zener diode tester schematic

Posted on Feb 5, 2014

Using electronic scheme below can be designed a zener diode tester using few electronic parts. Using this zener tester and a multimeter can be measured and determined with a high precision threshold voltage of a zener diode. Zener voltage can be read with a DC voltmeter connected in parallel with zener diode. If contact S1 is closed, the resistance

zener diode tester schematic
Click here to download the full size of the above Circuit.

R1, T1 and Zener diode current flow. Base transistor T1 is connected to power supply trough the R4, so the transistor conducts. Zener current is equal to the ratio of base-emitter voltage of Q2 and the resistance value R1. With a supply voltage of 25 volts at the actuation keys S1-S3, the current through zener diode take values of about 2. 2, 6 and 22mA. Resistances R2 and R3 or a combination of R1, R2, R3 can be connected in place of R1 with S2-S3 so that through the zener diode constant current flow.

Leave Comment

characters left:

New Circuits



Popular Circuits

Ultrasound Detector with 567PLL and LM386 ICs
Car Courtesy Light
PIC 16F88 Digital Thermometer Light Meter and resistance ohm meter
direct coupled discrete astable
RS232 Dev Board
electronic circuit amplifier
LED Drive using TPS61042
UPB1009K Necs Low Power Gps Rf Receiver Bipolar Analog Integrated Circuit
Introducing DOGZILLA
Nickel-cadmium battery charger LM324 constituted
UPC1651 FM wireless microphone circuit
External audio spectrum display circuit diagram