This circuit output can also be used to charge AA or AAA rechargeable batteries. This circuit can provide currents up to 100mA, so we can use this power unit for most of the sensor modules without any trouble.
So with this we may provide voltages accurately for the other modules. With this we cannot get a regulator for every one of them. So here we will make a simple circuit which will provide a voltage output from 0-5 volts at a resolution of 0.05V. Some digital electronic modules like accelerometer work on voltage 3.3V and some work on 2.2V. For that we are going use ADC (Analog to Digital Conversion) and PWM (Pulse Width Modulation) feature.
In this tutorial we will develop a 5V variable voltage source from Arduino Uno.
