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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

3 Laser Beam Controlled Circuits Explored

Last Updated on January 20, 2025 by Swagatam 12 Comments

laser door bell circuit

A compact, battery-powered transmitter emits a LASER beam when the control push button is activated. The beam is frequency-coded to provide a maximum level of reliability in transmission. The receiver can be located at a considerable distance from the transmitter (up to several tens of meters). The light beam, by definition, remains highly focused, and […]

Filed Under: Remote Control Circuits Tagged With: Beam, Circuits, Controlled, Explored, Laser

2 Simple RF Detector Circuits Explored

Last Updated on January 19, 2025 by Swagatam 4 Comments

RF detector circuit using transistors

In this article I have explained a couple of very easy to build RF detector circuits, which can be used to sense or detect or sorts of Rf electrical noise that may be floating in the surrounding atmosphere. What is RF RF stands for radio frequency, which is a kind of electrical interference transmitted in […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Detector, Explored, RF, Simple

Simple Voltage Multiplier Circuits Explored

Last Updated on April 19, 2023 by Swagatam 10 Comments

half wave doubler

In this article I have explained how an input AC source could be increased to any desired levels using simple voltage multiplier circuits, built with capacitors and diodes. Thus the basic function of a voltage multiplier circuit is to multiply a given AC voltage source to any higher desired level, simply by adding the relevant […]

Filed Under: Power Supply Circuits Tagged With: Circuits, Explored, Multiplier, Simple, Voltage

10 Useful Active Filter Circuit Diagrams Explored

Last Updated on January 17, 2025 by Swagatam 13 Comments

Figure1

In this post I will comprehensively discuss 10 different types of active filter circuits which can be used for filtering music and audio with the desired levels of bass and treble effects. We also learn about their working, types, characteristics, and practical applications circuits. Contributed By: Ken Madison In audio signal processing circuits, filters are used […]

Filed Under: Audio and Amplifier Projects Tagged With: Active, Diagrams, Explored, Filter, Useful

9 Simple Sine Wave Generator Circuits Explored

Last Updated on August 26, 2024 by Swagatam 19 Comments

transistorized phase shift oscillator sine wave generator circuit compressed

A sine wave generator is actually a sine wave oscillator circuit which generates an exponentially rising and falling sinusoidal waveform. The 9 simple sine wave generator circuits presented in the following article are easy to build, since they incorporate a small number of ordinary electronic components, and can be used for generating an exponentially varying […]

Filed Under: Oscillator Circuits Tagged With: Circuits, Explored, Generator, Simple, Sine, Wave

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