pcb: power: Add `PWR_FLAG` symbols

This resolves ERC issues. The ERC complains that an power input is not
fed by a power output if there is a component like a ferrite bead or 0
Ohm resistor between the two.

The `PWR_FLAG` tells the ERC that it was explicitly checked that this is
not a mistake.

1 files changed, 396 insertions, 47 deletions

diff --git a/pcb/iot-contact.kicad_sch b/pcb/iot-contact.kicad_sch
index adfa39b..7536bd6 100644
--- a/pcb/iot-contact.kicad_sch
+++ b/pcb/iot-contact.kicad_sch
@@ -4702,6 +4702,107 @@
 			)
 			(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
+						(size 1.27 1.27)
+					)
+					(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)
+		)
 	)
 	(junction
 		(at 120.65 148.59)
@@ -4710,7 +4811,7 @@
 		(uuid "189c037d-87e6-4632-a2b6-8730223eefc5")
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@@ -4722,19 +4823,37 @@
 		(uuid "312e89d2-fdb5-496d-bf16-ed926f9db3fb")
 	)
 	(junction
+		(at 242.57 78.74)
+		(diameter 0)
+		(color 0 0 0 0)
+		(uuid "33b356df-d048-4df0-96e4-8c1ea206c9dc")
+	)
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+		(at 250.19 114.3)
+		(diameter 0)
+		(color 0 0 0 0)
+		(uuid "470e8419-e3be-4ba0-aea1-7189d12831dc")
+	)
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 		(at 158.75 139.7)
 		(diameter 0)
 		(color 0 0 0 0)
 		(uuid "724f0699-6e99-4c5f-a95b-4fb06bb9adc0")
 	)
 	(junction
+		(at 252.73 88.9)
+		(diameter 0)
+		(color 0 0 0 0)
+		(uuid "c1071eb4-1ac7-4082-ba94-41a2f34f1aad")
+	)
+	(junction
 		(at 241.3 135.89)
 		(diameter 0)
 		(color 0 0 0 0)
 		(uuid "c9c17fd6-022b-441f-ad8f-c18a54dfa220")
 	)
 	(junction
-		(at 252.73 85.09)
+		(at 252.73 93.98)
 		(diameter 0)
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@@ -4803,7 +4922,7 @@
 	)
 	(wire
 		(pts
-			(xy 234.95 99.06) (xy 257.81 99.06)
+			(xy 234.95 106.68) (xy 257.81 106.68)
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 			(width 0)
@@ -4813,7 +4932,7 @@
 	)
 	(wire
 		(pts
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@@ -5143,7 +5262,7 @@
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 	(wire
 		(pts
-			(xy 252.73 85.09) (xy 257.81 85.09)
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 		)
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 			(width 0)
@@ -5173,6 +5292,16 @@
 	)
 	(wire
 		(pts
+			(xy 250.19 114.3) (xy 250.19 111.76)
+		)
+		(stroke
+			(width 0)
+			(type default)
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+	)
+	(wire
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 			(xy 63.5 92.71) (xy 87.63 92.71)
 		)
 		(stroke
@@ -5193,7 +5322,7 @@
 	)
 	(wire
 		(pts
-			(xy 250.19 104.14) (xy 250.19 90.17)
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 			(width 0)
@@ -5213,7 +5342,7 @@
 	)
 	(wire
 		(pts
-			(xy 252.73 85.09) (xy 252.73 96.52)
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@@ -5363,7 +5492,7 @@
 	)
 	(wire
 		(pts
-			(xy 250.19 104.14) (xy 257.81 104.14)
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@@ -5373,7 +5502,7 @@
 	)
 	(wire
 		(pts
-			(xy 250.19 107.95) (xy 250.19 104.14)
+			(xy 250.19 115.57) (xy 250.19 114.3)
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@@ -5413,7 +5542,7 @@
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 	(wire
 		(pts
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@@ -5423,7 +5552,7 @@
 	)
 	(wire
 		(pts
-			(xy 252.73 77.47) (xy 252.73 85.09)
+			(xy 252.73 87.63) (xy 252.73 88.9)
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@@ -5443,7 +5572,7 @@
 	)
 	(wire
 		(pts
-			(xy 242.57 86.36) (xy 242.57 87.63)
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@@ -5513,7 +5642,7 @@
 	)
 	(wire
 		(pts
-			(xy 234.95 101.6) (xy 257.81 101.6)
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@@ -5563,7 +5692,17 @@
 	)
 	(wire
 		(pts
-			(xy 242.57 87.63) (xy 257.81 87.63)
+			(xy 242.57 78.74) (xy 242.57 87.63)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "eadf392b-a0a3-4f13-8af7-e892c3f05d9d")
+	)
+	(wire
+		(pts
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 		)
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 			(width 0)
@@ -5603,6 +5742,16 @@
 	)
 	(wire
 		(pts
+			(xy 252.73 88.9) (xy 252.73 93.98)
+		)
+		(stroke
+			(width 0)
+			(type default)
+		)
+		(uuid "f9f4d83f-33ca-4e7c-b480-a28225361a0d")
+	)
+	(wire
+		(pts
 			(xy 63.5 85.09) (xy 87.63 85.09)
 		)
 		(stroke
@@ -5810,7 +5959,7 @@
 	)
 	(symbol
 		(lib_id "Connector:Conn_01x04_Socket")
-		(at 262.89 99.06 0)
+		(at 262.89 106.68 0)
 		(unit 1)
 		(exclude_from_sim no)
 		(in_bom yes)
@@ -5819,7 +5968,7 @@
 		(fields_autoplaced yes)
 		(uuid "2d769173-ff82-40e1-951a-2dc5224e05e0")
 		(property "Reference" "J7"
-			(at 264.16 99.0599 0)
+			(at 264.16 106.6799 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -5828,7 +5977,7 @@
 			)
 		)
 		(property "Value" "Conn_01x04_Socket"
-			(at 264.16 101.5999 0)
+			(at 264.16 109.2199 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -5837,7 +5986,7 @@
 			)
 		)
 		(property "Footprint" "TerminalBlock_WAGO:TerminalBlock_WAGO_236-404_1x04_P5.00mm_45Degree"
-			(at 262.89 99.06 0)
+			(at 262.89 106.68 0)
 			(effects
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@@ -5846,7 +5995,7 @@
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 		(property "Datasheet" "~"
-			(at 262.89 99.06 0)
+			(at 262.89 106.68 0)
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@@ -5855,7 +6004,7 @@
 			)
 		)
 		(property "Description" "Generic connector, single row, 01x04, script generated"
-			(at 262.89 99.06 0)
+			(at 262.89 106.68 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -6126,7 +6275,7 @@
 	)
 	(symbol
 		(lib_id "Connector:Conn_01x03_Socket")
-		(at 262.89 87.63 0)
+		(at 262.89 96.52 0)
 		(unit 1)
 		(exclude_from_sim no)
 		(in_bom yes)
@@ -6135,7 +6284,7 @@
 		(fields_autoplaced yes)
 		(uuid "5f046492-30cd-4464-8b76-48d4e3598436")
 		(property "Reference" "J6"
-			(at 264.16 86.3599 0)
+			(at 264.16 95.2499 0)
 			(effects
 				(font
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@@ -6144,7 +6293,7 @@
 			)
 		)
 		(property "Value" "Conn_01x03_Socket"
-			(at 264.16 88.8999 0)
+			(at 264.16 97.7899 0)
 			(effects
 				(font
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@@ -6153,7 +6302,7 @@
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 		(property "Footprint" "TerminalBlock_WAGO:TerminalBlock_WAGO_236-403_1x03_P5.00mm_45Degree"
-			(at 262.89 87.63 0)
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@@ -6162,7 +6311,7 @@
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@@ -6171,7 +6320,7 @@
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 		(property "Description" "Generic connector, single row, 01x03, script generated"
-			(at 262.89 87.63 0)
+			(at 262.89 96.52 0)
 			(effects
 				(font
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@@ -6198,17 +6347,83 @@
 		)
 	)
 	(symbol
-		(lib_id "power:NEUT")
-		(at 252.73 77.47 0)
+		(lib_id "power:PWR_FLAG")
+		(at 250.19 114.3 270)
 		(unit 1)
 		(exclude_from_sim no)
 		(in_bom yes)
 		(on_board yes)
 		(dnp no)
 		(fields_autoplaced yes)
+		(uuid "6710a893-5db1-4a58-925d-b3198a3c412d")
+		(property "Reference" "#FLG05"
+			(at 252.095 114.3 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Value" "PWR_FLAG"
+			(at 254 114.2999 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Footprint" ""
+			(at 250.19 114.3 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "~"
+			(at 250.19 114.3 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Special symbol for telling ERC where power comes from"
+			(at 250.19 114.3 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(pin "1"
+			(uuid "f1b3e437-1a13-4a59-a248-fbb182d33a55")
+		)
+		(instances
+			(project ""
+				(path "/5defd195-0277-4d04-9f5f-69e505c9845c"
+					(reference "#FLG05")
+					(unit 1)
+				)
+			)
+		)
+	)
+	(symbol
+		(lib_id "power:NEUT")
+		(at 252.73 87.63 0)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
 		(uuid "790d613d-7305-444d-b47e-55f972800e63")
 		(property "Reference" "#PWR011"
-			(at 252.73 81.28 0)
+			(at 252.73 91.44 0)
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@@ -6217,7 +6432,7 @@
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-			(at 252.73 72.39 0)
+			(at 252.73 82.55 0)
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@@ -6225,7 +6440,7 @@
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@@ -6234,7 +6449,7 @@
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+			(at 252.73 87.63 0)
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@@ -6243,7 +6458,7 @@
 			)
 		)
 		(property "Description" "Power symbol creates a global label with name \"NEUT\""
-			(at 252.73 77.47 0)
+			(at 252.73 87.63 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -6374,8 +6589,75 @@
 		)
 	)
 	(symbol
+		(lib_id "power:PWR_FLAG")
+		(at 252.73 88.9 270)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "7bc18d21-1fe3-4c78-9861-a1c74420544b")
+		(property "Reference" "#FLG07"
+			(at 254.635 88.9 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Value" "PWR_FLAG"
+			(at 256.54 88.8999 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Footprint" ""
+			(at 252.73 88.9 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "~"
+			(at 252.73 88.9 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Special symbol for telling ERC where power comes from"
+			(at 252.73 88.9 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
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+		(pin "1"
+			(uuid "1e9dd68b-292b-4bb8-8082-d9799361d0be")
+		)
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+			(project "iot-contact"
+				(path "/5defd195-0277-4d04-9f5f-69e505c9845c"
+					(reference "#FLG07")
+					(unit 1)
+				)
+			)
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 		(lib_id "Device:Fuse")
-		(at 242.57 82.55 0)
+		(at 242.57 91.44 0)
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@@ -6420,7 +6702,7 @@
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 			(effects
 				(font
 					(size 1.27 1.27)
@@ -6511,6 +6793,73 @@
 		)
 	)
 	(symbol
+		(lib_id "power:PWR_FLAG")
+		(at 242.57 78.74 270)
+		(unit 1)
+		(exclude_from_sim no)
+		(in_bom yes)
+		(on_board yes)
+		(dnp no)
+		(fields_autoplaced yes)
+		(uuid "877e63d9-ddaa-468b-b366-3162330a49e1")
+		(property "Reference" "#FLG06"
+			(at 244.475 78.74 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Value" "PWR_FLAG"
+			(at 246.38 78.7399 90)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+			)
+		)
+		(property "Footprint" ""
+			(at 242.57 78.74 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Datasheet" "~"
+			(at 242.57 78.74 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(hide yes)
+			)
+		)
+		(property "Description" "Special symbol for telling ERC where power comes from"
+			(at 242.57 78.74 0)
+			(effects
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+				)
+				(hide yes)
+			)
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+		(pin "1"
+			(uuid "ba4cccc6-25c1-4411-9a53-05ab52210588")
+		)
+		(instances
+			(project "iot-contact"
+				(path "/5defd195-0277-4d04-9f5f-69e505c9845c"
+					(reference "#FLG06")
+					(unit 1)
+				)
+			)
+		)
+	)
+	(symbol
 		(lib_id "power:GND")
 		(at 120.65 154.94 0)
 		(unit 1)
@@ -6845,7 +7194,7 @@
 	)
 	(symbol
 		(lib_id "power:Earth_Protective")
-		(at 250.19 107.95 0)
+		(at 250.19 115.57 0)
 		(unit 1)
 		(exclude_from_sim no)
 		(in_bom yes)
@@ -6854,7 +7203,7 @@
 		(fields_autoplaced yes)
 		(uuid "c2da697b-255a-4bcc-aae8-d7ba232f44aa")
 		(property "Reference" "#PWR010"
-			(at 250.19 118.11 0)
+			(at 250.19 125.73 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -6863,7 +7212,7 @@
 			)
 		)
 		(property "Value" "Earth_Protective"
-			(at 250.19 116.84 0)
+			(at 250.19 124.46 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -6871,7 +7220,7 @@
 			)
 		)
 		(property "Footprint" ""
-			(at 250.19 110.49 0)
+			(at 250.19 118.11 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -6880,7 +7229,7 @@
 			)
 		)
 		(property "Datasheet" "~"
-			(at 250.19 110.49 0)
+			(at 250.19 118.11 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -6889,7 +7238,7 @@
 			)
 		)
 		(property "Description" "Power symbol creates a global label with name \"Earth_Protective\""
-			(at 250.19 107.95 0)
+			(at 250.19 115.57 0)
 			(effects
 				(font
 					(size 1.27 1.27)
@@ -7728,7 +8077,7 @@
 			)
 		)
 		(pin "MOT_LINE_DOWN" bidirectional
-			(at 234.95 101.6 0)
+			(at 234.95 109.22 0)
 			(uuid "24c4fdf7-d176-4e0b-9566-7f88a8ec3649")
 			(effects
 				(font
@@ -7738,7 +8087,7 @@
 			)
 		)
 		(pin "MOT_LINE_UP" bidirectional
-			(at 234.95 99.06 0)
+			(at 234.95 106.68 0)
 			(uuid "09e616f6-b885-40bf-9b2d-86e536d32432")
 			(effects
 				(font