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I/O

How to use touch pins on an ESP32

How to use the DAC analog output in an ESP32

How to use PWM analog outputs on an ESP32

How to use the ADC analog inputs in an ESP32

How to control up to 16 GPIO by I2C with PCF8575 extender and Arduino

How to use an I2C bus extender TCA9548A and Arduino

Interrupts on all Arduino pins with PCINT

Adapting 3.3V to 5V (and vice versa) in Arduino with Level Shifter

Isolated inputs and outputs with Arduino and optocoupler

Switching Loads with Arduino and Solid State Relay