BEAM Solar Chariots


BEAM robot building techniques allow you to build fun and simple little robots with lots of room for stylizing. BEAM robots can move anywhere from a fraction of an inch to a couple of feet, depending on how big their capacitors are. You can also use batteries. For these two... Read more »

Cheap Soldering Fan


This fume extractor is based on the mini fume extractor that was made by Marc de Vinck. This is basically a fume extractor mounted onto a third-hand tool. In other words, this is just a thing you can do with the mini fume extractor. If you want a fume extractor... Read more »

Simple, Cheap, Multi-Channel, Sound-Reactive EL Wire


Most EL wire displays are static, because they use an inverter that simply turns the EL wire on (i.e. constant-on). Sound-reactive inverters are available, but most of these are only “single channel”, so the wires are either all on or all off. To really make your display dynamic you need... Read more »

Tiny Wanderer


In early 2011 my robot club, the Dallas Personal Robotics Group, was looking for a way to help our beginning members build up their skills. To this end, we produced a series of lessons covering 5 topics needed to make a simple, programmable robot: making PCBs with the toner transfer... Read more »

Kitty Twitty Cat Toy


About 2 months ago, after years of begging and pleading from my family, I reluctantly agreed to get another cat from the local shelter. We already have a menagerie of beasts that share our home, but for some reason they felt we needed another. I admit, I do like our... Read more »

Coffee Table MAME Console


By John Baichtal and Adam Wolf Do you remember those classic video game arcades filled with rattling quarters, 8-bit songs, and flashing lights? You can reclaim that excitement in your own living room with this Coffee Table MAME Console. In 1997, Italian software developer Nicola Salmoria released the first iteration... Read more »

Speed Vest


This lightweight night-cycling vest displays your current speed in glowing, 7-inch-tall numbers easily visible to cars. Read more »