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Explained

7 Simple Continuity Tester Circuits Explained

Last Updated on June 8, 2026 by Swagatam 43 Comments

simplecontinuitytestercircuit

If you are looking for a simple circuit to test continuity of wires and long conductors, the explained 7 easy to build continuity circuits are the ones which you can try and might fulfill your requirement. What is a Continuity Tester A continuity tester is a device which is used for identifying the correct continuity […]

Filed Under: Meters and Testers Tagged With: Circuits, Continuity, Explained, Simple, Tester

Simple Delay Timer Circuits Explained

Last Updated on January 2, 2024 by Swagatam 712 Comments

In this post I have explained the making of simple delay timers using very ordinary components like transistors, capacitors and diodes. All these circuits will produce delay ON or delay OFF time intervals at the output for a predetermined period, from a few seconds to many minutes. All the designs are fully adjustable. Importance of […]

Filed Under: Timer and Delay Relay Tagged With: Circuits, Delay, Explained, Simple, Timer

Simplest Piezo Driver Circuit Explained

Last Updated on May 15, 2026 by Swagatam 47 Comments

piezodrivercircuit1

In the previous post I explained a piezo transducer element and learned how to use it with electronic circuits. In this article we will see how a piezo tranducer can be driven or operated using a simple circuit. As discussed earlier a piezo transducer basically requires a frequency to vibrate and reproduce the required sound. […]

Filed Under: Audio and Amplifier Projects Tagged With: Driver, Explained, Piezo, Simplest

2 Best Long Duration Timer Circuits Explained

Last Updated on January 19, 2025 by Swagatam 191 Comments

long duration timer circuit

In this post I have explained how to make 2 accurate long duration timer circuits ranging from 4 hours to 40 hours, which can be upgraded further for getting even longer delays. The concepts are fully adjustable. A timer in electronics is essentially a device which is used for producing time delay intervals for switching […]

Filed Under: Timer and Delay Relay Tagged With: Best, Circuits, Duration, Explained, Long, Timer

4 Simple VU Meter Circuits Explained

Last Updated on June 8, 2026 by Swagatam 50 Comments

music light

In this post I have explained how to build 4 interesting VU meter circuits, using LEDs and using a moving coil meter. What is a VU Meter VU meter or a volume unit meter circuit is a device used for indicating the music volume output from an amplifier or a loudspeaker system. It may be […]

Filed Under: Meters and Testers Tagged With: Circuits, Explained, Meter, Simple, VU

IC 7805, 7812, 7824 Pinout Connection Explained

Last Updated on October 16, 2022 by Swagatam 40 Comments

78XX voltage regulator range of ICs

In this post I have explained how to connect common 78XX voltage regulator ICs such as 7805, 7812, 7824 etc for getting fixed regulated output voltages at 5 V, 12 V, or 24 V outputs respectively. The input voltage must be at least 3 V higher than the desired output voltage. For example, if a […]

Filed Under: Power Supply Circuits Tagged With: 7805, 7812, 7824, Connection, Explained, Pinout

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