Battery full charge alarm circuit
The Battery full charge alarm circuit for a general battery charger. It is simplified circuit and cheap, use one transistor BC557 and display with 2 LED.
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October 12, 2018
Gel cell battery charger circuit
It can charge any size of the Gel cell batteries and extend the life of the Gel Cell battery. While the circuit is running, the LED indicates charging.
May 16, 2018
Make cheap 6V battery charger circuit from a mobile charger
Modify cheap mobile phone charger inside is simple DC switching regulator circuit and can apply many ways, such as DC power supply
November 17, 2017
Two Automatic battery charger circuits
This is Simple automatic battery charger circuit, using the small SCR and relay is cheap and can use all battery size by input source. [...]
July 30, 2017
Converts power supply to automatic battery charger using SCR-CA723
This is how to modify old Lead-acid battery charger or convert power supply to battery charger in automatic. To protect over charging by CA723 and power SCR
July 17, 2014
4 Lead acid battery charging circuit using LM317
Here are 4 lead acid battery charging circuit projects, for 6V battery or 12V automotive, it is easy to use, with automatic charger control circuit [...]
June 17, 2014
