After getting a feel for how temperature in metals change due to a hand touch, I had a great idea for my Circuits 1 class today. I want to use a differentiating OP AMP (with a very very high gain) and a temp. sensor, to make a touch pad. My local electronics store cant think of a good way to do this So, to the forums I go. The restrictions are this: a) it cant be so complex (it is circuits 1), b) I want a device that will receive my momentary spike of voltage, consequently turning "on" or "allowing" another voltage source to do its thing (turn on a fan in my case, that will in turn be auto regulating to the temp of a heat sink).
In a nutshell:
I need a switch that flips on/off from a voltage spike.
In a nutshell:
I need a switch that flips on/off from a voltage spike.
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