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Circuit Diagram


ComponentPin on DeviceGPIOHeaderRemarks
Servo Motor 1PWM12H5
Servo Motor 2PWM13H6
Servo Motor 3PWM4H7
Servo Motor 4PWM3H8
DFPlayer Mini MP3 PlayerRX18H11

IO18 is TX of ESP32C3

Connect pins 1 and 3 of H11

DFPlayer Mini MP3 PlayerTX19H11

IO19 is RX of ESP32C3

Connect pins 2 and 4 of H11

DFPlayer Mini MP3 PlayerBUSY8


MPR121IRQ7H1


MPR121SCL10H1


MPR121SDA6H1


WS2812DIN5H4



PCB layout


Soldered Controller Board with Components

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The following shows wires to be soldered in H11. The two switches soldered are for controlling volume of the MP3 player, and are optional.

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