Long life flashing LED
October 21, 2006 7:39 AM Subscribe
Any suggestions for a small, battery-powered flashing LED setup I can use for an outdoor mock alarm?
posted by pallen123 to Technology (5 answers total)
I have a faceplate I'd like to turn into a simple mock alarm system status indicator. Need a flashing LED bright enough to be seen from 20 yards, but either low enough power consumption that I can keep the thing flashing 24/7 for hopefully at least a year (before needing to change battery) or a circuit that somehow incorporates a simple evening timer or light sensitive switch. I'd like the whole setup to be as small as possible, and since I live in the Midwest, the power source needs to withstand zero degree temperatures. It's for a workshed that doesn't have any power, so I can't hardwire it to a real power supply.
Ideal would be:
- bright flashing LED
- smallest battery possible
- battery withstand cold
- longest lasting power setup possible
- photoelectric switch
- evening on/off timer
Greatly appreciate any suggestions!