This battery charger circuit differs from the norm in a number of ways, all of which make it difficult to understand. For this reason, I do not recommend it for the beginner. Repairing /revamping a ...

Now the battery charger is set and ready to go. Read a commentary on this article by Anoop Hegde: If You Build A Smart Battery Charger Using a Single-Transistor Circuit, Beware the Consequences.

This 24V to 36V linear battery charger is long overdue. While this is an old circuit technique, it is optimized for charging higher voltage lead-acid battery packs, and could be used on other types of ...

The following automatic battery-charger design is created with a circuit that could qualify as the simplest window comparator ever built around a single transistor.