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Charger

Simple 48V Automatic Battery Charger Circuit

Last Updated on December 11, 2025 by Swagatam 422 Comments

The proposed 48 V automatic battery charger circuit will charge any 48 V battery up to an optimal 56 V full charge level, utilizing very ordinary components. The circuit is highly accurate with  its over charge cut off features. Circuit Description: As shown in the circuit diagram, the main element in the circuit is the opamp IC 741, which has been arranged as a comparator. Pin#3 […]

Filed Under: Battery Charger Circuits Tagged With: 48V, Automatic, Battery, Charger, Simple

Op Amp Battery Charger Circuits with Auto Cut Off

Last Updated on November 19, 2025 by Swagatam 409 Comments

In this post I have explained a two op amp IC 741 and LM358 based auto cut off battery charger circuits which are not only accurate with its features but also allows a hassle free and quick setting up of its high/low cut-off threshold limits. High current batteries can e also charged using these circuits. […]

Filed Under: Battery Charger Circuits Tagged With: Auto, Battery, Charger, Circuits

High Current Li-Ion Battery Charger Circuit

Last Updated on October 23, 2025 by Swagatam 201 Comments

universalli ionchargercircuit

In this post I have explained a high current Li-Ion battery charger circuit which can be used for charging any high current, such as 2S3P, 3S2P battery packs. It can be also used for charging other similar high Ah rated Li-ion battery from a car or a truck battery. The idea was requested by Mr. […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charger, Current, High

3.7 V Li-Ion Battery Charger Circuit with Automatic Cut-off

Last Updated on October 14, 2025 by Swagatam 401 Comments

Li ion USB charger circuit

In this article we study a simple 3.7V li-ion battery charger circuit with auto-cut off, which can be charged from your computer USB port or any other 5 V regulated source. Simplest 3.7V Li-ion Battery Charger with Auto Cut-off using LM393 IC If you do not wish to read the following long explanation, you can […]

Filed Under: Battery Charger Circuits Tagged With: Automatic, Battery, Charger

Convert SMPS into a Solar Charger

Last Updated on September 27, 2025 by Swagatam 51 Comments

chargingbatteryfromsmpssolarchargercircuit.

In this post I have explained how to convert smps into a solar charger circuit. The method will result in an extremely efficient and fast solar charging of the connected battery. SMPS Solar Chargers SMPSs have become very common nowadays and we find them being used in the form of AC to DC adapters wherever […]

Filed Under: Battery Charger Circuits, Solar Controller Circuits Tagged With: Charger, Convert, SMPS, Solar

Dual Battery Charger Circuit with Isolator

Last Updated on July 13, 2025 by Swagatam 96 Comments

battery1battery2changeovercircuit

In this post I have explained an innovative automatic dual battery charger with isolator circuit for alternators and engines, which allows monitoring of the charge levels of two individual batteries, and switching them across the loads appropriately. [New Entry] Single Op amp Dual Battery Charger Circuit The circuit working for the above single op amp […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charger, Dual, Isolator

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