battery charger

This is circuit Automatic Charger and Full charged indicator. For 24V batteries it can charger with current be stable about 1.5A and have voltage output 27Volt with integrated number circuit LM317K. When the battery has had full already , as a result will cut the work. There is a tube LED show [...]

This is a MAX1811 based USB charger that can handle both Lithium Ion and Lithium Polymer 3.7V battery. It requires very few external components and provides ability to select between 4.1v and 4.2v battery regulation for different types of LiPo batteries. You can select between either 100mA and 500mA current charging mode and LED provides [...]

With this tiny thing you can charge almost all devices that are charged via USB, like iPods or mobile phones, with only two AA-Cells!
The reason is quite simple: I am bored of empty batteries (Ipod, mobile phone) while I’am on the go. And the solution with the linear regulator like the “7805″ is in fact [...]