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Newly Updated Circuit Projects:

Solving Inverter “No Load Auto-Shutdown” Problem

Last Updated on July 10, 2025 by Swagatam 14 Comments

no2Bload

In this post I have explained how to trick an inverter’s “no load auto-shutdown” feature through an external circuit so that the inverter may be kept running even with minor, below permissible loads at the output. The idea was requested by Mr. Em. Technical Specifications Thanks for your prompt responses and guidance. I was wondering […]

Filed Under: Inverter Circuits Tagged With: Auto, Inverter, Load, Problem, Shutdown, Solving

Cheap Cellphone Controlled Water Pump for Farmers

Last Updated on July 6, 2019 by Swagatam 98 Comments

farmerpumpcontrol

The post presents a cheap cellphone remote controlled water pump circuit which allows farmers (user) to switch ON their field water pump without practically visiting the spot, thus saving precious time and energy for the individual. The idea was requested by one of the dedicated members of this blog. Inexpensive Cellphone Water Pump Starter This […]

Filed Under: Remote Control Circuits, Water Controller Tagged With: Cellphone, Cheap, Controlled, Farmers, Pump, Water

Lipo Battery Balance Charger for Charging of Series Connected Lipo Cells

Last Updated on May 17, 2026 by Swagatam 97 Comments

lipo2Bscan

In this post I have explained a relatively easy lipo battery balance charger circuit which is designed to continuously scan and charge the connected cells of the battery. The idea was requested by Mr. Schindler and Mr. Emil Jan Thomas Baticulon.  Charging 6 Li-Po Packs The concepts are very well written, concise and clear. Thank […]

Filed Under: Battery Charger Circuits Tagged With: Balance, Battery, Charger, Charging, Lipo, Series

Petrol to LPG ATS Circuit using Solenoid Changeover Valve

Last Updated on May 21, 2026 by Swagatam 32 Comments

ATSsolenoid 1

In this post I have explained a simple mains to generator automatic transfer switch (ATS) which features an initial petrol start which switches to an LPG gas supply via fuel valve changeover switches. The idea was requested by Mr. Junaid. Technical Specifications sir i want to make my generator automatic start on petrol then shift […]

Filed Under: Grid and 3-Phase Tagged With: ATS, Changeover, LPG, Petrol, Solenoid, Valve

5 Simple Siren Circuits you can Build at Home

Last Updated on May 16, 2026 by Swagatam 14 Comments

20150812 183122 2

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

Detecting Static Human with PIR

Last Updated on April 1, 2021 by Swagatam 26 Comments

output duy7jP

In this post I have explained a method which can be probably used for enhancing a passive infrared sensor ability to detect even a static or stationery human presence. This feature is normally not possible with the conventional PIR sensors. How PIR Detect Human Presence I have already discussed many PIR based motion detector applications […]

Filed Under: Security and Alarm Tagged With: Detecting, Human, PIR, Static

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