ESP32 DevKit V1 Extension board
Posted: Thu May 23, 2024 10:06 pm
Extension of ESP32 DevKit V1:
- External 12V power source
- MC34063-based +5V and -4.2V regulator(both ~300mA max)
- Place for LD1117-3.3, if necessary(DevKit V1 one used by default)
- I2C connector at 3.3V
- I2C EEPROM 24LCXX
- 1 x 2x4 decoder/demultiplexer generating CS0..CS3 for SPI devices
- 1 x 3.3V SPI connector with CS1..CS3
- 1 x 3.3V SPI LCD connector with CS0 and background LED power
- UART2 connector at TTL(5V) levels
- 2x 7A SPDT relay(12V coil)
- 2x 20A 30V N-MOS with 12V BJT gate driver
- 2x ADC OP-AMP input buffer
- 2x DAC OP-AMP output buffer