billw
Enlightened
Heh. you know those "magnetic body lights" (ie at www.premierglow.com)?
It turns out that they're pretty easy to attach to random flat-top cells, and an li-ion cell at 4+ V drives even the multi-led pattern flashers including blue LEDs pretty well.
Normally, these are driven by two small li coin cells (6V) or 3 small alkaline cells (4.5V.) They typically have two strong magnets, one in the body of the flasher, and one that you separate and put on the other side of your earlobe, hat brim, or whatever.
To attach to a larger battery, you need 1 piece of insulated wire, and a wad of tissue paper or something similar. thread the wire (end stripped) through the hole in the body where there used to be, and position the stripped end over the central battery contact (-) secure this with the wad of tissue and replace the bottom of the light (having removed the original batteries.) This should hold the
wire pretty securely on the contact area (if you want a permanant mod, you may be able to solder this.
Now, the magnet in the body should hold the light relatively securely on the positive side of a battery (assuming it has a steel case, of course.) The remaining magnet will hold the other end of wire relatively securely on the negative side of the battery. Done.
LED jewelery with only low voltage LEDS (red, yellow, oldstyle green) do nicely on a 123A primary li battery, too (3V)
Pictures soon, maybe.
billW
It turns out that they're pretty easy to attach to random flat-top cells, and an li-ion cell at 4+ V drives even the multi-led pattern flashers including blue LEDs pretty well.
Normally, these are driven by two small li coin cells (6V) or 3 small alkaline cells (4.5V.) They typically have two strong magnets, one in the body of the flasher, and one that you separate and put on the other side of your earlobe, hat brim, or whatever.
To attach to a larger battery, you need 1 piece of insulated wire, and a wad of tissue paper or something similar. thread the wire (end stripped) through the hole in the body where there used to be, and position the stripped end over the central battery contact (-) secure this with the wad of tissue and replace the bottom of the light (having removed the original batteries.) This should hold the
wire pretty securely on the contact area (if you want a permanant mod, you may be able to solder this.
Now, the magnet in the body should hold the light relatively securely on the positive side of a battery (assuming it has a steel case, of course.) The remaining magnet will hold the other end of wire relatively securely on the negative side of the battery. Done.
LED jewelery with only low voltage LEDS (red, yellow, oldstyle green) do nicely on a 123A primary li battery, too (3V)
Pictures soon, maybe.
billW
