Zener test circuit serves as dc source


Posted on Jun 12, 2012

This Design Idea describes a versatile test circuit for zener diodes after yet another misread zener diode had infiltrated the ranks of 1N4148 diodes assembled on a pc board. As a bonus, the circuit can serve as a moderate-voltage, power-limited adjustable dc source. Although conventional multimeters` resistance ranges typically apply enough voltage to forward-bias most diodes, few can drive a zener diode into reverse conduction.






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