Technology

Seven-Segment Matrix

Seven-Segment Matrix

June’s Component of the Month is the diode, and a 7-segment display actually consists of seven light-emitting diodes! So, why not matrix them up? Skot Croshere built a matrix out of 512 7-segment displays: he calls it the DigitGrid: The DigitGrid is an array of seven-segment displays. There are 4096 LEDs, forming 512 7-segment digits […]

Omni Wheel Mobile Platform

Omni Wheel Mobile Platform

German neurobiologist Malte Ahlers (who built a Kinect-equipped humanoid robot), sent us a progress report on his omni wheel robot. What’s especially cool about this project is that Malte really delves into how such a robot works: I didn’t want to just copy some code that I found somewhere on the internet but wanted to […]

RPi Geiger Counter

RPi Geiger Counter

Chrono wrote in to share PiGI, a Geiger-Müller breakout board compatible with the RPi. The Raspberry Pi is a perfect platform to be a cheap but very versatile geiger counter. It can be connected to a TV/Monitor to display a nice graphical interface, it can play the nostalgic tak, tak, taktaktak sound via audio output […]