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.
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!
I suppose with the ice storms and subsequent power failures this past week, some of you may have gotten a head start.
Challenge: CPF "Junkyard wars", Episode 1
Reply With Quote