Trying to make an LED Map, so placing an led anywhere on the map will make it light, any help?
I'm trying to make a map so that I can place an LED anywhere through it and it'll light up. Kind of like the old push pin method only the push pin is a single LED and I can place as many as I want on the map wherever it may be and it'll light up. I found one online but it's very expensive so I was trying to see if I can build one. The only thing I can find online that would help would be conductive foam but I don't know what to do with it, my guess would be to connect a ground pin and a positive pin into the foam, wire those up to a plug, plug it into the wall and the foam would send power anywhere leaving me to place the led through the map and into the foam and having the led light up. Here's a link to what I found online and I'd like to recreate it. Can anyone tell me how please?