Can anyone point me in the direction of making an LED light up when touched and then turn of either by touching again or a reset button?
My idea is to build a rather large matrix and be able to "draw" on the board lighting up the leds when they are touched. I figure it could be done with an IR Led and Receiver or using the led as a sensor.
Some circuit diagrams would be far more useful to me as i'm a bit of amateur and can't readily design my own circuits. Any kits etc that you could buy is also a bonus.
From what I've seen you need to charge the LED up with a small amount of charge then read the charge on the LED. Good keywords to Google are capacitance LED sensor
You may want to interface a conductive surface ( aluminum, steel or copper plate) to a one-shot or RS flip-flop driving the LED. Works best indoors due to stray AC field. CMOS ICs are best for this application, since you can use a 9V or 12V smoke alarm battery and make this project mobile.