de56cdda")
+		)
+		(instances
+			(project "ece223_project"
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
+					(reference "R16")
+					(unit 1)
+				)
+			)
+		)
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+	(symbol
+		(lib_id "Device:R_US")
+		(at 185.42 29.21 90)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "324377ff-6d57-4a69-83cb-a6e680526457")
+		(property "Reference" "R1"
+			(at 185.42 22.86 90)
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+			(at 185.42 25.4 90)
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+		(property "Footprint" ""
+			(at 185.674 28.194 90)
+			(effects
+				(font
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+				(hide yes)
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+		(property "Datasheet" "~"
+			(at 185.42 29.21 0)
+			(effects
+				(font
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+				(hide yes)
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+		(property "Description" "Resistor, US symbol"
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 			(effects
 				(font
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@@ -2792,6 +3762,77 @@
 			)
 		)
 	)
+	(symbol
+		(lib_id "Connector_Audio:AudioJack3")
+		(at 54.61 121.92 0)
+		(mirror y)
+		(unit 1)
+		(exclude_from_sim yes)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(uuid "3edac0a1-b181-4ba9-bfed-bab994572f17")
+		(property "Reference" "J3"
+			(at 56.515 113.03 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
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+		(property "Value" "AudioJack3"
+			(at 56.515 115.57 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Footprint" ""
+			(at 54.61 121.92 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
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+		(property "Datasheet" "~"
+			(at 54.61 121.92 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Audio Jack, 3 Poles (Stereo / TRS)"
+			(at 54.61 121.92 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "S"
+			(uuid "62252445-f19e-4007-ae44-4032a6a83851")
+		)
+		(pin "R"
+			(uuid "9178fdf7-7d79-48b4-ae6e-e0f89623734d")
+		)
+		(pin "T"
+			(uuid "06999cf7-5e96-4591-a2ae-c67ea57c8ee6")
+		)
+		(instances
+			(project "ece223_project"
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
+					(reference "J3")
+					(unit 1)
+				)
+			)
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+	)
 	(symbol
 		(lib_id "power:PWR_FLAG")
 		(at 29.21 35.56 180)
@@ -2802,7 +3843,7 @@
 		(dnp no)
 		(fields_autoplaced yes)
 		(uuid "5d54e224-b00f-42a4-9957-6d2382114b64")
-		(property "Reference" "#FLG02"
+		(property "Reference" "#FLG01"
 			(at 29.21 37.465 0)
 			(effects
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@@ -2852,7 +3893,7 @@
 		(instances
 			(project "ece223_project"
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(reference "#FLG02")
+					(reference "#FLG01")
 					(unit 1)
 				)
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@@ -3006,171 +4047,34 @@
 	)
 	(symbol
 		(lib_id "Amplifier_Operational:MCP6004")
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-		(property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/21733j.pdf"
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-	)
-	(symbol
-		(lib_id "Amplifier_Operational:MCP6004")
-		(at 114.3 85.09 0)
-		(unit 4)
+		(at 93.98 57.15 0)
+		(unit 5)
 		(exclude_from_sim no)
 		(in_bom yes)
 		(on_board yes)
 		(dnp no)
 		(fields_autoplaced yes)
-		(uuid "84bb78cf-8843-4c45-ac3a-56b066cfb76f")
-		(property "Reference" "U8"
-			(at 114.3 74.93 0)
+		(uuid "81a66c6b-fe5b-43cb-9424-9c389d5e62fc")
+		(property "Reference" "U3"
+			(at 92.71 55.8799 0)
 			(effects
 				(font
 					(size 1.27 1.27)
 				)
+				(justify left)
 			)
 		)
 		(property "Value" "MCP6004"
-			(at 114.3 77.47 0)
+			(at 92.71 58.4199 0)
 			(effects
 				(font
 					(size 1.27 1.27)
 				)
+				(justify left)
 			)
 		)
 		(property "Footprint" ""
-			(at 113.03 82.55 0)
+			(at 92.71 54.61 0)
 			(effects
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@@ -3179,7 +4083,7 @@
 			)
 		)
 		(property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/21733j.pdf"
-			(at 115.57 80.01 0)
+			(at 95.25 52.07 0)
 			(effects
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 					(size 1.27 1.27)
@@ -3188,7 +4092,7 @@
 			)
 		)
 		(property "Description" "1MHz, Low-Power Op Amp, DIP-14/SOIC-14/TSSOP-14"
-			(at 114.3 85.09 0)
+			(at 93.98 57.15 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3197,7 +4101,7 @@
 			)
 		)
 		(property "Sim.Library" "MCP6001.lib"
-			(at 114.3 85.09 0)
+			(at 93.98 57.15 0)
 			(effects
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 					(size 1.27 1.27)
@@ -3206,7 +4110,7 @@
 			)
 		)
 		(property "Sim.Name" "MCP6004"
-			(at 114.3 85.09 0)
+			(at 93.98 57.15 0)
 			(effects
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@@ -3215,7 +4119,7 @@
 			)
 		)
 		(property "Sim.Device" "SUBCKT"
-			(at 114.3 85.09 0)
+			(at 93.98 57.15 0)
 			(effects
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@@ -3224,7 +4128,7 @@
 			)
 		)
 		(property "Sim.Pins" "1=OUTA 2=A- 3=A+ 4=VDD 5=B+ 6=B- 7=OUTB 8=OUTC 9=C- 10=C+ 11=VSS 12=D+ 13=D- 14=OUTD"
-			(at 114.3 85.09 0)
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 			(effects
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@@ -3233,52 +4137,52 @@
 			)
 		)
 		(pin "13"
-			(uuid "5fdca11d-2734-4e6e-807e-9dcb8998d831")
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 		)
 		(pin "8"
-			(uuid "30f5683a-d75d-472c-ae7c-ae7e62ac6e69")
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 		)
 		(pin "10"
-			(uuid "2acf4fa4-7993-4464-b7ca-577fd6301819")
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 		)
 		(pin "2"
-			(uuid "cadbdcce-8dc7-43e8-84ff-10ac982f9dd7")
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 		)
 		(pin "3"
-			(uuid "afa90bda-63e1-46ed-8f9e-5f2ca98de5c2")
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 		)
 		(pin "14"
-			(uuid "03c0f5cb-d291-4d4a-bd25-e333f4398241")
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 		)
 		(pin "4"
-			(uuid "eb281645-8f36-4040-979f-3aaa2dc6413c")
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 		)
 		(pin "7"
-			(uuid "e2c578dd-77b8-4ff9-92bc-6e79dbca0d31")
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-			(uuid "270b9ac1-f4ad-4341-af54-699650b53537")
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 		)
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-			(uuid "dc07bffb-a3bb-4585-8c19-282f68bb6abe")
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 		)
 		(pin "1"
-			(uuid "ac4a9bbb-ac03-4347-ab3e-44465f916451")
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 		)
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-			(uuid "f823345c-ed84-4189-9981-4cee78198036")
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 		)
 		(pin "11"
-			(uuid "bbb76668-a696-4f17-a42c-96f1401a31f2")
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 		)
 		(pin "12"
-			(uuid "089a5141-05eb-4eae-807f-00e48fdee24c")
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 		)
 		(instances
 			(project "ece223_project"
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(reference "U8")
-					(unit 4)
+					(reference "U3")
+					(unit 5)
 				)
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@@ -3292,8 +4196,8 @@
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 		(dnp no)
 		(fields_autoplaced yes)
-		(uuid "84bb78cf-8843-4c45-ac3a-56b066cfb76f")
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-			(uuid "2acf4fa4-7993-4464-b7ca-577fd6301819")
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 			(project "ece223_project"
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
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+		(fields_autoplaced yes)
+		(uuid "c144a27d-4582-4525-9393-b152de789aaa")
+		(property "Reference" "J2"
+			(at 24.765 69.85 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Value" "AudioJack3"
+			(at 24.765 72.39 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3763,7 +4942,7 @@
 			)
 		)
 		(property "Footprint" ""
-			(at 76.2 83.82 0)
+			(at 26.67 78.74 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3771,8 +4950,8 @@
 				(hide yes)
 			)
 		)
-		(property "Datasheet" ""
-			(at 76.2 83.82 0)
+		(property "Datasheet" "~"
+			(at 26.67 78.74 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3780,8 +4959,8 @@
 				(hide yes)
 			)
 		)
-		(property "Description" "Power symbol creates a global label with name \"GND\" , ground"
-			(at 76.2 83.82 0)
+		(property "Description" "Audio Jack, 3 Poles (Stereo / TRS)"
+			(at 26.67 78.74 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3789,21 +4968,234 @@
 				(hide yes)
 			)
 		)
-		(pin "1"
-			(uuid "d76de341-5b41-4db9-bfde-355d0cf0f37b")
+		(pin "S"
+			(uuid "7eae5a0a-041f-4e0d-9bd8-15dc74b8f0e4")
+		)
+		(pin "R"
+			(uuid "98abe634-7de9-44f3-b1ac-47da5244ee32")
+		)
+		(pin "T"
+			(uuid "6ff6d838-8f18-4965-8d38-562ec01f6e9f")
 		)
 		(instances
-			(project "ece223_project"
+			(project ""
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(reference "#PWR05")
+					(reference "J2")
 					(unit 1)
 				)
 			)
 		)
 	)
+	(symbol
+		(lib_id "Device:R_US")
+		(at 36.83 124.46 90)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(uuid "c3fdb907-d84a-4a5c-8f68-ccb6eb3776df")
+		(property "Reference" "R19"
+			(at 36.83 128.27 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Value" "2"
+			(at 36.83 130.556 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Footprint" ""
+			(at 37.084 123.444 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "~"
+			(at 36.83 124.46 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Resistor, US symbol"
+			(at 36.83 124.46 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "2"
+			(uuid "d8e70c66-4872-4ead-9da6-dd21c37ba5e3")
+		)
+		(pin "1"
+			(uuid "8f1bfc68-9dd9-48de-bc46-9158d5c61933")
+		)
+		(instances
+			(project ""
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
+					(reference "R19")
+					(unit 1)
+				)
+			)
+		)
+	)
+	(symbol
+		(lib_id "Amplifier_Operational:MCP6004")
+		(at 110.49 85.09 0)
+		(unit 4)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "c89a4947-7925-4993-8618-e02e0bdbd1dd")
+		(property "Reference" "U4"
+			(at 110.49 74.93 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Value" "MCP6004"
+			(at 110.49 77.47 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Footprint" ""
+			(at 109.22 82.55 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/21733j.pdf"
+			(at 111.76 80.01 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "1MHz, Low-Power Op Amp, DIP-14/SOIC-14/TSSOP-14"
+			(at 110.49 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Library" "MCP6001.lib"
+			(at 110.49 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Name" "MCP6004"
+			(at 110.49 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Device" "SUBCKT"
+			(at 110.49 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Pins" "1=OUTA 2=A- 3=A+ 4=VDD 5=B+ 6=B- 7=OUTB 8=OUTC 9=C- 10=C+ 11=VSS 12=D+ 13=D- 14=OUTD"
+			(at 110.49 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "13"
+			(uuid "487b4368-bdc2-4cce-b8da-e6622bc68900")
+		)
+		(pin "8"
+			(uuid "30f5683a-d75d-472c-ae7c-ae7e62ac6e69")
+		)
+		(pin "10"
+			(uuid "2acf4fa4-7993-4464-b7ca-577fd6301819")
+		)
+		(pin "2"
+			(uuid "198220aa-585b-47c9-aa90-04bdee71f59a")
+		)
+		(pin "3"
+			(uuid "92257fd3-d5ba-4b08-9997-dd833f089e4a")
+		)
+		(pin "14"
+			(uuid "a3d56c34-edac-45ac-8510-a9575ec17def")
+		)
+		(pin "4"
+			(uuid "eb281645-8f36-4040-979f-3aaa2dc6413c")
+		)
+		(pin "7"
+			(uuid "c005ded4-3a2d-47a8-9bd3-049636909ac7")
+		)
+		(pin "9"
+			(uuid "270b9ac1-f4ad-4341-af54-699650b53537")
+		)
+		(pin "6"
+			(uuid "b6c8b192-37fd-411c-9f27-8861047d3e16")
+		)
+		(pin "1"
+			(uuid "d938bc20-94b3-4b57-bae8-dfd38ef0d125")
+		)
+		(pin "5"
+			(uuid "482febf3-e04f-4439-8e3b-7c44a86410b6")
+		)
+		(pin "11"
+			(uuid "bbb76668-a696-4f17-a42c-96f1401a31f2")
+		)
+		(pin "12"
+			(uuid "e4bd8918-c041-4c5f-89ef-636b5c9af459")
+		)
+		(instances
+			(project "ece223_project"
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
+					(reference "U4")
+					(unit 4)
+				)
+			)
+		)
+	)
 	(symbol
 		(lib_id "power:GND")
-		(at 193.04 36.83 0)
+		(at 194.31 66.04 0)
 		(unit 1)
 		(exclude_from_sim no)
 		(in_bom yes)
@@ -3811,8 +5203,8 @@
 		(dnp no)
 		(fields_autoplaced yes)
 		(uuid "d1f41c99-8577-41de-aa44-f83eccfde11b")
-		(property "Reference" "#PWR02"
-			(at 193.04 43.18 0)
+		(property "Reference" "#PWR03"
+			(at 194.31 72.39 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3821,7 +5213,7 @@
 			)
 		)
 		(property "Value" "GND"
-			(at 193.04 41.91 0)
+			(at 194.31 71.12 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3829,7 +5221,7 @@
 			)
 		)
 		(property "Footprint" ""
-			(at 193.04 36.83 0)
+			(at 194.31 66.04 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3838,7 +5230,7 @@
 			)
 		)
 		(property "Datasheet" ""
-			(at 193.04 36.83 0)
+			(at 194.31 66.04 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3847,7 +5239,7 @@
 			)
 		)
 		(property "Description" "Power symbol creates a global label with name \"GND\" , ground"
-			(at 193.04 36.83 0)
+			(at 194.31 66.04 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3861,17 +5253,157 @@
 		(instances
 			(project ""
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(reference "#PWR02")
+					(reference "#PWR03")
 					(unit 1)
 				)
 			)
 		)
 	)
+	(symbol
+		(lib_id "Amplifier_Operational:MCP6004")
+		(at 64.77 85.09 0)
+		(unit 2)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "d564196f-fd72-4ee2-adca-31c2d8d27cc5")
+		(property "Reference" "U4"
+			(at 64.77 74.93 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Value" "MCP6004"
+			(at 64.77 77.47 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Footprint" ""
+			(at 63.5 82.55 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/21733j.pdf"
+			(at 66.04 80.01 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "1MHz, Low-Power Op Amp, DIP-14/SOIC-14/TSSOP-14"
+			(at 64.77 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Library" "MCP6001.lib"
+			(at 64.77 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Name" "MCP6004"
+			(at 64.77 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Device" "SUBCKT"
+			(at 64.77 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Pins" "1=OUTA 2=A- 3=A+ 4=VDD 5=B+ 6=B- 7=OUTB 8=OUTC 9=C- 10=C+ 11=VSS 12=D+ 13=D- 14=OUTD"
+			(at 64.77 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "13"
+			(uuid "487b4368-bdc2-4cce-b8da-e6622bc68900")
+		)
+		(pin "8"
+			(uuid "30f5683a-d75d-472c-ae7c-ae7e62ac6e69")
+		)
+		(pin "10"
+			(uuid "2acf4fa4-7993-4464-b7ca-577fd6301819")
+		)
+		(pin "2"
+			(uuid "198220aa-585b-47c9-aa90-04bdee71f59a")
+		)
+		(pin "3"
+			(uuid "92257fd3-d5ba-4b08-9997-dd833f089e4a")
+		)
+		(pin "14"
+			(uuid "a3d56c34-edac-45ac-8510-a9575ec17def")
+		)
+		(pin "4"
+			(uuid "eb281645-8f36-4040-979f-3aaa2dc6413c")
+		)
+		(pin "7"
+			(uuid "f23a95c5-0a5e-4123-b54c-efc996cc6fc7")
+		)
+		(pin "9"
+			(uuid "270b9ac1-f4ad-4341-af54-699650b53537")
+		)
+		(pin "6"
+			(uuid "62ed06ba-3a15-44e1-9b0c-a6bce428c38c")
+		)
+		(pin "1"
+			(uuid "d938bc20-94b3-4b57-bae8-dfd38ef0d125")
+		)
+		(pin "5"
+			(uuid "a518bde5-169a-4774-889c-4231ff775667")
+		)
+		(pin "11"
+			(uuid "bbb76668-a696-4f17-a42c-96f1401a31f2")
+		)
+		(pin "12"
+			(uuid "e4bd8918-c041-4c5f-89ef-636b5c9af459")
+		)
+		(instances
+			(project "ece223_project"
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
+					(reference "U4")
+					(unit 2)
+				)
+			)
+		)
+	)
 	(symbol
 		(lib_id "Device:Battery")
 		(at 22.86 30.48 0)
 		(unit 1)
-		(exclude_from_sim no)
+		(exclude_from_sim yes)
 		(in_bom yes)
 		(on_board yes)
 		(dnp no)
@@ -3973,18 +5505,160 @@
 			)
 		)
 	)
+	(symbol
+		(lib_id "Amplifier_Operational:MCP6004")
+		(at 106.68 57.15 0)
+		(unit 5)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "dd363c8a-5dc2-4a26-bf7b-7e264c59c647")
+		(property "Reference" "U4"
+			(at 105.41 55.8799 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Value" "MCP6004"
+			(at 105.41 58.4199 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Footprint" ""
+			(at 105.41 54.61 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "http://ww1.microchip.com/downloads/en/DeviceDoc/21733j.pdf"
+			(at 107.95 52.07 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "1MHz, Low-Power Op Amp, DIP-14/SOIC-14/TSSOP-14"
+			(at 106.68 57.15 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Library" "MCP6001.lib"
+			(at 106.68 57.15 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Name" "MCP6004"
+			(at 106.68 57.15 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Device" "SUBCKT"
+			(at 106.68 57.15 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Pins" "1=OUTA 2=A- 3=A+ 4=VDD 5=B+ 6=B- 7=OUTB 8=OUTC 9=C- 10=C+ 11=VSS 12=D+ 13=D- 14=OUTD"
+			(at 106.68 57.15 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "13"
+			(uuid "5fdca11d-2734-4e6e-807e-9dcb8998d833")
+		)
+		(pin "8"
+			(uuid "30f5683a-d75d-472c-ae7c-ae7e62ac6e6b")
+		)
+		(pin "10"
+			(uuid "2acf4fa4-7993-4464-b7ca-577fd630181b")
+		)
+		(pin "2"
+			(uuid "cadbdcce-8dc7-43e8-84ff-10ac982f9dd9")
+		)
+		(pin "3"
+			(uuid "afa90bda-63e1-46ed-8f9e-5f2ca98de5c4")
+		)
+		(pin "14"
+			(uuid "03c0f5cb-d291-4d4a-bd25-e333f4398243")
+		)
+		(pin "4"
+			(uuid "a2c757a8-99c3-496a-b1d9-4525c893fe85")
+		)
+		(pin "7"
+			(uuid "e2c578dd-77b8-4ff9-92bc-6e79dbca0d33")
+		)
+		(pin "9"
+			(uuid "270b9ac1-f4ad-4341-af54-699650b53539")
+		)
+		(pin "6"
+			(uuid "dc07bffb-a3bb-4585-8c19-282f68bb6ac0")
+		)
+		(pin "1"
+			(uuid "ac4a9bbb-ac03-4347-ab3e-44465f916453")
+		)
+		(pin "5"
+			(uuid "f823345c-ed84-4189-9981-4cee78198038")
+		)
+		(pin "11"
+			(uuid "5f9c1db2-a930-4bc5-b9ee-ce86a43a3bbe")
+		)
+		(pin "12"
+			(uuid "089a5141-05eb-4eae-807f-00e48fdee24e")
+		)
+		(instances
+			(project "ece223_project"
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
+					(reference "U4")
+					(unit 5)
+				)
+			)
+		)
+	)
 	(symbol
 		(lib_id "power:GND")
-		(at 87.63 34.29 0)
+		(at 99.06 87.63 0)
 		(unit 1)
 		(exclude_from_sim no)
 		(in_bom yes)
 		(on_board yes)
 		(dnp no)
 		(fields_autoplaced yes)
-		(uuid "f5ba7116-14d0-4068-a021-043a75734974")
-		(property "Reference" "#PWR03"
-			(at 87.63 40.64 0)
+		(uuid "e2e6f110-1986-4e6b-aafb-81a3f6782af5")
+		(property "Reference" "#PWR06"
+			(at 99.06 93.98 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -3993,7 +5667,7 @@
 			)
 		)
 		(property "Value" "GND"
-			(at 87.63 39.37 0)
+			(at 99.06 92.71 0)
 			(effects
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@@ -4001,7 +5675,7 @@
 			)
 		)
 		(property "Footprint" ""
-			(at 87.63 34.29 0)
+			(at 99.06 87.63 0)
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@@ -4010,7 +5684,7 @@
 			)
 		)
 		(property "Datasheet" ""
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+			(at 99.06 87.63 0)
 			(effects
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@@ -4019,7 +5693,73 @@
 			)
 		)
 		(property "Description" "Power symbol creates a global label with name \"GND\" , ground"
-			(at 87.63 34.29 0)
+			(at 99.06 87.63 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "1"
+			(uuid "d4767dbd-c2d7-4879-9bb9-fdda799abcdb")
+		)
+		(instances
+			(project "ece223_project"
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
+					(reference "#PWR06")
+					(unit 1)
+				)
+			)
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+	)
+	(symbol
+		(lib_id "power:GND")
+		(at 81.28 34.29 0)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
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+		(fields_autoplaced yes)
+		(uuid "f5ba7116-14d0-4068-a021-043a75734974")
+		(property "Reference" "#PWR02"
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+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
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+		(property "Value" "GND"
+			(at 81.28 39.37 0)
+			(effects
+				(font
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+				)
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+		(property "Footprint" ""
+			(at 81.28 34.29 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
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+		(property "Datasheet" ""
+			(at 81.28 34.29 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Power symbol creates a global label with name \"GND\" , ground"
+			(at 81.28 34.29 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -4033,7 +5773,7 @@
 		(instances
 			(project "ece223_project"
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(reference "#PWR03")
+					(reference "#PWR02")
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@@ -4049,7 +5789,7 @@
 		(dnp no)
 		(fields_autoplaced yes)
 		(uuid "f7cd036d-9208-4957-8ab1-c7912e598449")
-		(property "Reference" "U7"
+		(property "Reference" "U1"
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 			(effects
 				(font
@@ -4131,13 +5871,13 @@
 			)
 		)
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-			(uuid "5fdca11d-2734-4e6e-807e-9dcb8998d831")
+			(uuid "5fdca11d-2734-4e6e-807e-9dcb8998d835")
 		)
 		(pin "8"
-			(uuid "30f5683a-d75d-472c-ae7c-ae7e62ac6e69")
+			(uuid "30f5683a-d75d-472c-ae7c-ae7e62ac6e6d")
 		)
 		(pin "10"
-			(uuid "2acf4fa4-7993-4464-b7ca-577fd6301819")
+			(uuid "2acf4fa4-7993-4464-b7ca-577fd630181d")
 		)
 		(pin "2"
 			(uuid "198220aa-585b-47c9-aa90-04bdee71f59a")
@@ -4146,7 +5886,7 @@
 			(uuid "92257fd3-d5ba-4b08-9997-dd833f089e4a")
 		)
 		(pin "14"
-			(uuid "03c0f5cb-d291-4d4a-bd25-e333f4398241")
+			(uuid "03c0f5cb-d291-4d4a-bd25-e333f4398245")
 		)
 		(pin "4"
 			(uuid "bc198a7c-1ba2-494e-915c-d1692fe75510")
@@ -4155,7 +5895,7 @@
 			(uuid "280c5749-90d5-4212-9c8d-2e8cd0cd3c01")
 		)
 		(pin "9"
-			(uuid "270b9ac1-f4ad-4341-af54-699650b53537")
+			(uuid "270b9ac1-f4ad-4341-af54-699650b5353b")
 		)
 		(pin "6"
 			(uuid "481802bf-8574-4fd0-a3b4-633e10b6c282")
@@ -4170,20 +5910,20 @@
 			(uuid "c97da68e-f743-4a43-862b-042f55b8e74f")
 		)
 		(pin "12"
-			(uuid "089a5141-05eb-4eae-807f-00e48fdee24c")
+			(uuid "089a5141-05eb-4eae-807f-00e48fdee250")
 		)
 		(instances
 			(project "ece223_project"
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(reference "U7")
+					(reference "U1")
 					(unit 5)
 				)
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 		)
 	)
 	(sheet
-		(at 134.62 48.26)
-		(size 12.7 7.62)
+		(at 128.27 76.2)
+		(size 15.24 7.62)
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 		(in_bom yes)
 		(on_board yes)
@@ -4198,7 +5938,7 @@
 		)
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 		(property "Sheetname" "OUTPUT_GAIN"
-			(at 134.62 47.5484 0)
+			(at 128.27 75.4884 0)
 			(effects
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@@ -4207,7 +5947,7 @@
 			)
 		)
 		(property "Sheetfile" "audio_gain.kicad_sch"
-			(at 134.62 56.4646 0)
+			(at 128.27 84.4046 0)
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@@ -4216,7 +5956,7 @@
 			)
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 		(pin "IN" input
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@@ -4226,7 +5966,7 @@
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@@ -4238,14 +5978,14 @@
 		(instances
 			(project "ece223_project"
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(page "5")
+					(page "6")
 				)
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 		)
 	)
 	(sheet
-		(at 134.62 25.4)
-		(size 12.7 7.62)
+		(at 128.27 25.4)
+		(size 15.24 41.91)
 		(exclude_from_sim no)
 		(in_bom yes)
 		(on_board yes)
@@ -4259,8 +5999,8 @@
 			(color 0 0 0 0.0000)
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 		(uuid "471db3e4-e213-4827-95bb-9215dfa99989")
-		(property "Sheetname" "LP"
-			(at 134.62 24.6884 0)
+		(property "Sheetname" "FILTERS"
+			(at 128.27 24.6884 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -4268,8 +6008,8 @@
 				(justify left bottom)
 			)
 		)
-		(property "Sheetfile" "LP.kicad_sch"
-			(at 134.62 33.6046 0)
+		(property "Sheetfile" "filters.kicad_sch"
+			(at 128.27 67.8946 0)
 			(effects
 				(font
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@@ -4277,9 +6017,9 @@
 				(justify left top)
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-		(pin "IN" input
-			(at 134.62 29.21 180)
-			(uuid "9ac28383-d7bf-47f1-8465-35f71a9ec3a5")
+		(pin "IBP1" input
+			(at 128.27 40.64 180)
+			(uuid "71faa959-4f63-4a6c-a08c-cd8b722583e2")
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -4287,9 +6027,69 @@
 				(justify left)
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 		)
-		(pin "OUT" input
-			(at 147.32 29.21 0)
-			(uuid "e6d861cb-9375-415c-8649-60728ae4e9d3")
+		(pin "IBP2" input
+			(at 128.27 52.07 180)
+			(uuid "f8b4e774-d2f8-4054-aad1-cc9e4ef18054")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(pin "ILP" input
+			(at 128.27 29.21 180)
+			(uuid "1ea1a7f4-5c72-4634-81b2-29532b54e8ef")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(pin "OBP1" output
+			(at 143.51 40.64 0)
+			(uuid "c5a7f3e0-0f7f-455b-9cc7-6ddcae161103")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(pin "OBP2" output
+			(at 143.51 52.07 0)
+			(uuid "38bbf707-7518-47f3-9993-b2706b0666ee")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(pin "OLP" output
+			(at 143.51 29.21 0)
+			(uuid "1b9feab5-cf42-4e9e-ba1e-ec0b93c1d01a")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(pin "IHP" input
+			(at 128.27 63.5 180)
+			(uuid "60079acf-0a91-45e8-9728-643d42e4aac7")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(pin "OHP" output
+			(at 143.51 63.5 0)
+			(uuid "223ec389-499a-4b06-a78a-1822fc9222b3")
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -4300,7 +6100,7 @@
 		(instances
 			(project "ece223_project"
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(page "2")
+					(page "4")
 				)
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 		)
@@ -4392,13 +6192,13 @@
 		(instances
 			(project "ece223_project"
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(page "4")
+					(page "2")
 				)
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 		)
 	)
 	(sheet
-		(at 107.95 25.4)
+		(at 101.6 25.4)
 		(size 12.7 7.62)
 		(exclude_from_sim no)
 		(in_bom yes)
@@ -4413,7 +6213,7 @@
 		)
 		(uuid "92a045e3-bee5-40f5-b5ce-8fe433234af4")
 		(property "Sheetname" "INPUT_GAIN"
-			(at 107.95 24.6884 0)
+			(at 101.6 24.6884 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -4422,7 +6222,7 @@
 			)
 		)
 		(property "Sheetfile" "input_gain.kicad_sch"
-			(at 101.346 33.782 0)
+			(at 94.996 33.782 0)
 			(effects
 				(font
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@@ -4431,7 +6231,7 @@
 			)
 		)
 		(pin "IN" input
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+			(at 101.6 29.21 180)
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 				(font
@@ -4441,7 +6241,7 @@
 			)
 		)
 		(pin "OUT" input
-			(at 120.65 29.21 0)
+			(at 114.3 29.21 0)
 			(uuid "1e5178e9-9968-452e-9ed2-914bb9a9e2a8")
 			(effects
 				(font
@@ -4450,68 +6250,6 @@
 				(justify right)
 			)
 		)
-		(instances
-			(project "ece223_project"
-				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
-					(page "6")
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-		)
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-	(sheet
-		(at 156.21 25.4)
-		(size 15.24 7.62)
-		(exclude_from_sim no)
-		(in_bom yes)
-		(on_board yes)
-		(dnp no)
-		(fields_autoplaced yes)
-		(stroke
-			(width 0.1524)
-			(type solid)
-		)
-		(fill
-			(color 0 0 0 0.0000)
-		)
-		(uuid "d9a3b005-3318-4b28-ad94-fa560a1f4e7a")
-		(property "Sheetname" "LED_GAIN1"
-			(at 156.21 24.6884 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left bottom)
-			)
-		)
-		(property "Sheetfile" "led_gain.kicad_sch"
-			(at 156.21 33.6046 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify left top)
-			)
-		)
-		(pin "IN" input
-			(at 156.21 29.21 180)
-			(uuid "ebd511ab-77ec-4338-9e1d-7ab5e8d1c2cd")
-			(effects
-				(font
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-				(justify left)
-			)
-		)
-		(pin "OUT" input
-			(at 171.45 29.21 0)
-			(uuid "70ffaf1f-0465-408c-95c5-7f8192375e96")
-			(effects
-				(font
-					(size 1.27 1.27)
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-				(justify right)
-			)
-		)
 		(instances
 			(project "ece223_project"
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
@@ -4520,10 +6258,152 @@
 			)
 		)
 	)
+	(sheet
+		(at 151.13 25.4)
+		(size 16.51 41.91)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(stroke
+			(width 0.1524)
+			(type solid)
+		)
+		(fill
+			(color 0 0 0 0.0000)
+		)
+		(uuid "d9a3b005-3318-4b28-ad94-fa560a1f4e7a")
+		(property "Sheetname" "LED_GAIN"
+			(at 151.13 24.6884 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left bottom)
+			)
+		)
+		(property "Sheetfile" "led_gain.kicad_sch"
+			(at 151.13 67.8946 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left top)
+			)
+		)
+		(pin "INA" input
+			(at 151.13 29.21 180)
+			(uuid "fb7b5880-5842-40b2-9d94-dd32751bba8f")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(pin "INB" input
+			(at 151.13 40.64 180)
+			(uuid "60c62b90-0236-45e3-94a9-0cf9faf5ac94")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(pin "INC" input
+			(at 151.13 52.07 180)
+			(uuid "9db2c7f5-473a-4048-b296-98053cc5f590")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(pin "IND" input
+			(at 151.13 63.5 180)
+			(uuid "b9ef2374-f0a2-42a9-a82b-daffdd4b89e3")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(pin "OUTA" output
+			(at 167.64 29.21 0)
+			(uuid "f38de49d-b60f-4169-8b23-8d5ceee1f017")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(pin "OUTB" output
+			(at 167.64 40.64 0)
+			(uuid "1543ec73-1f9d-4ec7-97fe-a5d8bf6587a1")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(pin "OUTC" output
+			(at 167.64 52.07 0)
+			(uuid "673d4332-57d0-4263-973f-4a36ffee80aa")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(pin "OUTD" output
+			(at 167.64 63.5 0)
+			(uuid "2af448a3-ee66-44cc-8c1e-c2be66dcb653")
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(instances
+			(project "ece223_project"
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396"
+					(page "5")
+				)
+			)
+		)
+	)
 	(sheet_instances
 		(path "/"
 			(page "1")
 		)
 	)
 	(embedded_fonts no)
+	(embedded_files
+		(file
+			(name "template.kicad_wks")
+			(type worksheet)
+			(data |KLUv/WB7CIUUAKbdXSEA1TZqxSYpSnAbOsWn6jgBcMQyc4EzL++4wmTo/39CwQRUAEwAWAD4I/F3
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+			)
+			(checksum "D7E894D99CAE1579FD384BD3D7B35626")
+		)
+	)
 )
diff --git a/ece223_project.wbk b/ece223_project.wbk
index 25b7bb0..c737042 100644
--- a/ece223_project.wbk
+++ b/ece223_project.wbk
@@ -4,7 +4,7 @@
     {
       "analysis": "TRAN",
       "commands": [
-        ".tran 1u 1.3m 0 1u uic",
+        ".tran 100u 10m 0 100u uic",
         ".kicad adjustpaths",
         ".save all",
         ".probe alli",
@@ -17,16 +17,48 @@
         "right": 70,
         "top": 30
       },
-      "measurements": [],
+      "measurements": [
+        {
+          "expr": "MAX V(/FILTERS/OBP1)",
+          "format": "3~V"
+        },
+        {
+          "expr": "MAX V(/FILTERS/OBP2)",
+          "format": "3~V"
+        },
+        {
+          "expr": "MAX V(/FILTERS/OHP)",
+          "format": "3~V"
+        },
+        {
+          "expr": "MAX V(/FILTERS/OLP)",
+          "format": "3~V"
+        }
+      ],
       "showGrid": true,
       "traces": [
         {
-          "color": "rgb(255, 8, 49)",
+          "color": "rgb(229, 196, 148)",
+          "signal": "V(/FILTERS/OBP1)",
+          "trace_type": 257
+        },
+        {
+          "color": "rgb(247, 129, 191)",
+          "signal": "V(/LED_GAIN/BREF)",
+          "trace_type": 257
+        },
+        {
+          "color": "rgb(77, 175, 74)",
+          "signal": "V(/LED_GAIN/OUTB)",
+          "trace_type": 257
+        },
+        {
+          "color": "rgb(152, 78, 163)",
           "signal": "V(VCC)",
           "trace_type": 257
         },
         {
-          "color": "rgb(176, 180, 0)",
+          "color": "rgb(255, 127, 0)",
           "signal": "V(VREF)",
           "trace_type": 257
         }
diff --git a/filters.kicad_sch b/filters.kicad_sch
new file mode 100644
index 0000000..079ee73
--- /dev/null
+++ b/filters.kicad_sch
@@ -0,0 +1,3309 @@
+(kicad_sch
+	(version 20250114)
+	(generator "eeschema")
+	(generator_version "9.0")
+	(uuid "a18ea684-61c3-4005-a50b-6f721c53937e")
+	(paper "USLetter")
+	(title_block
+		(title "EL223FP4L1")
+		(date "2025-05-08")
+		(rev "1")
+		(company "Boles & Walker")
+		(comment 1 "LP, BP1, BP2, HP Filters")
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diff --git a/input_gain.kicad_sch b/input_gain.kicad_sch
index 219aa6d..d08f00e 100644
--- a/input_gain.kicad_sch
+++ b/input_gain.kicad_sch
@@ -3,7 +3,13 @@
 	(generator "eeschema")
 	(generator_version "9.0")
 	(uuid "5f207800-3230-423e-a36a-73659ad0e23f")
-	(paper "A4")
+	(paper "USLetter")
+	(title_block
+		(title "EL223FP4L1")
+		(date "2025-05-08")
+		(rev "1")
+		(company "Boles & Walker")
+	)
 	(lib_symbols
 		(symbol "Amplifier_Operational:MCP6004"
 			(pin_names
@@ -974,7 +980,7 @@
 		(uuid "a98bb9a5-5053-41c1-8e68-2bc5e0c05823")
 	)
 	(hierarchical_label "OUT"
-		(shape input)
+		(shape output)
 		(at 77.47 36.83 0)
 		(effects
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@@ -994,7 +1000,7 @@
 		(dnp no)
 		(fields_autoplaced yes)
 		(uuid "08974f48-4704-443a-adc8-d52d119c62e0")
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 			(at 41.91 46.99 90)
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@@ -1046,152 +1052,12 @@
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-					(reference "R9")
+					(reference "R12")
 					(unit 1)
 				)
 			)
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@@ -1202,7 +1068,7 @@
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 		(fields_autoplaced yes)
 		(uuid "5d474325-9e9e-49da-a39f-23f903f781ea")
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@@ -1295,12 +1161,152 @@
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-					(reference "RV3")
+					(reference "RV2")
 					(unit 1)
 				)
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+	(symbol
+		(lib_id "Amplifier_Operational:MCP6004")
+		(at 58.42 36.83 0)
+		(unit 4)
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diff --git a/led_gain.kicad_sch b/led_gain.kicad_sch
index ed22978..230092c 100644
--- a/led_gain.kicad_sch
+++ b/led_gain.kicad_sch
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+		(title "EL223FP4L1")
+		(date "2025-05-08")
+		(rev "1")
+		(company "Boles & Walker")
+		(comment 1 "LED Comparator")
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+				(hide yes)
+			)
+		)
+		(property "Sim.Name" "MCP6004"
+			(at 142.24 59.69 0)
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+				(font
+					(size 1.27 1.27)
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+				(hide yes)
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+				(hide yes)
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+				(font
+					(size 1.27 1.27)
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+		)
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+			(uuid "089a5141-05eb-4eae-807f-00e48fdee24c")
+		)
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+			(project "ece223_project"
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+			)
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+	)
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+		(lib_id "Amplifier_Operational:MCP6004")
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+				(font
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+				(hide yes)
+			)
+		)
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+				(font
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+				(hide yes)
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+				(hide yes)
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+				(font
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+				(hide yes)
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+				(font
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+				(hide yes)
+			)
+		)
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+				(font
+					(size 1.27 1.27)
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+			(uuid "2acf4fa4-7993-4464-b7ca-577fd6301819")
+		)
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+			(uuid "089a5141-05eb-4eae-807f-00e48fdee24c")
+		)
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+			(project "ece223_project"
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396/d9a3b005-3318-4b28-ad94-fa560a1f4e7a"
+					(reference "U2")
+					(unit 2)
+				)
+			)
+		)
+	)
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+		(lib_id "Device:R_Potentiometer_US")
+		(at 123.19 139.7 90)
+		(unit 1)
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+		(on_board yes)
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+		(fields_autoplaced yes)
+		(uuid "ff5f203e-5e8b-4455-be54-0d374ae09d99")
+		(property "Reference" "RV6"
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+				(hide yes)
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+			(effects
+				(font
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+				(hide yes)
+			)
+		)
+		(property "Description" "Potentiometer, US symbol"
+			(at 123.19 139.7 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
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+				(font
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+				(hide yes)
+			)
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+			(at 123.19 139.7 0)
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+					(size 1.27 1.27)
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+				(hide yes)
+			)
+		)
+		(property "Sim.Pins" "1=r0 2=wiper 3=r1"
+			(at 123.19 139.7 0)
+			(effects
+				(font
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+				(hide yes)
+			)
+		)
+		(property "Sim.Params" "r=5k pos=0.832"
+			(at 123.19 139.7 0)
+			(effects
+				(font
+					(size 1.27 1.27)
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+				(hide yes)
+			)
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+			(uuid "af847268-ed75-4621-a9d3-f46ff7ce8d23")
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+			(uuid "1d941b4d-bd90-4459-ba04-1021d738d61c")
+		)
+		(pin "2"
+			(uuid "cdb085ed-c868-4578-ba78-c8f3bd74d378")
+		)
+		(instances
+			(project "ece223_project"
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396/d9a3b005-3318-4b28-ad94-fa560a1f4e7a"
+					(reference "RV6")
 					(unit 1)
 				)
 			)
diff --git a/rail_gen.kicad_sch b/rail_gen.kicad_sch
index 7006b05..8111331 100644
--- a/rail_gen.kicad_sch
+++ b/rail_gen.kicad_sch
@@ -3,7 +3,14 @@
 	(generator "eeschema")
 	(generator_version "9.0")
 	(uuid "bae285c4-ab5c-4415-b389-da0be21324c6")
-	(paper "A4")
+	(paper "USLetter")
+	(title_block
+		(title "EL223FP4L1")
+		(date "2025-05-08")
+		(rev "1")
+		(company "Boles & Walker")
+		(comment 1 "5V, 2.5V Rail Generator")
+	)
 	(lib_symbols
 		(symbol "Amplifier_Operational:MCP6004"
 			(pin_names
@@ -1044,6 +1051,310 @@
 			)
 			(embedded_fonts no)
 		)
+		(symbol "Simulation_SPICE:VDC"
+			(pin_numbers
+				(hide yes)
+			)
+			(pin_names
+				(offset 0.0254)
+			)
+			(exclude_from_sim no)
+			(in_bom yes)
+			(on_board yes)
+			(property "Reference" "V"
+				(at 2.54 2.54 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(justify left)
+				)
+			)
+			(property "Value" "1"
+				(at 2.54 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(justify left)
+				)
+			)
+			(property "Footprint" ""
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Datasheet" "https://ngspice.sourceforge.io/docs/ngspice-html-manual/manual.xhtml#sec_Independent_Sources_for"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Description" "Voltage source, DC"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Sim.Pins" "1=+ 2=-"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Sim.Type" "DC"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Sim.Device" "V"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(justify left)
+					(hide yes)
+				)
+			)
+			(property "ki_keywords" "simulation"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(symbol "VDC_0_0"
+				(polyline
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+					)
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+					(pts
+						(xy -0.762 -0.254) (xy -1.27 -0.254)
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+						(type default)
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+					(fill
+						(type none)
+					)
+				)
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+						(xy 0.254 -0.254) (xy -0.254 -0.254)
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+					)
+				)
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+					)
+					(stroke
+						(width 0)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+				(text "+"
+					(at 0 1.905 0)
+					(effects
+						(font
+							(size 1.27 1.27)
+						)
+					)
+				)
+			)
+			(symbol "VDC_0_1"
+				(circle
+					(center 0 0)
+					(radius 2.54)
+					(stroke
+						(width 0.254)
+						(type default)
+					)
+					(fill
+						(type background)
+					)
+				)
+			)
+			(symbol "VDC_1_1"
+				(pin passive line
+					(at 0 5.08 270)
+					(length 2.54)
+					(name "~"
+						(effects
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+					)
+					(number "1"
+						(effects
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+					(length 2.54)
+					(name "~"
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+						)
+					)
+					(number "2"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+				)
+			)
+			(embedded_fonts no)
+		)
+		(symbol "power:PWR_FLAG"
+			(power)
+			(pin_numbers
+				(hide yes)
+			)
+			(pin_names
+				(offset 0)
+				(hide yes)
+			)
+			(exclude_from_sim no)
+			(in_bom yes)
+			(on_board yes)
+			(property "Reference" "#FLG"
+				(at 0 1.905 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Value" "PWR_FLAG"
+				(at 0 3.81 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+				)
+			)
+			(property "Footprint" ""
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Datasheet" "~"
+				(at 0 0 0)
+				(effects
+					(font
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+					(hide yes)
+				)
+			)
+			(property "Description" "Special symbol for telling ERC where power comes from"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "ki_keywords" "flag power"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(symbol "PWR_FLAG_0_0"
+				(pin power_out line
+					(at 0 0 90)
+					(length 0)
+					(name "~"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+					(number "1"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+				)
+			)
+			(symbol "PWR_FLAG_0_1"
+				(polyline
+					(pts
+						(xy 0 0) (xy 0 1.27) (xy -1.016 1.905) (xy 0 2.54) (xy 1.016 1.905) (xy 0 1.27)
+					)
+					(stroke
+						(width 0)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+			)
+			(embedded_fonts no)
+		)
 	)
 	(text ".param ss=0\n.options chgtol=1e-11 abstol=10u gmin=1e-10"
 		(exclude_from_sim no)
@@ -1056,12 +1367,30 @@
 		)
 		(uuid "25efee7b-b331-4e1c-81b0-5a50ae8be343")
 	)
+	(junction
+		(at 74.93 35.56)
+		(diameter 0)
+		(color 0 0 0 0)
+		(uuid "02801520-8810-4528-9445-17cbf8374a18")
+	)
+	(junction
+		(at 97.79 66.04)
+		(diameter 0)
+		(color 0 0 0 0)
+		(uuid "02ada53e-a8ee-4c7f-9f95-b5d17b309d21")
+	)
 	(junction
 		(at 36.83 35.56)
 		(diameter 0)
 		(color 0 0 0 0)
 		(uuid "1578a6be-dda1-469a-a376-223143ba9556")
 	)
+	(junction
+		(at 86.36 35.56)
+		(diameter 0)
+		(color 0 0 0 0)
+		(uuid "25733395-9c11-44b8-a059-4df209be2751")
+	)
 	(junction
 		(at 109.22 49.53)
 		(diameter 0)
@@ -1075,16 +1404,16 @@
 		(uuid "45d1c238-d302-4b0f-9e7d-c641c0f21fe0")
 	)
 	(junction
-		(at 81.28 35.56)
+		(at 142.24 52.07)
 		(diameter 0)
 		(color 0 0 0 0)
-		(uuid "63df011e-1739-49ff-a52b-4e0d806ccf88")
+		(uuid "6a437be7-562a-4055-9ff0-73f3c687c08d")
 	)
 	(junction
-		(at 156.21 52.07)
+		(at 86.36 66.04)
 		(diameter 0)
 		(color 0 0 0 0)
-		(uuid "86e80d7d-f452-4bdd-84a9-e28277458ef0")
+		(uuid "6f552bb5-4035-44bf-a6a0-f5f802c47962")
 	)
 	(junction
 		(at 109.22 35.56)
@@ -1098,12 +1427,6 @@
 		(color 0 0 0 0)
 		(uuid "c8b90de8-9190-4e80-99fc-f1392c081f60")
 	)
-	(junction
-		(at 95.25 66.04)
-		(diameter 0)
-		(color 0 0 0 0)
-		(uuid "dbbd2ad1-3c00-4693-a4cc-7d1e9e24395a")
-	)
 	(junction
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 				)
 			)
@@ -2233,13 +2584,13 @@
 		(lib_id "Regulator_Switching:TPS613222ADBV")
 		(at 62.23 38.1 0)
 		(unit 1)
-		(exclude_from_sim no)
+		(exclude_from_sim yes)
 		(in_bom yes)
 		(on_board yes)
 		(dnp no)
 		(fields_autoplaced yes)
 		(uuid "cbb86ad7-2a7c-400f-84ee-934076767f74")
-		(property "Reference" "U1"
+		(property "Reference" "U5"
 			(at 62.23 27.94 0)
 			(effects
 				(font
@@ -2336,7 +2687,105 @@
 		(instances
 			(project ""
 				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396/7683adc3-3937-403f-8f34-7becfe72007f"
-					(reference "U1")
+					(reference "U5")
+					(unit 1)
+				)
+			)
+		)
+	)
+	(symbol
+		(lib_id "Simulation_SPICE:VDC")
+		(at 74.93 49.53 0)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "dc38a449-dc24-4d00-ac79-c5b32f889c29")
+		(property "Reference" "V2"
+			(at 78.74 48.1301 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Value" "5"
+			(at 78.74 50.6701 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Footprint" ""
+			(at 74.93 49.53 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "https://ngspice.sourceforge.io/docs/ngspice-html-manual/manual.xhtml#sec_Independent_Sources_for"
+			(at 74.93 49.53 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Voltage source, DC"
+			(at 74.93 49.53 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Pins" "1=+ 2=-"
+			(at 74.93 49.53 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Type" "DC"
+			(at 74.93 49.53 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Sim.Device" "V"
+			(at 74.93 49.53 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+				(hide yes)
+			)
+		)
+		(pin "2"
+			(uuid "0d79a9d6-d202-4e1c-8dea-5c62f9f6f276")
+		)
+		(pin "1"
+			(uuid "f09e29a5-f3a5-4a4e-9b2c-c71e7ed9080b")
+		)
+		(instances
+			(project ""
+				(path "/3a60b8c4-9b6a-45e3-8d5f-2fa80fee2396/7683adc3-3937-403f-8f34-7becfe72007f"
+					(reference "V2")
 					(unit 1)
 				)
 			)
diff --git a/template.kicad_wks b/template.kicad_wks
new file mode 100644
index 0000000..ed98b25
--- /dev/null
+++ b/template.kicad_wks
@@ -0,0 +1,177 @@
+(kicad_wks
+	(version 20231118)
+	(generator "pl_editor")
+	(generator_version "9.0")
+	(setup
+		(textsize 1.5 1.5)
+		(linewidth 0.15)
+		(textlinewidth 0.15)
+		(left_margin 10)
+		(right_margin 10)
+		(top_margin 10)
+		(bottom_margin 10)
+	)
+	(rect
+		(name "")
+		(start 110 34)
+		(end 2 2)
+		(comment "rect around the title block")
+	)
+	(rect
+		(name "")
+		(start 0 0 ltcorner)
+		(end 0 0)
+		(repeat 2)
+		(incrx 2)
+		(incry 2)
+	)
+	(line
+		(name "")
+		(start 50 2 ltcorner)
+		(end 50 0 ltcorner)
+		(repeat 30)
+		(incrx 50)
+	)
+	(tbtext "1"
+		(name "")
+		(pos 25 1 ltcorner)
+		(font
+			(size 1.3 1.3)
+		)
+		(repeat 100)
+		(incrx 50)
+	)
+	(line
+		(name "")
+		(start 50 2 lbcorner)
+		(end 50 0 lbcorner)
+		(repeat 30)
+		(incrx 50)
+	)
+	(tbtext "1"
+		(name "")
+		(pos 25 1 lbcorner)
+		(font
+			(size 1.3 1.3)
+		)
+		(repeat 100)
+		(incrx 50)
+	)
+	(line
+		(name "")
+		(start 0 50 ltcorner)
+		(end 2 50 ltcorner)
+		(repeat 30)
+		(incry 50)
+	)
+	(tbtext "A"
+		(name "")
+		(pos 1 25 ltcorner)
+		(font
+			(size 1.3 1.3)
+		)
+		(justify center)
+		(repeat 100)
+		(incry 50)
+	)
+	(line
+		(name "")
+		(start 0 50 rtcorner)
+		(end 2 50 rtcorner)
+		(repeat 30)
+		(incry 50)
+	)
+	(tbtext "A"
+		(name "")
+		(pos 1 25 rtcorner)
+		(font
+			(size 1.3 1.3)
+		)
+		(justify center)
+		(repeat 100)
+		(incry 50)
+	)
+	(tbtext "Date: ${ISSUE_DATE}"
+		(name "")
+		(pos 87 6.9)
+	)
+	(line
+		(name "")
+		(start 110 5.5)
+		(end 2 5.5)
+	)
+	(tbtext "${KICAD_VERSION}"
+		(name "")
+		(pos 109 4.1)
+		(comment "Kicad version")
+	)
+	(line
+		(name "")
+		(start 110 8.5)
+		(end 2 8.5)
+	)
+	(tbtext "Rev: ${REVISION}"
+		(name "")
+		(pos 24 6.9)
+		(font bold)
+	)
+	(tbtext "Size: ${PAPER}"
+		(name "")
+		(pos 109 6.9)
+		(comment "Paper format name")
+	)
+	(tbtext "Id: ${#}/${##}"
+		(name "")
+		(pos 24 4.1)
+		(comment "Sheet id")
+	)
+	(line
+		(name "")
+		(start 110 12.5)
+		(end 2 12.5)
+	)
+	(tbtext "Title: ${TITLE}"
+		(name "")
+		(pos 109 10.7)
+		(font
+			(size 2 2) bold italic)
+	)
+	(tbtext "File: ${FILENAME}"
+		(name "")
+		(pos 109 14.3)
+	)
+	(line
+		(name "")
+		(start 110 18.5)
+		(end 2 18.5)
+	)
+	(tbtext "Sheet: ${SHEETPATH}"
+		(name "")
+		(pos 109 17)
+	)
+	(tbtext "${COMPANY}"
+		(name "")
+		(pos 109 20)
+		(font bold)
+		(comment "Company name")
+	)
+	(tbtext "${COMMENT1}"
+		(name "")
+		(pos 109 30.62)
+		(font
+			(size 4.572 4.572)
+		)
+		(justify top)
+		(comment "Comment 0")
+	)
+	(line
+		(name "")
+		(start 90 8.5)
+		(end 90 5.5)
+	)
+	(line
+		(name "")
+		(start 26 8.5)
+		(end 26 2)
+	)
+)