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#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 […]

Update: Additional information from the Loveland Reporter Herald We've been big fans of Aleph Objects' 3D printers. They fit that sorta "Prosumer" niche. A bit better than kit-builds, not quite as expensive as the big professional units. We were disappointed we got the call a few months ago relating that Aleph was looking to shut […]

We've been working on testing our Sunceram Solarcells for real-world performance. Our first test is under direct sunlight, and we tried our best to get accurate data under ideal conditions - summer solstice, during the brightest hours of the day. As we're located in Calgary (lat:51.050N), Canada, you may get slightly different results due to […]

It's really nice to receive pics of projects people have built out of our book "Junkbots". Here's one of the latest: the Pendulum by Christopher Pepe. Nice magnetic suspension mechanism! Read More...