diff --git a/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester-backups/0002-PC817-Series-PhotoCoupler-Tester-2025-10-07_195806.zip b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester-backups/0002-PC817-Series-PhotoCoupler-Tester-2025-10-07_195806.zip
new file mode 100644
index 0000000..ee9c946
Binary files /dev/null and b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester-backups/0002-PC817-Series-PhotoCoupler-Tester-2025-10-07_195806.zip differ
diff --git a/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester-backups/0002-PC817-Series-PhotoCoupler-Tester-2025-10-07_210957.zip b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester-backups/0002-PC817-Series-PhotoCoupler-Tester-2025-10-07_210957.zip
new file mode 100644
index 0000000..86e99d7
Binary files /dev/null and b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester-backups/0002-PC817-Series-PhotoCoupler-Tester-2025-10-07_210957.zip differ
diff --git a/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.kicad_pro b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.kicad_pro
index 3866ee9..2cb5b06 100644
--- a/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.kicad_pro
+++ b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.kicad_pro
@@ -372,7 +372,7 @@
     },
     "net_format_name": "",
     "page_layout_descr_file": "",
-    "plot_directory": "",
+    "plot_directory": "/home/tgohle/Desktop/git/ToGo-Lab/0002-PC817-Series-PhotoCoupler-Tester/KiCad/0002-PC817-Series-PhotoCoupler-Tester/",
     "spice_current_sheet_as_root": false,
     "spice_external_command": "spice \"%I\"",
     "spice_model_current_sheet_as_root": true,
diff --git a/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.kicad_sch b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.kicad_sch
index 2d67652..3bfa051 100644
--- a/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.kicad_sch
+++ b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.kicad_sch
@@ -6,7 +6,7 @@
 	(paper "A4")
 	(title_block
 		(title "ToGo Lab PC817 Optocoupler Tester")
-		(date "2025-10-06")
+		(date "2025-10-07")
 		(rev "#0001")
 		(company "ToGo-Lab")
 		(comment 1 " - https://togo-lab.io/")
@@ -294,6 +294,175 @@
 				)
 			)
 		)
+		(symbol "Device:LED"
+			(pin_numbers hide)
+			(pin_names
+				(offset 1.016) hide)
+			(exclude_from_sim no)
+			(in_bom yes)
+			(on_board yes)
+			(property "Reference" "D"
+				(at 0 2.54 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+				)
+			)
+			(property "Value" "LED"
+				(at 0 -2.54 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
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Description" "Light emitting diode"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "ki_keywords" "LED diode"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "ki_fp_filters" "LED* LED_SMD:* LED_THT:*"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(symbol "LED_0_1"
+				(polyline
+					(pts
+						(xy -1.27 -1.27) (xy -1.27 1.27)
+					)
+					(stroke
+						(width 0.254)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+				(polyline
+					(pts
+						(xy -1.27 0) (xy 1.27 0)
+					)
+					(stroke
+						(width 0)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+				(polyline
+					(pts
+						(xy 1.27 -1.27) (xy 1.27 1.27) (xy -1.27 0) (xy 1.27 -1.27)
+					)
+					(stroke
+						(width 0.254)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+				(polyline
+					(pts
+						(xy -3.048 -0.762) (xy -4.572 -2.286) (xy -3.81 -2.286) (xy -4.572 -2.286) (xy -4.572 -1.524)
+					)
+					(stroke
+						(width 0)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+				(polyline
+					(pts
+						(xy -1.778 -0.762) (xy -3.302 -2.286) (xy -2.54 -2.286) (xy -3.302 -2.286) (xy -3.302 -1.524)
+					)
+					(stroke
+						(width 0)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+			)
+			(symbol "LED_1_1"
+				(pin passive line
+					(at -3.81 0 0)
+					(length 2.54)
+					(name "K"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+					(number "1"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+				)
+				(pin passive line
+					(at 3.81 0 180)
+					(length 2.54)
+					(name "A"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+					(number "2"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+				)
+			)
+		)
 		(symbol "Device:R"
 			(pin_numbers hide)
 			(pin_names
@@ -1010,6 +1179,190 @@
 				)
 			)
 		)
+		(symbol "Switch:SW_Push_Dual_x2"
+			(pin_names
+				(offset 1.016) hide)
+			(exclude_from_sim no)
+			(in_bom yes)
+			(on_board yes)
+			(property "Reference" "SW"
+				(at 1.27 2.54 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(justify left)
+				)
+			)
+			(property "Value" "SW_Push_Dual_x2"
+				(at 0 -1.524 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+				)
+			)
+			(property "Footprint" ""
+				(at 0 5.08 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Datasheet" "~"
+				(at 0 5.08 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "Description" "Push button switch, generic, separate symbols, four pins"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(property "ki_keywords" "switch normally-open pushbutton push-button"
+				(at 0 0 0)
+				(effects
+					(font
+						(size 1.27 1.27)
+					)
+					(hide yes)
+				)
+			)
+			(symbol "SW_Push_Dual_x2_0_1"
+				(circle
+					(center -2.032 0)
+					(radius 0.508)
+					(stroke
+						(width 0)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+				(polyline
+					(pts
+						(xy 0 1.27) (xy 0 3.048)
+					)
+					(stroke
+						(width 0)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+				(polyline
+					(pts
+						(xy 2.54 1.27) (xy -2.54 1.27)
+					)
+					(stroke
+						(width 0)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+				(circle
+					(center 2.032 0)
+					(radius 0.508)
+					(stroke
+						(width 0)
+						(type default)
+					)
+					(fill
+						(type none)
+					)
+				)
+			)
+			(symbol "SW_Push_Dual_x2_1_1"
+				(pin passive line
+					(at -5.08 0 0)
+					(length 2.54)
+					(name "C"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+					(number "1"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+				)
+				(pin passive line
+					(at 5.08 0 180)
+					(length 2.54)
+					(name "D"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+					(number "2"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+				)
+			)
+			(symbol "SW_Push_Dual_x2_2_1"
+				(pin passive line
+					(at -5.08 0 0)
+					(length 2.54)
+					(name "C"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+					(number "3"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+				)
+				(pin passive line
+					(at 5.08 0 180)
+					(length 2.54)
+					(name "D"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+					(number "4"
+						(effects
+							(font
+								(size 1.27 1.27)
+							)
+						)
+					)
+				)
+			)
+		)
 		(symbol "power:GND"
 			(power)
 			(pin_numbers hide)
@@ -1335,6 +1688,12 @@
 		(color 0 0 0 0)
 		(uuid "15538bf0-d9b3-47a7-a871-463e67ead6cb")
 	)
+	(junction
+		(at 73.66 63.5)
+		(diameter 0)
+		(color 0 0 0 0)
+		(uuid "1a242996-e7c4-4849-91fe-a87f8cbb2c69")
+	)
 	(junction
 		(at 224.79 82.55)
 		(diameter 0)
@@ -1347,6 +1706,12 @@
 		(color 0 0 0 0)
 		(uuid "9d929fe8-c3d5-4cb4-a9f0-449e7c7a665c")
 	)
+	(junction
+		(at 73.66 107.95)
+		(diameter 0)
+		(color 0 0 0 0)
+		(uuid "a0bce9b5-a61b-4409-aa89-be7e4273243a")
+	)
 	(junction
 		(at 224.79 58.42)
 		(diameter 0)
@@ -1363,6 +1728,26 @@
 		)
 		(uuid "074ba95c-16ac-425b-a85f-a68f6cdf9ce9")
 	)
+	(wire
+		(pts
+			(xy 66.04 100.33) (xy 63.5 100.33)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "07e3c6f4-9ade-40a9-b98b-30c35f0401f5")
+	)
+	(wire
+		(pts
+			(xy 81.28 95.25) (xy 83.82 95.25)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "1f507988-a504-4ed5-9e2b-124d8a979748")
+	)
 	(wire
 		(pts
 			(xy 218.44 69.85) (xy 218.44 72.39)
@@ -1383,6 +1768,16 @@
 		)
 		(uuid "287480bd-3a4c-4040-8109-ae8220a535ac")
 	)
+	(wire
+		(pts
+			(xy 83.82 100.33) (xy 81.28 100.33)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "2bbe2dac-f1e3-4944-8d99-8bbf0cc1480f")
+	)
 	(wire
 		(pts
 			(xy 160.02 181.61) (xy 160.02 190.5)
@@ -1393,6 +1788,16 @@
 		)
 		(uuid "32507d7c-0347-44b0-ae22-84857193e5fe")
 	)
+	(wire
+		(pts
+			(xy 83.82 76.2) (xy 83.82 81.28)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "389927f1-9cc2-42c4-9394-42445e077f77")
+	)
 	(wire
 		(pts
 			(xy 212.09 69.85) (xy 212.09 72.39)
@@ -1423,6 +1828,26 @@
 		)
 		(uuid "48676b35-e989-430a-8b9d-8c5722b7588a")
 	)
+	(wire
+		(pts
+			(xy 63.5 66.04) (xy 63.5 63.5)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "4de805a4-d451-42ef-a8ed-2d2276b935ff")
+	)
+	(wire
+		(pts
+			(xy 83.82 63.5) (xy 83.82 68.58)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "4f801228-89c0-45e0-a438-1ca4b26424bf")
+	)
 	(wire
 		(pts
 			(xy 224.79 58.42) (xy 237.49 58.42)
@@ -1433,6 +1858,16 @@
 		)
 		(uuid "5476d621-0b98-4bda-9277-51c620ba09b3")
 	)
+	(wire
+		(pts
+			(xy 63.5 107.95) (xy 73.66 107.95)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "68f5cf12-4d2a-4656-904f-7759de10ca03")
+	)
 	(wire
 		(pts
 			(xy 212.09 82.55) (xy 212.09 95.25)
@@ -1473,6 +1908,16 @@
 		)
 		(uuid "871dec5b-2ba2-4771-a5c0-bf669c48c956")
 	)
+	(wire
+		(pts
+			(xy 83.82 107.95) (xy 83.82 100.33)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "8826e67b-3387-4c16-9ac4-811b9ff70312")
+	)
 	(wire
 		(pts
 			(xy 212.09 62.23) (xy 212.09 58.42)
@@ -1513,6 +1958,16 @@
 		)
 		(uuid "9c282b89-7e28-41b9-a1b5-3e98559ed2ac")
 	)
+	(wire
+		(pts
+			(xy 63.5 76.2) (xy 63.5 81.28)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "9df8206f-4620-48c0-b902-9b00fcb4a11f")
+	)
 	(polyline
 		(pts
 			(xy 139.7 12.7) (xy 139.7 165.1)
@@ -1523,6 +1978,16 @@
 		)
 		(uuid "a02b094c-547b-4fa9-9b39-6cf75b019e15")
 	)
+	(wire
+		(pts
+			(xy 83.82 88.9) (xy 83.82 95.25)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "a71fff89-5797-4925-a0eb-7e55cab578af")
+	)
 	(wire
 		(pts
 			(xy 224.79 77.47) (xy 224.79 82.55)
@@ -1553,6 +2018,16 @@
 		)
 		(uuid "b36e3ea4-c2fd-4256-bf0a-d0198990973e")
 	)
+	(wire
+		(pts
+			(xy 63.5 88.9) (xy 63.5 95.25)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "b7baf292-5129-45a3-ba72-2bc02bc43c7e")
+	)
 	(wire
 		(pts
 			(xy 205.74 95.25) (xy 212.09 95.25)
@@ -1563,6 +2038,16 @@
 		)
 		(uuid "b98c42d9-7b69-40c3-b887-e64c7461fc3f")
 	)
+	(wire
+		(pts
+			(xy 73.66 63.5) (xy 83.82 63.5)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "c82c1aef-2ac4-4e6a-bedb-4faa6a5c2ba8")
+	)
 	(wire
 		(pts
 			(xy 186.69 99.06) (xy 186.69 100.33)
@@ -1583,6 +2068,16 @@
 		)
 		(uuid "d2843c4d-f9a1-4354-b689-5dd656708e3a")
 	)
+	(wire
+		(pts
+			(xy 63.5 63.5) (xy 73.66 63.5)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "d7a6e5ab-86ff-407b-8150-f4fcf9107834")
+	)
 	(wire
 		(pts
 			(xy 212.09 82.55) (xy 218.44 82.55)
@@ -1593,6 +2088,16 @@
 		)
 		(uuid "d7e8c54b-59b0-43fa-9ce2-a7bcc12d3cfb")
 	)
+	(wire
+		(pts
+			(xy 73.66 107.95) (xy 83.82 107.95)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "d8e9e657-5036-45e8-b826-8c28b802a39c")
+	)
 	(wire
 		(pts
 			(xy 182.88 96.52) (xy 186.69 96.52)
@@ -1633,6 +2138,26 @@
 		)
 		(uuid "e3c1b511-fe26-48af-8da5-650fc1b26888")
 	)
+	(wire
+		(pts
+			(xy 63.5 95.25) (xy 66.04 95.25)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "e923f430-816b-4934-9a12-74b798304aad")
+	)
+	(wire
+		(pts
+			(xy 63.5 100.33) (xy 63.5 107.95)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "efe91dda-a09a-4dae-a415-63fdb7cd9e67")
+	)
 	(wire
 		(pts
 			(xy 170.18 181.61) (xy 170.18 190.5)
@@ -1685,9 +2210,30 @@
 		)
 		(uuid "39722394-a75c-42d9-8995-4dfc1039fde6")
 	)
+	(text "Both circuits are built on the same strip board."
+		(exclude_from_sim no)
+		(at 140.97 25.4 0)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+		)
+		(uuid "4943b4c1-001f-4a7e-b4db-0f98bf452d62")
+	)
+	(text "using 2x 2 Connectors\nso *817 can easaly plugged in"
+		(exclude_from_sim no)
+		(at 87.63 98.044 0)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify left)
+		)
+		(uuid "60ae04c4-c589-48a4-b1bb-fc0ca30de1b3")
+	)
 	(text "Circuit for\nManual On/Off Check"
 		(exclude_from_sim no)
-		(at 76.454 23.368 0)
+		(at 75.692 25.654 0)
 		(effects
 			(font
 				(size 1.27 1.27)
@@ -1695,9 +2241,20 @@
 		)
 		(uuid "65f41362-32c0-45ce-86e1-b1638e17a7c0")
 	)
-	(text "Circuit for \nParameter Check (DataSheet)"
+	(text "using 2x 2 Connectors\nso *817 can easaly plugged in"
 		(exclude_from_sim no)
-		(at 210.312 23.876 0)
+		(at 186.182 109.728 0)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify left)
+		)
+		(uuid "9080c54a-08e2-44e5-85d7-7fbaa7d7b26c")
+	)
+	(text "Circuit for \nParameter Check\n(as described by DataSheet)"
+		(exclude_from_sim no)
+		(at 210.312 25.4 0)
 		(effects
 			(font
 				(size 1.27 1.27)
@@ -1705,6 +2262,76 @@
 		)
 		(uuid "ecafbec1-d7e3-4590-9e9c-c71d56df164c")
 	)
+	(symbol
+		(lib_id "Device:LED")
+		(at 83.82 85.09 90)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "011cdf51-f071-45f5-b236-a36b45036fff")
+		(property "Reference" "D1"
+			(at 87.63 85.4074 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(property "Value" "LED"
+			(at 87.63 87.9474 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(property "Footprint" "LED_THT:LED_D5.0mm"
+			(at 83.82 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "~"
+			(at 83.82 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Light emitting diode"
+			(at 83.82 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "1"
+			(uuid "1656931f-c042-4378-85a1-6a7eb8ea383c")
+		)
+		(pin "2"
+			(uuid "abc8c974-14f8-4f49-bcae-9481c1bac34b")
+		)
+		(instances
+			(project ""
+				(path "/febb417f-30ea-4952-b0ab-2e39281940f4"
+					(reference "D1")
+					(unit 1)
+				)
+			)
+		)
+	)
 	(symbol
 		(lib_id "power:VCC")
 		(at 170.18 190.5 180)
@@ -1771,9 +2398,78 @@
 			)
 		)
 	)
+	(symbol
+		(lib_id "Device:R")
+		(at 83.82 72.39 0)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(uuid "1dd065c9-b04b-467c-8239-4c6bdb06270e")
+		(property "Reference" "R2"
+			(at 81.28 74.676 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Value" "~330"
+			(at 83.82 74.168 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Footprint" "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal"
+			(at 82.042 72.39 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "~"
+			(at 83.82 72.39 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Resistor"
+			(at 83.82 72.39 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "1"
+			(uuid "ff0d773b-5b20-4fef-b741-05a311037395")
+		)
+		(pin "2"
+			(uuid "70ae8efd-f7be-485d-9226-2210bfd0034a")
+		)
+		(instances
+			(project "0002-PC817-Series-PhotoCoupler-Tester"
+				(path "/febb417f-30ea-4952-b0ab-2e39281940f4"
+					(reference "R2")
+					(unit 1)
+				)
+			)
+		)
+	)
 	(symbol
 		(lib_id "Isolator:EL817")
-		(at 77.47 54.61 0)
+		(at 73.66 97.79 0)
 		(unit 1)
 		(exclude_from_sim no)
 		(in_bom yes)
@@ -1782,7 +2478,7 @@
 		(fields_autoplaced yes)
 		(uuid "1fd8e62a-fee2-4ddc-b6ca-ca104583badb")
 		(property "Reference" "U1"
-			(at 77.47 45.72 0)
+			(at 73.66 88.9 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -1790,7 +2486,7 @@
 			)
 		)
 		(property "Value" "*817"
-			(at 77.47 48.26 0)
+			(at 73.66 91.44 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -1798,7 +2494,7 @@
 			)
 		)
 		(property "Footprint" "Package_DIP:DIP-4_W7.62mm"
-			(at 72.39 59.69 0)
+			(at 68.58 102.87 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -1809,7 +2505,7 @@
 			)
 		)
 		(property "Datasheet" "http://www.everlight.com/file/ProductFile/EL817.pdf"
-			(at 77.47 54.61 0)
+			(at 73.66 97.79 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -1819,7 +2515,7 @@
 			)
 		)
 		(property "Description" "DC Optocoupler, Vce 35V, DIP-4"
-			(at 77.47 54.61 0)
+			(at 73.66 97.79 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -1848,6 +2544,82 @@
 			)
 		)
 	)
+	(symbol
+		(lib_id "Switch:SW_Push_Dual_x2")
+		(at 63.5 71.12 90)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "2591385f-a7aa-4a8a-a3e4-f2d2a109ad89")
+		(property "Reference" "SW1"
+			(at 64.77 71.1199 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+			)
+		)
+		(property "Value" "SW_Push_Dual_x2"
+			(at 58.42 71.12 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Footprint" "Button_Switch_THT:SW_PUSH-12mm"
+			(at 58.42 71.12 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "~"
+			(at 58.42 71.12 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Push button switch, generic, separate symbols, four pins"
+			(at 63.5 71.12 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "2"
+			(uuid "fdd01282-73a9-41f5-8994-f1015c37f8fc")
+		)
+		(pin "1"
+			(uuid "738bc237-1600-459b-b357-b72d9750d334")
+		)
+		(pin "3"
+			(uuid "42f61ae2-3404-4287-b687-5c1805a605b3")
+		)
+		(pin "4"
+			(uuid "af37a255-6931-4429-a1db-95bf424ff7ac")
+		)
+		(instances
+			(project ""
+				(path "/febb417f-30ea-4952-b0ab-2e39281940f4"
+					(reference "SW1")
+					(unit 1)
+				)
+			)
+		)
+	)
 	(symbol
 		(lib_id "Connector:Conn_01x01_Socket")
 		(at 242.57 82.55 0)
@@ -2728,6 +3500,75 @@
 			)
 		)
 	)
+	(symbol
+		(lib_id "Device:R")
+		(at 63.5 85.09 0)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(uuid "c60b987b-765b-4701-b093-e6beb4c587ad")
+		(property "Reference" "R1"
+			(at 60.96 87.376 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Value" "~330"
+			(at 63.5 86.868 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Footprint" "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal"
+			(at 61.722 85.09 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "~"
+			(at 63.5 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Resistor"
+			(at 63.5 85.09 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "1"
+			(uuid "8c842aa0-68e6-45be-9001-82923f885458")
+		)
+		(pin "2"
+			(uuid "c02efa98-d63a-4e02-8e8d-8fb17f81683e")
+		)
+		(instances
+			(project "0002-PC817-Series-PhotoCoupler-Tester"
+				(path "/febb417f-30ea-4952-b0ab-2e39281940f4"
+					(reference "R1")
+					(unit 1)
+				)
+			)
+		)
+	)
 	(symbol
 		(lib_id "Jumper:Jumper_2_Small_Bridged")
 		(at 212.09 74.93 90)
@@ -2864,6 +3705,138 @@
 			)
 		)
 	)
+	(symbol
+		(lib_id "power:VCC")
+		(at 73.66 63.5 0)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "ecd4c777-51d0-4b3c-89bb-38d65fb07260")
+		(property "Reference" "#PWR6"
+			(at 73.66 67.31 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Value" "VCC"
+			(at 73.66 58.42 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Footprint" ""
+			(at 73.66 63.5 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" ""
+			(at 73.66 63.5 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Power symbol creates a global label with name \"VCC\""
+			(at 73.66 63.5 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "1"
+			(uuid "f5f10bad-a1ea-46d9-b1d5-1a7105052e03")
+		)
+		(instances
+			(project ""
+				(path "/febb417f-30ea-4952-b0ab-2e39281940f4"
+					(reference "#PWR6")
+					(unit 1)
+				)
+			)
+		)
+	)
+	(symbol
+		(lib_id "power:GND")
+		(at 73.66 107.95 0)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "f77028de-2d06-44ce-b395-1357b4edac1e")
+		(property "Reference" "#PWR7"
+			(at 73.66 114.3 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Value" "GND"
+			(at 73.66 113.03 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+			)
+		)
+		(property "Footprint" ""
+			(at 73.66 107.95 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" ""
+			(at 73.66 107.95 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Power symbol creates a global label with name \"GND\" , ground"
+			(at 73.66 107.95 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "1"
+			(uuid "6e1f3b13-cb31-4850-a699-2ed4af301be5")
+		)
+		(instances
+			(project ""
+				(path "/febb417f-30ea-4952-b0ab-2e39281940f4"
+					(reference "#PWR7")
+					(unit 1)
+				)
+			)
+		)
+	)
 	(symbol
 		(lib_id "Isolator:EL817")
 		(at 198.12 97.79 0)
diff --git a/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.pdf b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.pdf
new file mode 100644
index 0000000..2e7c32a
Binary files /dev/null and b/KiCad/0002-PC817-Series-PhotoCoupler-Tester/0002-PC817-Series-PhotoCoupler-Tester.pdf differ
diff --git a/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.BAK b/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.BAK
new file mode 100644
index 0000000..d28d73f
Binary files /dev/null and b/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.BAK differ
diff --git a/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.OLD b/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.OLD
new file mode 100644
index 0000000..fe714de
Binary files /dev/null and b/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.OLD differ
diff --git a/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.jpg b/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.jpg
new file mode 100644
index 0000000..b9b5e08
Binary files /dev/null and b/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.jpg differ
diff --git a/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.lm4 b/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.lm4
new file mode 100644
index 0000000..2f6e1e4
Binary files /dev/null and b/StripBoard/0002-PC817-Series-PhotoCoupler-Tester_SB.lm4 differ