Challenge: CPF "Junkyard wars", Episode 1
Let's say you are allowed one emitter of your choice, one driver/resistor, the proper complement of batteries, and all the stranded insulated copper wire you desire.
You have no other flashlight parts (springs, contacts, o-rings, lenses, reflectors, threaded bodies, etc.) and no parts from other electronic devices, that are similar to a flashlight, or made for electronics devices. You do not have access to a mill or lathe.
Now go make a reliable flashlight from spare objects from around your house.
I suppose with the ice storms and subsequent power failures this past week, some of you may have gotten a head start.
- The batteries must be replaceable by hand only (no soldering iron to disconnect the batteries, or tools to open the flashlight).
- The flashlight must be able to be turned on/off without disassembly.
- It must run for at least a half hour, and not pose a hand scalding/fire hazard.
- It should be water resistant.
- Post pictures and a description of how it was built and how it is to be used. Movies welcome!
Last edited by EngrPaul; 01-15-2007 at 07:45 PM.