hardware: MCU power/reset/crystal schematics.

hackamp/hardware/bluetooth.kicad_sch

   (junction (at 39.37 68.58) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 139.7 55.88) (diameter 0.9144) (color 0 0 0 0))
 
-  (no_connect (at 182.88 114.3))
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-  (no_connect (at 182.88 99.06))
-  (no_connect (at 182.88 96.52))
-  (no_connect (at 49.53 60.96))
+  (no_connect (at 182.88 109.22))
+  (no_connect (at 182.88 88.9))
+  (no_connect (at 182.88 104.14))
+  (no_connect (at 182.88 91.44))
   (no_connect (at 142.24 58.42))
   (no_connect (at 182.88 76.2))
+  (no_connect (at 182.88 114.3))
   (no_connect (at 142.24 116.84))
-  (no_connect (at 182.88 88.9))
-  (no_connect (at 182.88 104.14))
-  (no_connect (at 182.88 116.84))
-  (no_connect (at 182.88 106.68))
-  (no_connect (at 182.88 109.22))
+  (no_connect (at 182.88 99.06))
   (no_connect (at 142.24 53.34))
-  (no_connect (at 182.88 91.44))
+  (no_connect (at 182.88 96.52))
+  (no_connect (at 49.53 50.8))
+  (no_connect (at 182.88 106.68))
+  (no_connect (at 182.88 116.84))
+  (no_connect (at 49.53 60.96))
 
   (wire (pts (xy 39.37 66.04) (xy 39.37 68.58))
     (stroke (width 0) (type solid) (color 0 0 0 0))

hackamp/hardware/hackamp.kicad_pro

   },
   "sheets": [
     [
-      "ffc4f944-4bb2-4a17-a297-ebb4edeae428",
+      "79e8fb61-40db-4b64-9910-a8c6d2863552",
       ""
     ],
     [

hackamp/hardware/hackamp.kicad_sch

     (path "/00000000-0000-0000-0000-00005fa5bd7a/00000000-0000-0000-0000-00005fab6c6e"
       (reference "#PWR0106") (unit 1) (value "GND") (footprint "")
     )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/6dbf7568-9fc2-417d-9685-99aec62a96d5"
+      (reference "#PWR0163") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/87d4c309-6eae-49f6-9a50-44e7f0fca2ee"
+      (reference "#PWR0164") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/b8b2ead8-fcb3-4e53-ba0c-4b7de3d8228a"
+      (reference "#PWR0165") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/98dddbb8-3d7c-451c-91c0-87740954332c"
+      (reference "#PWR0166") (unit 1) (value "+3.3V") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/cbb1f3d4-e10c-4113-ad9b-25a6236b471b"
+      (reference "#PWR0167") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/ef224e69-1f16-4398-a829-a6ecd304743c"
+      (reference "#PWR0168") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/c268c1aa-3a2b-4c6c-9f53-503c2dbfc75a"
+      (reference "#PWR0169") (unit 1) (value "+3.3V") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/e87d74d6-b8af-444e-bd8c-cf8a71a5d166"
+      (reference "#PWR0170") (unit 1) (value "+3.3V") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/0e1f9a55-c02f-4532-bd0c-f94903b9f9a7"
+      (reference "#PWR0171") (unit 1) (value "+3.3V") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/b7c5e92d-99c1-4598-a41a-056d330385ad"
+      (reference "#PWR0172") (unit 1) (value "GND") (footprint "")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/d8c9ec50-62dd-4f5b-8e80-75cde5d7723b"
+      (reference "C43") (unit 1) (value "10uF") (footprint "Capacitor_SMD:C_0805_2012Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/7a2f3eae-693e-4fa6-92f8-453140bd18ce"
+      (reference "C44") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/287d0d04-0441-42c0-87be-2794638f6c93"
+      (reference "C45") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/c7d5416a-fc41-4a42-928b-897ea70ebf73"
+      (reference "C46") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/4f2b16ac-1451-49ae-86db-f662a9c2b40c"
+      (reference "C47") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/f03e8022-3689-4a3a-93d9-0dbb01bb9e9a"
+      (reference "C48") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/b5a82236-79aa-41e0-8523-8db902ce227c"
+      (reference "C49") (unit 1) (value "26pF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/e1854ce8-c9bc-42fe-9788-3a337718a807"
+      (reference "C50") (unit 1) (value "26pF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/7cfe81c8-640f-4d54-af39-a4d4984a0843"
+      (reference "C51") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/42348c50-1466-4c28-9e71-42f5f78faa3d"
+      (reference "C52") (unit 1) (value "2.2uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/8f246f83-1a49-491f-88a0-65d8ad3ee35e"
+      (reference "C53") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/19d951ae-c3cc-48aa-ac58-89d3840e813b"
+      (reference "C54") (unit 1) (value "2.2uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/582cf4f3-055e-4d9f-9642-c213b7f26606"
+      (reference "C55") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/159205bf-cc7c-4564-8a0a-0390ac035763"
+      (reference "C56") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/344c8541-90f5-4108-a9ed-751309fa75c2"
+      (reference "C57") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/6b1703b7-21c5-4019-a1ca-d7c09a773957"
+      (reference "C58") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/038c4d67-47be-47dd-b530-fa5f133222cd"
+      (reference "C59") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/9cb32cc3-38b2-4430-8167-7b2fb24118a5"
+      (reference "C60") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/68e2acef-154d-4fa1-81bf-f83286847b16"
+      (reference "C61") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/5f353dc3-ad6c-47ab-aca1-ff69d960e8b3"
+      (reference "C62") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/6297e11c-5be8-4898-b1fd-3822359058f0"
+      (reference "C63") (unit 1) (value "0.1uF") (footprint "Capacitor_SMD:C_0603_1608Metric")
+    )
     (path "/00000000-0000-0000-0000-00005fa5bd7a/00000000-0000-0000-0000-00005fa7af87"
       (reference "J1") (unit 1) (value "USB_B_Micro") (footprint "Connector_USB:USB_Micro-B_Amphenol_10104110_Horizontal")
     )
     (path "/00000000-0000-0000-0000-00005fa5bd7a/d5120ade-91c3-429d-8380-5b588307ce45"
       (reference "R30") (unit 1) (value "1k") (footprint "Resistor_SMD:R_0603_1608Metric")
     )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/bcf07545-94fe-45c1-a2a2-2eabafc834e7"
+      (reference "R31") (unit 1) (value "10k") (footprint "Resistor_SMD:R_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/d644f8a3-7af3-4da9-9787-82e7c7254ed7"
+      (reference "R32") (unit 1) (value "DNP") (footprint "Resistor_SMD:R_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/e151169b-2be0-4711-86e9-24c791781c9e"
+      (reference "R33") (unit 1) (value "1k") (footprint "Resistor_SMD:R_0603_1608Metric")
+    )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/73b8f029-d521-4839-9b51-017851c24030"
+      (reference "SW3") (unit 1) (value "Reset") (footprint "Button_Switch_THT:SW_PUSH_6mm_H4.3mm")
+    )
     (path "/00000000-0000-0000-0000-00005fa5bd7a/00000000-0000-0000-0000-00005fa5e618"
       (reference "U3") (unit 1) (value "STM32F429ZITx") (footprint "Package_QFP:LQFP-144_20x20mm_P0.5mm")
     )
+    (path "/00000000-0000-0000-0000-00005fa5bd7a/1a276aa6-b113-4617-8385-287d58f1fd14"
+      (reference "Y1") (unit 1) (value "8MHz") (footprint "Crystal:Crystal_SMD_HC49-SD")
+    )
     (path "/00000000-0000-0000-0000-00005fa5bdb1/00000000-0000-0000-0000-00005fb8557b"
       (reference "#PWR0107") (unit 1) (value "GND") (footprint "")
     )

hackamp/hardware/headphone-amp.kicad_sch

   (junction (at 191.77 36.83) (diameter 0.9144) (color 0 0 0 0))
   (junction (at 201.93 111.76) (diameter 0.9144) (color 0 0 0 0))
 
-  (no_connect (at 162.56 88.9))
-  (no_connect (at 201.93 73.66))
-  (no_connect (at 162.56 93.98))
-  (no_connect (at 162.56 96.52))
-  (no_connect (at 162.56 86.36))
   (no_connect (at 217.17 116.84))
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   (no_connect (at 217.17 114.3))
+  (no_connect (at 162.56 93.98))
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   (no_connect (at 127 109.22))
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   (no_connect (at 127 104.14))
 
   (wire (pts (xy 99.06 76.2) (xy 127 76.2))