Markus writes – “This miniature, 8-line home telephone exchange (PABX) works with standard telephones and features high-quality, user-friendly progress tones. Connection to telephones is via a two-wire unbalanced loop with a common ground. Only pulse dialling is supported although the exchange could be adapted to use a DTMF tone decoder.” Lots of schematics and photos […]
Jpmartineau writes in about the PVC light tent we posted earlier – “I loved the idea so I built my own. Using 1/2″ copper tubing instead of PVC.” – Link and translation.
From Engineering News of February, 1895 “The wheels have rubber bands 3 ins. wide and 3-16 in. thick on the tread, which make the machine run easily without jar, and also without noise, so that the rider can catch the sound of approaching trains.” – [via] Link. I really want to build one of these […]
Dj_flx has an Instructable on making a belt from old bicycle parts – Link.
Jacob has the same Intel Play cheap-o microscope I use (here) his photo blog takes a look at objects at the 3 different magnifications, like this old tie… Sample: An ugly orangey-brown tie. Source: Goodwill, where ties go to die. Man. This tie is even ugly up close. More here – Link. Use a Mac […]
Master over at LoFi turned this old Gameboy case into a 6 oscillator synth, check out the pictures, info and video – Link.
RickB writes –“I wanted to do something with plastic CD’s besides adding them to the land fill – My solution was to use them build 3-D geometric constructions. I describe here how I used 12 CD’s to build a Dodecahedron. I also built a 32 CD trucated Icosahedron, 12 of the CD’s must be cut […]
