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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

Parallel Battery Charger Circuits Explained

Last Updated on May 17, 2026 by Swagatam 19 Comments

In this post I have explained two methods of connecting batteries in parallel. The first one below deals with changeover circuit using SPDT switches to charge multiple batteries individually or collectively. These may be connected in parallel using a single battery charger and through a manual SPDT changeover switch bank. The seconds design talks about […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charger, Circuits, Explained, Parallel

48V Solar Battery Charger Circuit with High/Low Cut-off

Last Updated on May 17, 2026 by Swagatam 225 Comments

48vsolarbatterychargercircuit

In this post I have explained a 48V solar battery charger circuit with high, low cut-off feature. The thresholds are adjustable through individual presets. The idea was requested by Mr. Deepak. Technical Specifications Hi Swagatam, Thank you for UPS relay circuit. I am trying to build it very soon. I will update you the result […]

Filed Under: Battery Charger Circuits, Solar Controller Circuits Tagged With: 48V, Battery, Charger, High, Solar

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

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

PWM Solar Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam 211 Comments

SMPSchargercircuit

This simple, enhanced, 5V zero drop PWM solar battery charger circuit can be used in conjunction with any solar panel for charging cellphones or cell phone batteries in multiple numbers quickly, basically the circuit is capable of charging any battery whether Li-ion or Lead acid which may be within the 5V range. Using TL494 for […]

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

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