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I had a cheapo 29 led flash light with 3 AAA's in a holder. I went to a thrift store & wiped them out of TV remotes. I took out all the IR LED's from the remotes, then changed them out one by one until I had 29 IR LED's installed. Interesting because you don't know if it is off or on, and you have to hide it for people don't play with it & leave it on. I checked it out with my night vision, and it is not that bright, I am definitely going to have to increase the voltage, by adding a couple more batteries in series, so that is the tricky part, getting them nice & bright without over doing it & ruining the whole project.
Free sources for Infrared LEDs and photo transistors
control LEDSs using any infrared (TV) remote control
A FREE way to check infrared remote controls
See Infrared LED Light with an iPhone 4...
IR Remote Control Jammer
Magic Wand TV Remote
Use an infrared phototransistor
TV Remote Jammer
Posted:Jul 22, 2013
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