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Circuits designed by David Johnson, P.E.
Last Updated on: Wednesday, October 18, 2017 05:04 AM

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More  Temperature Sensor Circuits

More details found in DC Magazine


Temperature Sensitive MOSFET
designed by David A. Johnson, P.E.


Recently I was asked by a company to discover why one of their products failed to operate properly in cold temperatures.  A simplified version of the circuit is shown below.

Two n-channel MOSFETs and a few resistors are wired to form a flip/flop latch circuit.  Each time the pushbutton switch is pressed, the circuit changes state and remains in that state until another activation of the switch.

More  Temperature Sensor Circuits

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