Final power supply board

How to build a dual voltage power supply for your breadboard

01-14-2018 Alex 0

One of the most popular articles on this website is the tutorial on how to build a 5V power supply on a breadboard. Following up on that, today we’re going to build a power supply that can output both 3.3V and 5V at the same time. This is particularly useful for circuits where both voltages are needed. We will solder the components on a small protoboard, which will conveniently plug directly into the power rails of our breadboard.

raspberry pi keyboard

Simulate keyboard and mouse events with xdotool on a Raspberry Pi

10-14-2017 Alex 0

In some situations, it can be useful to simulate user events on a keyboard or mouse, without an actual keyboard or mouse. The original idea that made me look into this subject, was that I wanted to run RetroPie on my Raspberry Pi with different ways to control the system. Instead of a keyboard, I wanted to use GPIO inputs (buttons or joysticks), or even a web interface that I could access from my phone. We’ll use a program called xdotool to do this.