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Newly Updated Circuit Projects:

Astable Multivibrator Circuit Using NAND Gates

Last Updated on May 20, 2026 by Swagatam 4 Comments

Astable Multivibrator Circuit Diagram Using IC 4093 NAND Gate2C Image

An astable multivibrator is referred to an electronic configuration which is able to generate continuous alternate high and low pulses from a couple of outputs, operating in tandem. Why IC 4093 You might have well come across such astable circuits using a couple of transistors, a couple of capacitors and a few resistors.However more simpler […]

Filed Under: Electronics Theory Tagged With: Astable, Gates, Multivibrator, NAND

How to Use an Op amp as a Comparator Circuit

Last Updated on May 20, 2026 by Swagatam 56 Comments

op amp working

In this post I will comprehensively explain how to use any opamp as a comparator in a circuit for comparing a input differentials and producing the corresponding outputs. What is an Op amp Comparator We’ve been using an op amp IC probably since we started learning electronics, I am referring to this wonderful little IC […]

Filed Under: Electronics Theory Tagged With: Comparator

How an Inverter Functions, How to Repair Inverters – General Tips

Last Updated on May 20, 2026 by Swagatam 814 Comments

inverter

In this post we will try to learn how to diagnose and repair an inverter, by comprehensively learning the various stages of an inverter, and how a basic inverter functions. Before I have explained how to repair an inverter it would be important for you to first get fully informed regarding the basic functioning of […]

Filed Under: Electronics Theory, Inverter Circuits Tagged With: Functions, General, Inverter, Inverters, Repair, Tips

High Current Voltage Doubler Circuit

Last Updated on May 20, 2026 by Swagatam 18 Comments

highcurrentvoltagedoublercircuit

In this post I have explained a voltage high current doubler circuit which will almost double the voltage that’s been applied at the input (up to 15V max), and also it becomes specifically useful since it allows higher current loads to be used at the output, in the order 10 amps. Since the voltage doubler […]

Filed Under: Electronics Theory Tagged With: Current, Doubler, High, Voltage

Calculate Battery, Transformer, MOSFET in Inverter

Last Updated on May 20, 2026 by Swagatam 105 Comments

In this post I have explained how to correctly calculate inverter parameters with associated stages such as battery and transformer, by calculating the matching the parameters correctly. Introduction Making an inverter all by yourself can be definitely lot of fun. However if the results are not satisfactory can completely spoil the whole purpose of the […]

Filed Under: Electronics Theory Tagged With: Battery, Calculate, Inverter, MOSFET, Transformer

How to Connect a Relay through an Opto-Coupler

Last Updated on May 20, 2026 by Swagatam 56 Comments

opto coupler relay driver circuit

In the following post I have explained how to drive a relay by using an isolated method, or through an optocoupler device. We will learn three methods, first method is by connecting relay directly with the optocoupler output pins, second method is by using external PNP transistors, and third method is by using external NPN […]

Filed Under: Electronics Theory Tagged With: Connect, Coupler, Opto, Relay, through

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