Month: September 2009

Dice reader, version 2

Dice reader, version 2

The last time we covered this neat die reading machine by Steve Hoefer, he had a very nice design that was starting to be able to determine the number of a die placed on it. Well, he swapped out his problematic photoresistor sensors for an infrared emitter/detector-based scheme to produce version 2, which he claims works with almost perfect accuracy.

CD drive scrounged junkbots

After exploring the innards of our CD drives, students in my robotics class are coming up with some clever junkbots. Here are a few of the first ones, more to come as they evolve.As the school year begins, how do you help students understand the basics of electricity, manufacturing, and creating original devices? As a student, what are the best projects for the start of the semester or school year to get you excited to go deeper and learn more?