Flickr user [firegroove] recently had to take apart his Roland TR-909 drum machine in order to fix it, and he photographed the entire teardown, offering detailed pictures of the TR-909′s internal parts. The TR-909 is legendary as one of the first fully programmable drum machines that could store entire songs, and its legend is only boosted by its scarcity: only 10,000 were ever made. If you can’t afford or simply refuse to tear yours apart, look after the break for a few more photos from inside.
For those who have ever wondered what Chicken-Dancing Elmo’s mechanical parts look like without the fur and the chicken costume (and who among us hasn’t?), [Matt Kirkland] posted the photos above, along with several other animatronic, walking, talking and other mechanical stuffed toys stripped of all their fur and stuffing. These before and after shots were ostensibly taken for unspecified “research purposes,” but if you ask us, any research that takes a knife to Elmo is the most valid kind.
[Kevin Gorga] submitted this PIC controller based wire tracer to a project contest last year over at circuit cellar.A 125Khz signal is injected to the target cable and a pickup coil is used to detect the field and identify the wires location. You can grab the full project schematics and code here. The rest of the entries are pretty sweet, so be sure to check them out.