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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

12V, 5 Amp SMPS Battery Charger Circuit

Last Updated on July 5, 2025 by Swagatam 500 Comments

12v2B52Bamp2Btransformerless2Bbattery2Bcharger2Bcircuit

In this article we study a simple flyback based converter design which is implemented as an SMPS 12V, 5amp battery charger power supply, without using a iron core transformer. How it Works The proposed 12V, 5 amp smps battery charger circuit employs a flyback converter topology which results in the required smps based high current, […]

Filed Under: Battery Charger Circuits, SMPS and Converters Tagged With: 12V, Battery, Charger, SMPS

BQ24295 Smart Battery Charger IC with Boost + OTG

Last Updated on May 29, 2025 by Swagatam Leave a Comment

This BQ24295 IC is like a super smart charger chip. This one is not just for charging battery, but also doing many other jobs like boost converter, USB detection, power path control, and even OTG (host power supply). So we can say that this is a full battery charging and power management IC. Let us […]

Filed Under: Battery Charger Circuits, Datasheets and Components Tagged With: Battery, Boost, BQ24295, Charger, OTG, Smart

How to Calculate Solar Panel, Inverter, Battery Parameters

Last Updated on May 5, 2025 by Swagatam 170 Comments

Grid Tie Inverter2C Wiring Details2C Diagram

In this post I have explained through calculations how to select and interface the solar panel, inverter and charger controller combinations correctly, for acquiring the most optimal results from the set up. Calculating Solar Panel, Inverter and Battery Charger Specifications For the sake of convenience, let’s believe you possess a a 100 watt appliance or […]

Filed Under: Battery Charger Circuits, Inverter Circuits, Solar Controller Circuits Tagged With: Battery, Calculate, Inverter, Panel, Parameters, Solar

3-Step Automatic Fast Battery Charger/Controller Circuit

Last Updated on April 30, 2025 by Swagatam 268 Comments

3stepbatterychargercircuit

Generally it is noticed that while charging batteries people hardly pay any special attention toward the procedures. For them charging a battery is simply connecting any DC supply with matching voltage with the battery terminals. A fast battery charger circuit charges a battery with enhanced speed so that it is charged in less time than the specified period. […]

Filed Under: Battery Charger Circuits Tagged With: Automatic, Battery, Charger, Controller, Fast, Step

IC 741 Low Battery Indicator Circuit

Last Updated on February 17, 2025 by Swagatam 211 Comments

Low voltage Indicator 1

The proposed circuit was requested by one of the avid readers of my blog. It is a low battery warning indicator circuit using op amp IC 741 and can be used for monitoring a particular low battery voltage threshold. Circuit Operation The circuit may be understood with the following points: The entire configuration is wired […]

Filed Under: Indicator Circuits Tagged With: 741, Battery, Indicator

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