Variable Power Supply By Arduino Uno

In this tutorial we will develop a 5V variable voltage source from Arduino Uno. For that we are going use ADC (Analog to Digital Conversion) and PWM (Pulse Width Modulation) feature. Some digital electronic modules like accelerometer work on voltage 3.3V and some work on 2.2V. Some even work on lower voltages. With this we cannot get a regulator for every one of them. So here we will make a simple circuit w ...

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