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Get one of the little key chains that have a button that send a signal that buzzes on the keys (so you can find the keys).<p>You are going to have legal problems with the explosive in a classroom. This isn't 1960. In this day and age all sorts of "class c fireworks" laws have been ennacted.<p>I reco...
Thanks for the web page reference. The article was very interesting. I am primarily interested in a single chip that can be used to blink an LED with each heartbeat, rather than an actual EKG.
I am looking for a very simple way to blink a light or make a display every time the human heart beats. I have looked at the OPO7 chip, but do not know of an output device or circuit. I am new to this. Any suggestions?