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5 Useful Power Failure Indicator Circuits Explained

Last Updated on February 18, 2024 by Swagatam 49 Comments

power failure indicator circuit diagram

In this post I have explained 5 useful power supply failure indicator circuits which can be used to get an instant indication regarding an input power failure situation. This post includes the following 5 types power failure indicator circuits: Main Function The main function of the proposed power failure indicator circuits is to alert or […]

Filed Under: Indicator Circuits Tagged With: Circuits, Explained, Failure, Indicator, Power, Useful

3 Useful Temperature Alarm Circuits Explained

Last Updated on September 25, 2023 by Swagatam 15 Comments

temperature alarm circuit diagram

In this post I have explained the working of 3 interesting and useful temperature alarm circuits through detailed circuit diagrams. A temperature alarm circuit is basically a device which is designed to detect a temperature threshold and sound an alarm as soon the temperature exceeds over, or drops below the desired temperature detection threshold. 1) […]

Filed Under: Temperature Controllers Tagged With: Alarm, Circuits, Explained, Temperature, Useful

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

6 Useful Voltage Controlled Oscillator Circuit Explored

Last Updated on October 26, 2021 by Swagatam 9 Comments

VCO compressed

In this post I have explained how to build 6 useful voltage controlled oscillator circuits, using various op amps and integrated circuits. As the name suggests, a voltage controlled oscillator or a VCO circuit is an oscillator circuit whose output frequency can be controlled or varied through an adjustable control voltage input. This means, if […]

Filed Under: Oscillator Circuits Tagged With: Controlled, Explored, Oscillator, Useful, Voltage

4 Useful Logic Probe Circuits Explored

Last Updated on September 10, 2023 by Swagatam 8 Comments

logic probe characteristics

These simple yet versatile 4 LED logic probe circuits can be used to test digital circuit boards such as CMOS, TTL or similar for troubleshooting the logic functions of the ICs and the associated stage. What is a Logic Probe A logic probe circuit is a handheld electronic tool which can be used to test […]

Filed Under: Meters and Testers Tagged With: Circuits, Explored, Logic, Probe, Useful

10 Useful Function Generator Circuit Diagrams Explained

Last Updated on January 17, 2025 by Swagatam 23 Comments

function generator circuit

In this post I have explained how to build 10 simple yet useful function generator circuits using IC 4049, IC 8038, IC 741, IC 7400, transistors, UJTs etc. for generating accurate square waves, triangle waves, and sinewaves through easy switch operations. 1) Using IC 4049 Using only one low-cost CMOS IC 4049 and a handful […]

Filed Under: Meters and Testers Tagged With: Diagrams, Explained, function, Generator, Useful

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