Transistor Testers

Simple Current Tester

Simple Transistor Tester (3 components)
by Heilman Hackatronics - Published on Jun 2, 2014
Transistor-Tester-Circuit-008.png

* 50k ohm Potentiometer
* 470 ohm Resistor
* Red LED
* 5vdc power supply
3:21


how to make a transistor tester
by DPV TECHNOLOGY - Published on Feb 11, 2018
Transistor-Tester-Circuit-015.png

# 1x 5mm LED
# 2x 100 resistor
# 1x switch
# 1x 9v power supply
6:59


Testing Transistor NPN with LED circuit at home
by Innovation KH - Published on Dec 24, 2016
Transistor-Tester-Circuit-018.png

# 1x LDR
# 1x 470 ohm Resistor
# 1x 1k ohm Resistor
# 1x 5mm LED
# 1x 5v power supply
11:18


555 timer based


Many of these projects use the classic 555 Transistor Tester Circuit from 555-timer-circuits.com. Also available on this wiki.

Transistor Tester using 555 Timer
by Circuit Digest - Published on May 15, 2015
Transistor-Tester-Circuit-001.gif

blog
* +9V supply voltage
* 555 IC
* 1K ohm resistors (2 pieces), 2K2 ohm resistors
* 10K ohm pot or variable resistor
* 100µF capacitor
* LED
* Transistor (that needed to be tested)
1:03

TRANSISTOR TESTER USING IC NE555
by Master projecboard - Published on Oct 17, 2017
Transistor-Tester-Circuit-004.jpg

blog Translated
# IC NE555 1 piece
# Elco 10uF 1 piece
# Resistor 100, 1k, 2k2 @ 1 piece
# 1 LED
# 9V 1 piece battery
1:53

How to Test Transistor | pnp npn | 555 timer | Simple Circuit | DIY | Transistor Tester
by Circuit DIY - Published on May 18, 2018
Transistor-Tester-Circuit-005.png

blog
* +9V supply voltage
* 555 IC
* 1K ohm resistors (2 pieces), 2K2 ohm resistors
* 10K ohm pot or variable resistor
* 100µF capacitor
* LED
* Transistor (that needed to be tested)
2:03

Transistor tester DIY | School Project | Simple Transistor tester Using IC 555 Timer | "makeit"
by make it - Published on Aug 25, 2018
Transistor-Tester-Circuit-009.png

✅IC 555
✅47K
✅4 × 220R
✅2 × 1n4148 diode
✅RED & GREEN led
✅3 PIN CONNECTOR
3:29

How to make a Transistor Tester using 555 timer IC
by Creative Stuff - Published on Jul 30, 2018
Transistor-Tester-Circuit-011.jpg

# 1x zero PCB
# 1x NE555 timer IC
# 2x 5mm LED
# 2x 1N4148 diode
# 4x 220E resistor
# 1x 33K resistor
# 1x 10uf capacitor
# 1x 9v powersupply
5:37

10) Battery Connector(1x)
11) Push Button(1x) || 8:09 ||

Complementary Pair


Simple Transistor Tester
by HackaweekTV - Published on Sep 1, 2011
Transistor-Tester-Circuit-010.png

# 1x 5mm LED
# 1x 22 resistor
# 1x 1k resistor
# 1x 330k resistor
# 1x NPN transistor
# 1x PNP transistor
# 1x 3v power supply
4:49

DIY Transistor Tester
by learnelectronics - Published on Mar 12, 2018
Transistor-Tester-Circuit-014.png

# 1x 5mm LED
# 1x 220 resistor
# 1x 1k resistor
# 1x 22k resistor
# 1x NPN transistor
# 1x PNP transistor
# 1x 3v power supply
6:53

Inverted Power


Simple and Easy Transistor Tester under 30Rs
by Sheetal Chintapatla - Published on Jun 24, 2017
# 1x 5mm LED (red and blue)
# 1x 22 resistor
# 1x 10k resistor
# 1x 270k resistor
# 1x test switch
# 2 pole 2 way switch
# 1x 9v-12v powersupply
5:44

Multi-meter

coming

MOSFET

coming

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