main
Rithesh03 Update 3: PCB design completed - routed board, manufacturing package (prototype, do not order yet), WLED guide, final checklist, Hydrogen feedback 1ed072d 13d ago
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(kicad_sch
  (version 20230121)
  (generator eeschema)
  (uuid "9c194a74-f3c4-5455-bdeb-fc310d29da58")
  (paper "A3")
  (title_block
    (title "ESP32-C3 Wi-Fi controller and buttons")
    (date "2026-09-23")
    (rev "0.1 (prototype)")
    (company "RITHESH LED Display")
    (comment 1 "ESP32-C3-MINI-1-N4 running WLED")
    (comment 2 "U4 footprint: official Espressif land pattern"))
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    (pin "1"
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    (instances
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        (path "/4ab31b2f-bda9-564b-ad22-65e9eb54c1ea/1149ce99-463a-5ca5-b431-ad13f4d6a8ea"
          (reference "#PWR053")
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  (symbol
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    (at 85.09 214.63 0)
    (unit 1)
    (in_bom yes)
    (on_board yes)
    (dnp yes)
    (uuid "43289b36-1fb3-519b-9884-f1ac399218ae")
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    (property "Footprint" "Capacitor_SMD:C_0402_1005Metric"
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    (pin "1"
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    (pin "2"
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    (instances
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  (label "USB_DN_MCU"
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    (uuid "967203da-39fb-545e-8f0b-37e9dc6de6d8"))
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    (uuid "06bbf81e-fe9a-5666-a0f3-5c574e587a70"))
  (symbol
    (lib_id "power:GND")
    (at 105.41 220.98 0)
    (unit 1)
    (in_bom no)
    (on_board yes)
    (dnp no)
    (uuid "141cadcf-4c87-5126-bc8e-f57336476e41")
    (property "Reference" "#PWR054"
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    (property "Value" "GND"
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    (pin "1"
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    (in_bom yes)
    (on_board yes)
    (dnp yes)
    (uuid "8c88c6dc-2451-523f-9f73-63ff2d4ab4e6")
    (property "Reference" "C14"
      (at 107.95 213.36 0)
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        (justify left)))
    (property "Value" "DNP"
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    (property "Footprint" "Capacitor_SMD:C_0402_1005Metric"
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    (pin "1"
      (uuid "91c74e82-ec18-5010-9249-0214b603447e"))
    (pin "2"
      (uuid "dcd83b4a-bbdc-51ed-baa9-02f609bfd7fe"))
    (instances
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          (reference "C14")
          (unit 1)))))
  (text "R14/R15 22R: Espressif recommends reserving series\nresistors (start at 22-33R) on USB D+/D-, near the chip.\nC13/C14: spare capacitor spots to GND,\nNOT FITTED (Espressif: initially unpopulated).\nChange only if USB proves unreliable."
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    (uuid "d74acd77-ea72-562a-b8c2-5ddbd1759565"))
  (rectangle
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    (stroke
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      (type dash))
    (fill
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    (uuid "476d8f29-a73f-595d-a800-f641115b91df"))
  (text "6. Serial debug pads (UART0)"
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  (label "U0TXD"
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    (uuid "76006768-26c3-5bb1-b832-daab79f635db"))
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    (stroke
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    (uuid "d5c63f69-58af-5938-a736-64289115d70c"))
  (label "U0TXD_TP"
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    (uuid "8a421520-d30c-50dd-92e7-a05f6b2cefad"))
  (symbol
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    (uuid "66a0cec5-9c29-5c81-a388-a90eea83bd45")
    (property "Reference" "R16"
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    (property "Value" "499R"
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    (property "Footprint" "Resistor_SMD:R_0402_1005Metric"
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        (path "/4ab31b2f-bda9-564b-ad22-65e9eb54c1ea/1149ce99-463a-5ca5-b431-ad13f4d6a8ea"
          (reference "R16")
          (unit 1)))))
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    (uuid "4496a2de-649e-55f8-bb2b-e5950cf12c99"))
  (symbol
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    (at 260.35 214.63 0)
    (unit 1)
    (in_bom no)
    (on_board yes)
    (dnp no)
    (uuid "9e654773-c35c-51c4-8e11-9da3b8e8e783")
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        (justify left)))
    (property "Value" "IO20_RX"
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    (property "Footprint" "TestPoint:TestPoint_Pad_D1.5mm"
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    (pin "1"
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          (reference "TP9")
          (unit 1)))))
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  (label "U0TXD_TP"
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    (uuid "4b9eadad-0de8-523d-a682-8d89a4fa82e1"))
  (symbol
    (lib_id "Connector:TestPoint")
    (at 279.4 214.63 0)
    (unit 1)
    (in_bom no)
    (on_board yes)
    (dnp no)
    (uuid "75d856eb-8f1a-5a40-9d16-3e9f87240213")
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        (justify left)))
    (property "Value" "IO21_TX"
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      (project "rithesh-led-display"
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          (reference "TP10")
          (unit 1)))))
  (text "Connect a 3.3 V USB-serial adapter here if USB\nprogramming or WLED ever fails: adapter TX -> TP9,\nadapter RX -> TP10, adapter GND -> a GND pad.\nR16 499R on TX: Espressif recommendation\n(suppresses harmonics). Never connect 5 V here."
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      (justify left top))
    (uuid "b99c7bc9-6ba9-5c12-abcd-9486143681d1"))
  (text "SW2 BOOT (GPIO9): hold while pressing RESET to load\nnew software (rescue button). Label: BOOT\nSW3 ON/OFF (GPIO5): WLED button 0, short press =\ndisplay on/off. Label: ON/OFF\nR8/R11: keep the buttons reading 'not pressed'.\nR9/R10: hold boot pins GPIO8/GPIO2 high so the\nchip always starts normally."
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    (uuid "3640725a-ee95-532c-bf44-16cf8b96224e")))