Water Bottle Rocket Launcher: (click on images for larger pictures)
Click here for More Free Rocket Assembly Pictures and Instructions.
Other neat stuff: (click on images for larger pictures)
ImpedanceNomograph.pdf (1Hz to 10MHz)
ImpedanceNomographHiFreq.pdf (1kHz to 10GHz)
Timex DataLink Watch Adaptor for LCD Monitor (8k)
If you have a Chrysler radio with push-buttons that don't work right (one
button acts like you've pushed a different button), check out my repair method:
Here's a troubleshooting tool for finding shorts that blow fuses in a car. Connect a tail light lamp across a blown (open) fuse. Use this "fuse" in place of the fuse that blows. The lamp will light when excessive current flows. I recently found that a penny had fallen into the cigarette lighter hole in the console of a Chrysler LeBaron. When the car went over bumps, the penny would shift and, occasionally, blow the fuse, causing the radio to lose power (same circuit). By watching the light while wiggling and shaking everything I could wiggle, the penny was located and the problem solved. Here are pictures showing the fuse end(64k jpg), the lamp end(48k jpg), and the whole device(76k jpg). The glass lamp is covered with clear heat-shrink tubing for increased ruggedness. Adhesive (Goop) was smeared on the wire terminations for added strain relief. Note: This works well when the normal draw of the fused line is small, compared to the normal current rating of the lamp.