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Solar, Wind, Hybrid Battery Charger Circuits

Last Updated on October 20, 2023 by Swagatam 225 Comments

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In this article I have explained a dual input hybrid solar and wind battery charger circuit using cheap and ordinary components. The idea was requested by one of the interested members of this blog. Technical Specifications Good after noon sir am designing a ” Solar and Wind energy harvest regulator circuit” which has two inputs […]

Filed Under: Solar Controller Circuits Tagged With: Battery, Charger, Circuits, Hybrid, Solar, Wind

5 Simple Siren Circuits you can Build at Home

Last Updated on May 16, 2026 by Swagatam 14 Comments

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In this post I have explained about a 5 simple siren circuits, using Arduino and also with ordinary components such as transistors and capacitors yet is able to produce an alarm sound at an excruciating level. The idea was contributed by “Abu-Hafss” Deeper in the article we also learn to make an advanced Arduino based […]

Filed Under: Automobile Electronics Tagged With: Build, Circuits, Home, Simple, Siren

3 Sound Activated Switch Circuits Explained

Last Updated on July 10, 2025 by Swagatam 131 Comments

In this post I have explained 3 simple sound activated relay switch circuits which can used as a module for any system that might be assigned to trigger by detecting some kind of sound pressure level. Or simply applications  such as a  voice activated alarm security circuit. 1) Circuit Objective Utilizing this basic sound activated […]

Filed Under: Sensors and Detectors Tagged With: Activated, Circuits, Explained, Sound, Switch

Motorcycle Voltage Regulator Circuits

Last Updated on September 13, 2026 by Swagatam 243 Comments

mosfetregulatorcircuit3phase

In the article below I have explained a compilation of simple yet accurate motorcycle voltage regulator circuits, which can be used for regulating the varying alternator voltage into a fixed DC voltage. Voltage regulator circuit is very important in motorcycles and two wheelers since they ensure a regulated battery charging thus keeping the battery safe […]

Filed Under: Automobile Electronics Tagged With: Circuits, Motorcycle, Regulator, Voltage

3 Automatic Fish Aquarium Light Optimizer Circuits

Last Updated on June 1, 2026 by Swagatam 3 Comments

solarfishaquariumlightoptimizercircuit

In this post I have explained a 3 beautiful fish aquarium light optimizer circuits your fishes will love. These are designed to automatically control the illumination of a group of appropriately selected LEDs with respect to the varying daylight and after darkness sets in. The first idea was requested by Mr. Amit 1) Sun light […]

Filed Under: Lamps and Lights Tagged With: Aquarium, Automatic, Circuits, Fish, Light, Optimizer

Timer Circuits with Auto Pause and Memory During Power Failures

Last Updated on July 6, 2019 by Swagatam 35 Comments

timerpowermainsfailurecorrection

In this post we try to investigate a couple of  innovative solutions which could be used for pausing the counting process of a timer IC during power failures, and also restart the process when mains is restored, ensuring a continuous functioning of the timer without errors. The idea was requested by Mr. Arun Dev. Technical […]

Filed Under: Timer and Delay Relay Tagged With: Auto, Circuits, During, Memory, Pause, Timer

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