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By TickTockTony
I have an output from a magnetic sensor coil. Its a sign wave pulse voltage of + - 200mv. That's too small to trigger a transistor. What device would you recommend to sense the pulse?

Thanks in advance for your time.
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By TS-Chris
200mv is plenty large a signal for most any transistor.

You either need a different transistor or to cascade the transistors you're using now in a darlington configuration to further amplify the output.

Another option would be to use an op-amp.