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Analog

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

More accurate analog inputs by measuring Vcc on Arduino

Measuring voltages up to 25V with Arduino and FZ0430

Up to 32 servos on Arduino with USC-32 controller

Control 16 servos or 16 PWM outputs on Arduino with PCA9685

More outputs/inputs in Arduino with CD74HC4067 multiplexer