Recharging backup battery for 5V circuits
Looking for a way to power your circuits even when the main power goes down? This circuit shows how I implemented a backup battery in my home security system.
Be careful with batteries! They contain chemical stuff and not all battery types like to be charged by this system. In any case, don't use this circuit as a casual battery charger, because it is not meant for that. You'd be better off buying one.
Downloads
- Circuit with partlist and explanation of how it works