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Newly Updated Circuit Projects:

High Current Li-Ion Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam 205 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

12V, 5 Amp SMPS Battery Charger Circuit

Last Updated on May 17, 2026 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

Battery Charging Fault Indicator Circuit

Last Updated on May 17, 2026 by Swagatam 130 Comments

li ionfaultindicator

In this article I have explained a battery status indicator circuit which can be also used as a battery charging fault indicator circuit. The idea was requested by Mr. Faizan. The Design The idea presented here takes care of all the parameters required for charging a battery ideally and safely. Referring to the shown battery […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charging, Fault, Indicator

Super Capacitor Charger Theory and Working

Last Updated on May 17, 2026 by Swagatam 241 Comments

supercapacitorchargercircuit

In this post I have explained a super capacitor charger circuit for charging super capacitors which converts a 12V car battery voltage to an elevated 16V for charging a bank of super capacitors. The idea was requested by Miariver. Super Capacitor for Peak Power Compensation  First thanks for keep publishing this blog is very helpful, […]

Filed Under: Battery Charger Circuits Tagged With: Capacitor, Charger, Super, Theory, Working

Battery Charger for Positive Earth Cars

Last Updated on May 17, 2026 by Swagatam 4 Comments

positive battery charger circuit

The post presents an 6v or 12v battery charger circuit for positive earth cars which could be used for upgrading 6V positive earth cars, facilitating an external 12V battery to be used in them along with the existing 6V battery with a common positive earth body. The idea was requested by Mr. Joe Ceretti. 6V […]

Filed Under: Automobile Electronics, Battery Charger Circuits Tagged With: Battery, Cars, Charger, Earth, Positive

Designing a Customized Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam 164 Comments

LM338 basic adjustable power supply circuit diagram

I have designed and published a variety of battery charger circuits in this website, however the readers often get confused while selecting the right battery charger circuit for their individual applications. And I have to explicitly explain each of the readers regarding how to customize the given battery charger circuit for their specific needs. This […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charger, Customized, Designing

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