hardware: More schematics ERC fixes, add a remark about USB isolation.

hackamp/hardware/bluetooth.kicad_sch

         )
       )
     )
-    (symbol "power:+1V8" (power) (pin_names (offset 0)) (in_bom yes) (on_board yes)
+    (symbol "power:+3V3" (power) (pin_names (offset 0)) (in_bom yes) (on_board yes)
       (property "Reference" "#PWR" (id 0) (at 0 -3.81 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (property "Value" "+1V8" (id 1) (at 0 3.556 0)
+      (property "Value" "+3V3" (id 1) (at 0 3.556 0)
         (effects (font (size 1.27 1.27)))
       )
       (property "Footprint" "" (id 2) (at 0 0 0)
       (property "ki_keywords" "power-flag" (id 4) (at 0 0 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (property "ki_description" "Power symbol creates a global label with name \"+1V8\"" (id 5) (at 0 0 0)
+      (property "ki_description" "Power symbol creates a global label with name \"+3V3\"" (id 5) (at 0 0 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (symbol "+1V8_0_1"
+      (symbol "+3V3_0_1"
         (polyline
           (pts
             (xy -0.762 1.27)
           (stroke (width 0)) (fill (type none))
         )
       )
-      (symbol "+1V8_1_1"
+      (symbol "+3V3_1_1"
         (pin power_in line (at 0 0 90) (length 0) hide
-          (name "+1V8" (effects (font (size 1.27 1.27))))
+          (name "+3V3" (effects (font (size 1.27 1.27))))
           (number "1" (effects (font (size 1.27 1.27))))
         )
       )
     )
-    (symbol "power:+3V3" (power) (pin_names (offset 0)) (in_bom yes) (on_board yes)
-      (property "Reference" "#PWR" (id 0) (at 0 -3.81 0)
+    (symbol "power:GND" (power) (pin_names (offset 0)) (in_bom yes) (on_board yes)
+      (property "Reference" "#PWR" (id 0) (at 0 -6.35 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (property "Value" "+3V3" (id 1) (at 0 3.556 0)
+      (property "Value" "GND" (id 1) (at 0 -3.81 0)
         (effects (font (size 1.27 1.27)))
       )
       (property "Footprint" "" (id 2) (at 0 0 0)
       (property "ki_keywords" "power-flag" (id 4) (at 0 0 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (property "ki_description" "Power symbol creates a global label with name \"+3V3\"" (id 5) (at 0 0 0)
+      (property "ki_description" "Power symbol creates a global label with name \"GND\" , ground" (id 5) (at 0 0 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (symbol "+3V3_0_1"
-        (polyline
-          (pts
-            (xy -0.762 1.27)
-            (xy 0 2.54)
-          )
-          (stroke (width 0)) (fill (type none))
-        )
+      (symbol "GND_0_1"
         (polyline
           (pts
             (xy 0 0)
-            (xy 0 2.54)
-          )
-          (stroke (width 0)) (fill (type none))
-        )
-        (polyline
-          (pts
-            (xy 0 2.54)
-            (xy 0.762 1.27)
+            (xy 0 -1.27)
+            (xy 1.27 -1.27)
+            (xy 0 -2.54)
+            (xy -1.27 -1.27)
+            (xy 0 -1.27)
           )
           (stroke (width 0)) (fill (type none))
         )
       )
-      (symbol "+3V3_1_1"
-        (pin power_in line (at 0 0 90) (length 0) hide
-          (name "+3V3" (effects (font (size 1.27 1.27))))
+      (symbol "GND_1_1"
+        (pin power_in line (at 0 0 270) (length 0) hide
+          (name "GND" (effects (font (size 1.27 1.27))))
           (number "1" (effects (font (size 1.27 1.27))))
         )
       )
     )
-    (symbol "power:GND" (power) (pin_names (offset 0)) (in_bom yes) (on_board yes)
-      (property "Reference" "#PWR" (id 0) (at 0 -6.35 0)
+    (symbol "power:PWR_FLAG" (power) (pin_numbers hide) (pin_names (offset 0) hide) (in_bom yes) (on_board yes)
+      (property "Reference" "#FLG" (id 0) (at 0 1.905 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (property "Value" "GND" (id 1) (at 0 -3.81 0)
+      (property "Value" "PWR_FLAG" (id 1) (at 0 3.81 0)
         (effects (font (size 1.27 1.27)))
       )
       (property "Footprint" "" (id 2) (at 0 0 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (property "Datasheet" "" (id 3) (at 0 0 0)
+      (property "Datasheet" "~" (id 3) (at 0 0 0)
         (effects (font (size 1.27 1.27)) hide)
       )
       (property "ki_keywords" "power-flag" (id 4) (at 0 0 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (property "ki_description" "Power symbol creates a global label with name \"GND\" , ground" (id 5) (at 0 0 0)
+      (property "ki_description" "Special symbol for telling ERC where power comes from" (id 5) (at 0 0 0)
         (effects (font (size 1.27 1.27)) hide)
       )
-      (symbol "GND_0_1"
+      (symbol "PWR_FLAG_0_0"
+        (pin power_out line (at 0 0 90) (length 0)
+          (name "pwr" (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 1.27 -1.27)
-            (xy 0 -2.54)
-            (xy -1.27 -1.27)
-            (xy 0 -1.27)
+            (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)) (fill (type none))
         )
       )
-      (symbol "GND_1_1"
-        (pin power_in line (at 0 0 270) (length 0) hide
-          (name "GND" (effects (font (size 1.27 1.27))))
-          (number "1" (effects (font (size 1.27 1.27))))
-        )
-      )
     )
   )
 
-
   (junction (at 24.13 80.01) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 30.48 148.59) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 30.48 177.8) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 34.29 80.01) (diameter 0.9144) (color 0 0 0 0))
+  (junction (at 45.72 34.29) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 45.72 135.89) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 45.72 148.59) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 45.72 165.1) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 214.63 26.67) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 236.22 153.67) (diameter 0.9144) (color 0 0 0 0))
 
-  (no_connect (at 217.17 29.21))
-  (no_connect (at 257.81 69.85))
-  (no_connect (at 217.17 24.13))
-  (no_connect (at 257.81 77.47))
-  (no_connect (at 257.81 87.63))
+  (no_connect (at 257.81 44.45))
+  (no_connect (at 257.81 29.21))
+  (no_connect (at 257.81 80.01))
+  (no_connect (at 109.22 157.48))
+  (no_connect (at 257.81 85.09))
   (no_connect (at 246.38 146.05))
+  (no_connect (at 257.81 77.47))
+  (no_connect (at 257.81 69.85))
+  (no_connect (at 109.22 160.02))
   (no_connect (at 246.38 135.89))
-  (no_connect (at 257.81 46.99))
   (no_connect (at 217.17 87.63))
-  (no_connect (at 257.81 62.23))
-  (no_connect (at 257.81 44.45))
-  (no_connect (at 257.81 67.31))
-  (no_connect (at 109.22 160.02))
-  (no_connect (at 109.22 157.48))
+  (no_connect (at 257.81 87.63))
+  (no_connect (at 257.81 46.99))
   (no_connect (at 257.81 74.93))
+  (no_connect (at 217.17 29.21))
+  (no_connect (at 217.17 24.13))
+  (no_connect (at 257.81 67.31))
+  (no_connect (at 257.81 62.23))
   (no_connect (at 257.81 59.69))
-  (no_connect (at 257.81 85.09))
-  (no_connect (at 257.81 80.01))
 
   (wire (pts (xy 24.13 72.39) (xy 24.13 80.01))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   (wire (pts (xy 38.1 165.1) (xy 38.1 170.18))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
-  (wire (pts (xy 43.18 34.29) (xy 50.8 34.29))
+  (wire (pts (xy 43.18 34.29) (xy 45.72 34.29))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
-  (wire (pts (xy 43.18 36.83) (xy 49.53 36.83))
+  (wire (pts (xy 43.18 36.83) (xy 53.34 36.83))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
   (wire (pts (xy 43.18 39.37) (xy 110.49 39.37))
   (wire (pts (xy 43.18 52.07) (xy 45.72 52.07))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
+  (wire (pts (xy 45.72 31.75) (xy 45.72 34.29))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+  )
+  (wire (pts (xy 45.72 34.29) (xy 54.61 34.29))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+  )
   (wire (pts (xy 45.72 52.07) (xy 45.72 54.61))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
-  (wire (pts (xy 45.72 133.35) (xy 45.72 135.89))
+  (wire (pts (xy 45.72 128.27) (xy 45.72 135.89))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
   (wire (pts (xy 45.72 135.89) (xy 38.1 135.89))
   (wire (pts (xy 45.72 148.59) (xy 54.61 148.59))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
-  (wire (pts (xy 45.72 162.56) (xy 45.72 165.1))
+  (wire (pts (xy 45.72 157.48) (xy 45.72 165.1))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
   (wire (pts (xy 45.72 165.1) (xy 38.1 165.1))
   (wire (pts (xy 46.99 90.17) (xy 46.99 92.71))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
-  (wire (pts (xy 57.15 36.83) (xy 66.04 36.83))
-    (stroke (width 0) (type solid) (color 0 0 0 0))
-  )
   (wire (pts (xy 57.15 80.01) (xy 59.69 80.01))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
   (wire (pts (xy 59.69 90.17) (xy 59.69 92.71))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
+  (wire (pts (xy 60.96 36.83) (xy 69.85 36.83))
+    (stroke (width 0) (type solid) (color 0 0 0 0))
+  )
   (wire (pts (xy 86.36 144.78) (xy 88.9 144.78))
     (stroke (width 0) (type solid) (color 0 0 0 0))
   )
   (label "3V3_BT" (at 24.13 72.39 270)
     (effects (font (size 1.27 1.27)) (justify right bottom))
   )
+  (label "1V8_BT" (at 45.72 128.27 270)
+    (effects (font (size 1.27 1.27)) (justify right bottom))
+  )
+  (label "1V8_BT" (at 45.72 157.48 270)
+    (effects (font (size 1.27 1.27)) (justify right bottom))
+  )
   (label "MFB" (at 48.26 49.53 180)
     (effects (font (size 1.27 1.27)) (justify right bottom))
   )
-  (label "3V3_BT" (at 50.8 34.29 180)
+  (label "3V3_BT" (at 54.61 34.29 180)
     (effects (font (size 1.27 1.27)) (justify right bottom))
   )
   (label "SCL_1V8" (at 54.61 148.59 180)
   (label "1V8_BT" (at 59.69 72.39 270)
     (effects (font (size 1.27 1.27)) (justify right bottom))
   )
-  (label "SDO_3V3" (at 66.04 36.83 180)
+  (label "SDO_3V3" (at 69.85 36.83 180)
     (effects (font (size 1.27 1.27)) (justify right bottom))
   )
   (label "SDO_3V3" (at 99.06 142.24 0)
     (effects (font (size 1.27 1.27)) (justify right))
   )
 
+  (symbol (lib_id "power:PWR_FLAG") (at 45.72 31.75 0) (unit 1)
+    (in_bom yes) (on_board yes)
+    (uuid "ce826ad4-b2d1-4064-a7e6-a6ee855b8b46")
+    (property "Reference" "#FLG0106" (id 0) (at 45.72 29.845 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Value" "PWR_FLAG" (id 1) (at 45.72 26.67 0))
+    (property "Footprint" "" (id 2) (at 45.72 31.75 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+    (property "Datasheet" "~" (id 3) (at 45.72 31.75 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
+  )
+
   (symbol (lib_id "power:+3V3") (at 27.94 31.75 0) (unit 1)
     (in_bom yes) (on_board yes)
     (uuid "216cbb0c-1790-4682-b3a7-f4599e7df31c")
     )
   )
 
-  (symbol (lib_id "power:+1V8") (at 45.72 133.35 0) (unit 1)
-    (in_bom yes) (on_board yes)
-    (uuid "122fa003-3099-42f8-84a7-4aae62f21254")
-    (property "Reference" "#PWR0174" (id 0) (at 45.72 137.16 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (property "Value" "+1V8" (id 1) (at 46.99 128.27 0))
-    (property "Footprint" "" (id 2) (at 45.72 133.35 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (property "Datasheet" "" (id 3) (at 45.72 133.35 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-  )
-
-  (symbol (lib_id "power:+1V8") (at 45.72 162.56 0) (unit 1)
-    (in_bom yes) (on_board yes)
-    (uuid "ece94ac7-d272-40e0-93a4-90cac9ccaba0")
-    (property "Reference" "#PWR0177" (id 0) (at 45.72 166.37 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (property "Value" "+1V8" (id 1) (at 46.99 157.48 0))
-    (property "Footprint" "" (id 2) (at 45.72 162.56 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-    (property "Datasheet" "" (id 3) (at 45.72 162.56 0)
-      (effects (font (size 1.27 1.27)) hide)
-    )
-  )
-
   (symbol (lib_id "power:GND") (at 24.13 92.71 0) (unit 1)
     (in_bom yes) (on_board yes)
     (uuid "df560806-9593-486a-9780-748bceb527a8")
     )
   )
 
-  (symbol (lib_id "Device:R") (at 53.34 36.83 90) (unit 1)
+  (symbol (lib_id "Device:R") (at 57.15 36.83 90) (unit 1)
     (in_bom yes) (on_board yes)
     (uuid "15e12229-2e0e-4ce6-abff-5c302439b674")
-    (property "Reference" "R74" (id 0) (at 53.34 31.6038 90))
-    (property "Value" "150" (id 1) (at 53.34 33.903 90))
-    (property "Footprint" "Resistor_SMD:R_0603_1608Metric" (id 2) (at 53.34 38.608 90)
+    (property "Reference" "R74" (id 0) (at 57.15 31.6038 90))
+    (property "Value" "150" (id 1) (at 57.15 33.903 90))
+    (property "Footprint" "Resistor_SMD:R_0603_1608Metric" (id 2) (at 57.15 38.608 90)
       (effects (font (size 1.27 1.27)) hide)
     )
-    (property "Datasheet" "~" (id 3) (at 53.34 36.83 0)
+    (property "Datasheet" "~" (id 3) (at 57.15 36.83 0)
       (effects (font (size 1.27 1.27)) hide)
     )
   )

hackamp/hardware/front.kicad_sch

   (junction (at 261.62 130.81) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 266.7 77.47) (diameter 0.9144) (color 0 0 0 0))
 
-  (no_connect (at 48.26 113.03))
   (no_connect (at 48.26 115.57))
   (no_connect (at 234.95 128.27))
+  (no_connect (at 48.26 113.03))
   (no_connect (at 60.96 115.57))
 
   (wire (pts (xy 22.86 43.18) (xy 25.4 43.18))

hackamp/hardware/hackamp.kicad_pro

   },
   "sheets": [
     [
-      "c990caaa-c62c-4eb5-8bee-586dc7fd1de2",
+      "6c02bcd0-6524-432b-a051-1d021df2ab33",
       ""
     ],
     [

hackamp/hardware/hackamp.kicad_sch

     (path "/00000000-0000-0000-0000-00005fa5bd36/4385f026-a419-4b2f-9a90-a7611dd568eb"
       (reference "#PWR05") (unit 1) (value "GND") (footprint "")
     )
+    (path "/00000000-0000-0000-0000-00005fa5bd36/68cda14e-5fca-47bc-bafc-c85832d9d661"
+      (reference "#PWR0103") (unit 1) (value "GND") (footprint "")
+    )
     (path "/00000000-0000-0000-0000-00005fa5bd36/00000000-0000-0000-0000-00005fb78f6f"
       (reference "#PWR0119") (unit 1) (value "GND") (footprint "")
     )
     (path "/00000000-0000-0000-0000-00005fa5bd7a/00000000-0000-0000-0000-00005fa6b91a"
       (reference "#PWR0102") (unit 1) (value "+3.3V") (footprint "")
     )
-    (path "/00000000-0000-0000-0000-00005fa5bd7a/00000000-0000-0000-0000-00005fa871d5"
-      (reference "#PWR0103") (unit 1) (value "GND") (footprint "")
-    )
     (path "/00000000-0000-0000-0000-00005fa5bd7a/00000000-0000-0000-0000-00005fa8bff2"
       (reference "#PWR0104") (unit 1) (value "GND") (footprint "")
     )
-    (path "/00000000-0000-0000-0000-00005fa5bd7a/00000000-0000-0000-0000-00005fab6c57"
-      (reference "#PWR0105") (unit 1) (value "GND") (footprint "")
-    )
     (path "/00000000-0000-0000-0000-00005fa5bd7a/00000000-0000-0000-0000-00005fab6c6e"
       (reference "#PWR0106") (unit 1) (value "GND") (footprint "")
     )
     (path "/00000000-0000-0000-0000-00005fa5bd7a/9538ca32-2a66-4b9b-83bc-07e377df3f12"
       (reference "J12") (unit 1) (value "GPIO") (footprint "Connector_PinHeader_2.54mm:PinHeader_2x10_P2.54mm_Vertical")
     )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/1dbbef67-e1c7-42af-81c5-5484adf37e0f"
+      (reference "L7") (unit 1) (value "600") (footprint "Inductor_SMD:L_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/dd9da900-3b5f-43f2-84c8-4f993c3e3484"
+      (reference "L8") (unit 1) (value "600") (footprint "Inductor_SMD:L_0603_1608Metric")
+    )
     (path "/00000000-0000-0000-0000-00005fa5bd7a/00000000-0000-0000-0000-00005fa8a848"
       (reference "R1") (unit 1) (value "1.8k") (footprint "Resistor_SMD:R_0603_1608Metric")
     )
     (path "/00000000-0000-0000-0000-00005fa5bd7a/1a276aa6-b113-4617-8385-287d58f1fd14"
       (reference "Y1") (unit 1) (value "8MHz") (footprint "Crystal:Crystal_SMD_HC49-SD")
     )
+    (path "/00000000-0000-0000-0000-00005fa5bdb1/ce826ad4-b2d1-4064-a7e6-a6ee855b8b46"
+      (reference "#FLG0106") (unit 1) (value "PWR_FLAG") (footprint "")
+    )
     (path "/00000000-0000-0000-0000-00005fa5bdb1/807b9152-fd52-403a-9ed3-cb5ca415864e"
       (reference "#PWR03") (unit 1) (value "GND") (footprint "")
     )
     (path "/00000000-0000-0000-0000-00005fa5bdb1/d10dfa36-91b4-4cfa-8214-82668e624359"
       (reference "#PWR0161") (unit 1) (value "GND") (footprint "")
     )
-    (path "/00000000-0000-0000-0000-00005fa5bdb1/122fa003-3099-42f8-84a7-4aae62f21254"
-      (reference "#PWR0174") (unit 1) (value "+1V8") (footprint "")
-    )
     (path "/00000000-0000-0000-0000-00005fa5bdb1/7d5992a2-bc99-4512-99a4-95d97cc093d3"
       (reference "#PWR0175") (unit 1) (value "+3V3") (footprint "")
     )
     (path "/00000000-0000-0000-0000-00005fa5bdb1/b257cfa8-07a6-4da5-a956-83064ec30ba9"
       (reference "#PWR0176") (unit 1) (value "+3V3") (footprint "")
     )
-    (path "/00000000-0000-0000-0000-00005fa5bdb1/ece94ac7-d272-40e0-93a4-90cac9ccaba0"
-      (reference "#PWR0177") (unit 1) (value "+1V8") (footprint "")
-    )
     (path "/00000000-0000-0000-0000-00005fa5bdb1/f0e2c087-333f-4fe7-8bb0-7e06d74c83bc"
       (reference "#PWR0216") (unit 1) (value "GND") (footprint "")
     )

hackamp/hardware/headphone-amp.kicad_sch

     )
   )
 
-
   (junction (at 101.6 78.74) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 124.46 99.06) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 139.7 68.58) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 201.93 111.76) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 217.17 71.12) (diameter 0.9144) (color 0 0 0 0))
 
-  (no_connect (at 127 104.14))
-  (no_connect (at 162.56 96.52))
   (no_connect (at 162.56 86.36))
+  (no_connect (at 162.56 96.52))
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hackamp/hardware/processor.kicad_sch

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