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AVR inputs

2009-07-29 by Brian

I made a module for a car to monitor inputs. Since inputs can only be VCC +/-0.5V for a high signal, how do you keep the inputs from getting to the micro before VCC is applied? It keeps blowing my inputs so they dont work.

One thing I thought about is using a mosfet switch controlled by an output of the micro to allow the signal only once it is started up.

Brian

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