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ESP32 WROOM-32 38-pin dev board
Microcontroller

ESP32 Dev Board

38-pin development board

Official Espressif documentation:

ESP32-DevKitC V4 user guide →

The ESP32 is a dual-core 240MHz microcontroller with built-in WiFi and Bluetooth. The 38-pin dev board breaks all GPIO pins out on two rows of headers.

It includes two 8-bit DAC outputs on GPIO25 and GPIO26 that produce a true analogue voltage - used in the PAM8403 guide to drive audio into the amplifier.

Key details

  • GPIO25 - DAC1, audio output (PAM8403 guide)
  • GPIO26 - DAC2 (unused in PAM8403 guide)
  • VIN - 5V input, powers the PAM8403
  • GND - common ground for all components