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.

Allright, the keyboard light thing was a bit weak. Check out this el cheapo cd light spectrometer. The refractive properties of a CD are exploited to break up visible light into it’s components. Definitely an unexpected use of a CD. Of course, if you’re going for substance detection, you can use your CDROM as a spectrometer to identify uh, suspicous substances.

Another memory hack today. The TI calcs have gotten quite a following. (I’ll admit to writing blackjack for the 85 back in the day.) Michael, Brandon and Dan wrote a complete driver to let them use usb flash drives with the TI-84+.