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Newly Updated Circuit Projects:

Convert SMPS into a Solar Charger

Last Updated on May 17, 2026 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

Charging a Cellphone battery with a Laptop Battery

Last Updated on May 17, 2026 by Swagatam 5 Comments

cellphonechargerfromlaotpbatt 1

The post presents a simple circuit that may be used for charging a cellphone battery with a laptop battery. The idea was requested by Mr. Gyashuddin. Recharging Cellphone Battery with Laptop Battery hello sir my self md gyashuddin I want to know that it is passible to built a circuit which can ,recharge my cell […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Cellphone, Charging, Laptop

Battery Health Checker Circuit for Testing Battery Condition and Backup

Last Updated on May 17, 2026 by Swagatam 16 Comments

battery2Bchecker

In this article I have explained a simple battery health checker circuit which uses ordinary components for enabling the user to get an instant reading of the battery efficiency or regarding its effective discharge rate. The idea was requested by Mr. Shrishail. Circuit Objectives and Requirements Nowadays i confirm the battery depicted below. First the […]

Filed Under: Battery Charger Circuits Tagged With: Backup, Battery, Checker, Condition, Health, Testing

Self Optimizing Solar Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam 261 Comments

solarmpptchargercircuit

In this post I have explained a simple IC 555 based self optimizing solar battery charger circuit with buck converter circuit that automatically sets and adjusts the charging voltage in response to the fading sunlight conditions, and tries to maintain an optimal charging power for the battery, regardless of the sun ray intensities. Using a […]

Filed Under: Battery Charger Circuits, Solar Controller Circuits Tagged With: Battery, Charger, Optimizing, Self, Solar

5 Simple Power Bank Circuits for Mobile Phones

Last Updated on May 17, 2026 by Swagatam 174 Comments

powerbank

In this article I have explained a 5 assorted power bank circuits using 1.5V cell and 3.7V Li-ion cell which can be built by any individual for their personal emergency cellphone charging functionality. The idea was requested by Mr. Irfan What is a Power Bank Power bank is a battery pack which is used to […]

Filed Under: Battery Charger Circuits Tagged With: Bank, Circuits, Mobile, Phones, Power, Simple

Lithium Polymer (Lipo) Battery Charger Circuit

Last Updated on May 17, 2026 by Swagatam 73 Comments

24vbatterychargercircuit

In this post I have explained a simple lithium polymer (Lipo )battery with over charge cut off feature. The idea was requested by Mr. Arun Prashan. Charging  a Single Lipo Cell with CC and CV I came across your work on “​Bicycle Dynamo Battery Charger Circuit” in Homemade circuit design blog. It was really informative. I […]

Filed Under: Battery Charger Circuits Tagged With: Battery, Charger, Lipo, Lithium, Polymer

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