The Solarbotics GraviTrack Marble Machin...

Ok, we were fed up with the strange pinouts on the L298 motor driver, and decided to do something about it. The result is the Solarbotics L298 Compact Motor Driver. It happens to be the same size as a BEP tile, offers four status LEDs, plugs for easy wiring, and screw terminals for motor and […]

We've had some requests about our own demo Nano robot sumo "BittyBad", which uses a pair of GM15 gear motors. On the GM15 detail page, you'll see a picture of it! It features 2 GM15 gear motors, two 90mA/h LiPoly 3.7V batteries (in series), two "ProxDots" objects sensors, a pair of edge-sensors and a (gasp!) […]

Today August 21, 2017, we were treated to about 80% solar eclipse. In spite of the smoke, the weather cooperated so we couldn't miss this event. Pinhole projector boxes were made out of cereal and shipping boxes: Fancy ones were mounted onto a tripod, and a phone camera recording a time lapse video was taped […]

#4-40x1/2in Yellow Zinc Standoff, M/M, 1/4in threaded ends $0.50 #4-40 x 1/2" yellow zinc coated (chromate) steel standoff. IR Reflector sensor with leads $1.00 Reflective optical sensor with transistor output. 44mm Piezo Speaker $2.25 For making a LOUD beep, this piezo suits your need. Comes mounted in a plastic case with mounting tabs. Maxell LR44 […]