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)
Here is a note from another Timex Hacker:
It will work if modified with XP and 32 bit Win 7. change base resistor to 560R range, change transistor to 2n 2222a. collector resistor to 220R. series connect two ordinary diffused red leds ( superbright saturates watches optical input). Use 9 volt battery. Add 75-100R from 6-1 and 8-3 pin respectively. (red and blue outputs on VGA) this fools vga board into believing non plug and play monitor is connected. Now all you do is switch computer display to monitor + external. Software will offer choices for Dos or windows output calibration. Windows 4 seems to work best. Place watch 1-3 inches from leds. Calibrate to beep. All done. No switch required once vga plug pulled out will turn off. If worried 5 k from base to ground will assure. Built it all in old remote control box with amputated vga cable from old crt monitor. Hotglue manhatten technique. Tested on 98 xp and 7 works perfectly.
Thanks to John for this additional information.
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.