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Battery

Battery Cut Off Charger Circuit Using a Single Relay

Last Updated on May 17, 2026 by Swagatam 31 Comments

simplestbatterychargercircuit

Amazed to hear this! Yep that’s actually possible, you would need only one relay and a handful of diodes to make a simplest one relay automatic battery charger circuit. How it Works The idea struck me while trying to design the easiest possible battery charger circuit for one my clients. The concept is simple; just […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charger, Relay, Single

Charging a Small NiMh Battery from Air

Last Updated on May 20, 2026 by Swagatam 1 Comment

charging NiMh battery from air 2

In this post we will try to investigate a circuit which can charge a small Ni-Mh battery by extracting radiant energy from the ether or air. I have explained more Discussing how to Derive Free 9V from Air – By Steven Chiverton Mr. Steven has devised an ingenious way of collecting energy from the air […]

Filed Under: Energy from Magnets and Earth Tagged With: Battery, Charging, NiMH, Small

Low Battery and Overload Protection Circuit for Inverters

Last Updated on December 18, 2024 by Swagatam 254 Comments

overload protector circuit

A very simple low battery cut-off and overload protection circuit has been explained here. The figure shows a very simple circuit set up which performs the function of an overload sensor and also as an under voltage detector. In both the cases the circuit trips the relay for protecting the output under the above conditions. […]

Filed Under: Inverter Circuits Tagged With: Battery, Inverters, Overload, Protection

3 Simple Battery Desulfator Circuits Explored

Last Updated on August 21, 2026 by Swagatam 398 Comments

batterydesulfatorcircuit

In this article we investigate 3 simple yet powerful battery desulfator circuits, which can be used to effectively remove and prevent desulfation in lead acid batteries. The first method uses PWM pulses from a 555 PWM circuit using existing battery power itself, the second concept involves high voltage spikes, while the third design discusses desulfation […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Circuits, Desulfator, Explored, Simple

9 Simple Solar Battery Charger Circuits

Last Updated on March 31, 2026 by Swagatam 542 Comments

garden2Blight

Simple solar charger circuits are small devices which allow you to charge a battery quickly and cheaply, through solar panels. A simple solar charger circuit must have 3 basic features built-in: In this post I will comprehensively explain nine best yet simple solar battery charger circuits using the IC LM338, transistors, MOSFET, buck converter, etc […]

Filed Under: Solar Controller Circuits Tagged With: Battery, Charger, Circuits, Simple, Solar

Recovering Electrical Energy from Alternator and Battery

Last Updated on May 20, 2026 by Swagatam 39 Comments

bifilarcoilcircuit

A request was sent to me by one of the readers Mr. Edward Pizzo, regarding solving a circuit issue. The idea refers to a very interesting concept of acquiring free energy through a mechanism which once initiated keeps running  in quite a perpetual fashion. Using an Alternator and two Batteries A charged battery #1 is used initially for […]

Filed Under: Energy from Magnets and Earth Tagged With: Alternator, Battery, Energy, Free

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