Overview

The goal of this project was to build a functional, Ardunio-controlled power supply. We designed the supply and controller so that users can connect an old laptop wall wart (output voltage between 14 and 20V) to the supply’s Vin line and digitally specify the desired output voltage in the range between 0 and 12 V. Assuming the builder already has an Ardunio and a laptop charger with the right specs, parts for a single source should cost around $15. This project was published to Instructables where it won several prizes and has had over 70k views.

See all the details here or in the Instructables Project linked below.