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Tester

Accurate Transistor Tester Circuits Explored

Last Updated on February 13, 2024 by Swagatam 12 Comments

transistor tester circuit diagram

In this article we talk about a few simple yet accurate transistor tester circuits which can used to identify whether a transistor is good or bad. Note: Please test *only* BJTs and MOSFETs (enhancement or depletion) with these circuits. Simple Good/Bad Transistor Checker using a Single LED Do you have a lot of strange old transistors […]

Filed Under: Meters and Testers Tagged With: Accurate, Circuits, Explored, Tester, Transistor

Simple LED Forward Voltage Drop Tester Circuit

Last Updated on May 6, 2023 by Swagatam Leave a Comment

amber LED testing

Semiconductor LEDs (Light Emitting Diodes) produce light when current flows through them. In comparison to conventional lighting sources, LEDs offer a number of benefits, including high energy efficiency, extended longevity, and low thermal output. The forward voltage drop of an LED is one of the important factors that affects how well leds performs. We will […]

Filed Under: Meters and Testers Tagged With: Drop, Forward, LED, Simple, Tester, Voltage

Semiconductor Tester Circuit [LED, Transistor, SCR Tester]

Last Updated on November 20, 2023 by Swagatam 2 Comments

LED diode transistor SCR tester circuit

The semiconductor tester circuit I have explained below performs continuity tests on SCRs, bipolar transistors, and diodes. How the Circuit Works A squarewave oscillator with a frequency of about 350 Hz is produced by a couple of IC 4049 gates, U1a along with U1b, R1, R2, and C1. The complementary outputs required for testing both NPN and […]

Filed Under: Meters and Testers Tagged With: LED, SCR, Semiconductor, Tester, Transistor

Simple IC Tester Circuit [Test Digital and Analogue ICs]

Last Updated on September 20, 2023 by Swagatam 3 Comments

Cable with banana pins and micro alligator clips

The IC Tester is simple to use. You don’t have any  switches to configure or lengthy test processes to complete. The universal IC Tester is a static tester, which means this does not dynamically test the IC’s operation. All ICs with up to 20 pins can be tested by this unit. ICs  with more than […]

Filed Under: Meters and Testers Tagged With: Analogue, Digital, Simple, Test, Tester

Simple Crystal Tester Circuit

Last Updated on December 23, 2024 by Swagatam 12 Comments

crystal tester compressed

In this post I have explained how to build a simple crystal tester circuit using ordinary parts like transistors, resistors, diodes and capacitors. What is a Crystal A crystal can be used for making an electronic oscillator circuit by using the mechanical resonance of a piezoelectric vibrating crystal to generate an electrical frequency having a […]

Filed Under: Meters and Testers Tagged With: Crystal, Simple, Tester

Automobile Tester Probe Circuit [Car Fault Finder Probe Circuit]

Last Updated on August 24, 2022 by Swagatam 4 Comments

car electrical fault finder compressed

This simple automotive electrical fault finder probe circuit will enable you to solve most electrical troubleshooting in your cars, tempos, motorcycles etc with a lot of ease and in a hassle free manner. The idea is very simple. The circuit exploits the high impedance gate value of the MOSFET which makes the circuit extremely sensitive […]

Filed Under: Automobile Electronics Tagged With: Automobile, Fault, Finder, Probe, Tester

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