A decent signal generator is handy for tuning electronic projects. [SC] sent in this AVR signal generator. The parts count is really, really low. An ATMega8 is the core, and a shift register runs the LCD. Everything else is is built from simple components. The PCB is double sided, so it’s probably the biggest stumbling block. (But you can probably get away with making jumpers instead of etching both sides.)
[We’ll be heading out to Toorcon later this week, so send if tips early if you got em.]
I finally managed to pick up the 7×10 mini-lathe (on sale!) I mentioned in the diy dive light post. Seriously, there are more mods for this thing than a DS. There’s a great introduction to this handy tool over at mini-lathe.com. I’ve been looking over the mods for a while to build up my buying furvor. Bill exploited the cycle of florescent lighting to make a simple tachometer. Dave streched his (Now there’s a kit for this from the little machine shop.) I’m thinking that I’ll whip up a pic/LED tachometer for my first mod.
Jared at inventgeek did aninterview and HAD got some screen time. You can catch it here. We get mentioned near the end. Jared, your office is way too clean.
Today I’m jonsing for my mig welder that was lost during a move. Remember the microwave oven foundry? If you’ve got a few old ovens around, you can gut em and build an arc welder. The transformers generate the voltage, and an SCR circuit makes the arc adjustable. Of course if arc isn’t your style, you can build your own TIG welder. Since you can score an arc for $150-300, but a TIG costs more – I’d go TIG.
You guys love those erricson phones. Mark sent in this SMS VCR remote control. I guess it’s an alternative to a TiVo, or handy for those one man sting operations. I started poking around the site and discovered a few more interesting projects. The toilet telemetry was a bit odd. I want the duck taped kitchen timer for my espresso bar.
Eric sent in his aux-in jack for his factory oldsmobile radio. We seen similar stuff before, but the implimentation is clean and simple.
I can’t read Czech, but [Dzinn] sent in some interesting looking lens mods for a Gsmart LCD3 digital camera. The mod is clean and allows SLR type lenses to be used in place of the original (fixed?) lens.
[Dheera] sent in the latest in uses for blue LEDs – a classic building window 6×6 matrix display.
I dug up some more cool tube projects. The Altoobs – a altoid tin based ham transmitter. Too bad the power supply is freakin huge.
I was looking for one of these the other day. This hybrid (solid state + tube) headphone amp is portable, running off of 12V. The site is loaded with headphone amp designs.
I built a chu moy headphone amp a while back, but tube amps are getting my interest. Chu Moy released a nice writeup of a tube based headphone amp. Ironically, tubes are easy, getting the right transformer is the issue these days.
