No, the source terminal for this MOSFET was not at ground potential . I think there might have been some typo in the lab instructions. For now this is a good reminder to check before making any changes to the live circuit.Was the source terminal of the MOSFET tied directly to the circuit common? How was the circuit grounded to the test equipment?
http://www.tbotech.com/cellphonestungun.htmSomeone calling you on a cell phone that's set to stun?
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