modified 5 years ago

Cold Forward Voltage Failure

00:52:42

The zener and the regular diode attempt to simulate a Diode in real life (with forward bias voltage).  This forward bias voltage changes with temperature (on the order of raising by 25mv per degree K lowered).  Raise the breakdown voltage on the zener diode to simulate a cold environment (and see how the pull up resistor becomes ineffective (raises the resistance)).  The point at which the pull-up resistor becomes ineffective is when the LED starts blinking, and this is when the circuit fails.

published 5 years ago

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