For a project, I'm trying to build a pair of handheld devices, each with an LED and a button. With a range of 200 meters or so, I would like to be able to press the button on one of the devices, and turn on the light on the other. I'm thinking a good way of doing this would be using a crystal oscillator to produce CW or a 555-timer, but I imagine some amplification would be necessary too?
Thanks for all of your help. I'd be happy to place this elsewhere if I'm posting in the wrong forum.
Thanks for all of your help. I'd be happy to place this elsewhere if I'm posting in the wrong forum.
