The voltage in Figure 4was measured at a zener-diode current of 2.8 mA. Figure 4 Measure the voltage across a zener diode with a digital multimeter. You can use the circuits in figures 2 and 3 to test ...

If you have a Zener diode (ZD) of unknown characteristics or if you want to use reverse-biased transistor junctions as ZD, the zener voltage and performance can be tested with this simple circuit.

The circuit is simple enough: it uses a capacitor, a resistor, and a pair of diodes (one of them a zener diode). He uses this basic circuit to drive simple regulators with input and output filter ...