Arduino Power Supply 0 - 5V


This project lets you manipulate the voltage from an Arduino microcontroller so you can utilize a power supply from 0 to 5 Volts. For more information about this project, go to the following website:
For getting the code, go to:


robrlstn (Jul 20, 2016)
Adjustable 0 to 5 volts BUT what is the maximum current available? It would seem to bed what an ATmega328 pin can deliver, like 20 mA?

Please specify the maximum available current. Thanks
robrlstn (Jul 20, 2016)
OK, I looked at the schematic. If I'm reading it correctly, one adjusts the voltage with a pot, R2. And the Arduino reads that voltage through A0 and displays it on the LCD.

From the description ( ... "let's you manipulate the voltage from an Arduino ...") I though that I could program the Arduino to, say, output different voltages, like a ramp, or whatever, for testing an external circuit. But the voltage adjustment is manual.

So I think a better description would be something like "This project lets you measure a voltage from 0 to 5 volts, displaying it on an LCD".