I need a good way to turn a coil on/off with a 15ms delay.
I tried using a transistor, which turned out to be a mistake because I fried it. I believe this was either due to the current of my 9 volt battery or the voltage spike from turning the copper coil off. The transistor was rated at a max of 20v, so that was fine, but it was likely the spikes or the amperage.
The key is that I need to do it fast, so something like a relay would not work. If anyone has any advice, please let me know.