This SMD op-amp project uses the TI RC-4560 dual op-amp chip and a salt water-etched PCB. The builder got the op-amp as a free sample from Texas Instruments and scavenged all of the SMD resistors from old hard drive electronics. The results are not pretty, but they’re functional. The circuit used (with some changes) is […]
This project (posted over a year ago), is old news by interweb standards, but I’d never seen it. And the results are gorgeous. I so want to make one and hang it from the clearstory in my office (though I think my ceiling fan might have something to say about that). Dixie Cup Spherical Dodecahedron […]
This builder used his iRobot Create platform to quest for the holy grail of domestic bots: the drink-serving robo-butler. ServerBot – for serving food and drinks – Link
Here an Instructable on using the iRobot Create, parts of an old injet printer, and some C/C++ programming to create a marker-wielding posterbot. PosterBot: Make a Marker-Writing Robot out of an Old Inket printer and an iRobot Create – Link Related: The Make:: Drawbot Draws! – Link Make Podcast: Weekend Projects – Making A Drawbot […]
A Double Pendulum, a.k.a. a Chaotic Pendulum, is a simple, jointed pendulum used to study dynamic systems/chaos theory. It’s also just a really cool widget that’s fun to watch. Not to be confused, BTW, with Steve Jackson’s (of Steve Jackson Games fame) Chaos Machine, which is an entirely different mechanical animal. The Chaos Machine (Double […]
Here’s a quick how-to on making beautiful colored globes of ice (which involves little more than freezing colored water in a balloon), but it’s something I’d never thought of and would make an interesting party decoration. Ice Gems – Link
This was one of the other winners of the Instructables/TreeHugger/PopSci Go Green! Contest. It’s a fairly easy to build tank-top sink that uses the inflow tank water as a (cold water) hand washing sink. Hack a Toilet for free water – Link Related: Go Green! contest winners – Link
