Month: December 2008

Simple PIR motion sensing

One of our readers sent us a link to this very simple PIR circuit. It’s a really easy way to conserve battery life on any interactive project. Check out the link for a circuit diagram and more information. When we design lighting circuit, we would like to light up the LEDs only when there is […]

LEGO ball contraption

Andrew sent us a link to his LEGO ball contraption. It consists of conveyor belts, lifts, and sawtooth mechanisms. He plans on bringing this to one of the Great Ball Contraption events. Having recently gotten back into Lego, and wanting to build something cool that I could also bring to Lego events, I decided to […]