GitHub - dilshan/simple-zener-tester: PIC16F88 and MC34063 based Zener diode tester
Circuit lets you measure zener voltages and test LEDs - EDN
In this article, we have posted two different circuit to test zener diode using LM317. Circuit diagram, circuit description and parts list… | Diode, Circuit, Tester
Simple Diode Tester Circuit – ELECTRONICS AND CIRCUITS
Microcontroller based Diode and Bipolar Junction Transistor (BJT) tester | Embedded Lab