Made a circuit to turn a motor on for a short time when a button is pressed. We had a bunch of 3904s lying around and no power transistors, but we had a bunch of these 5V relays, so I used a 3904 and a relay. The motor is going to be overvolted and overworked pretty hard I suspect. Fun stuff, actually had to do some calculations and look up values in data sheets to figure out the sizing of the resistors. Not that I knew how, much thanks to the internet and www.kpsec.freeuk.com.
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