This is a simple to build charger for single 3.7v lipo battery. the heart of the charger is tl431 shunt regulator that controls the incoming current. charger comes with a convenient charging led indicator.. Battery voltage versus time. the cells are full when the voltage peaks, and the charger shuts off shortly thereafter.. Around a year ago i began to work with operational amplifiers, and i decided to design a proper li-ion battery charger to learn to use them. i've learnt a lot about op-amps along the way designing this circuit and i wanted to share it, so people can make their own chargers instead of buying them..
This is a project of a mini usb car charger circuit. the circuit can charge usb devices with car battery.... Automatic battery charger automatically starts the charging procedure when battery voltage drops below a certain predefined value and stops after the voltage has risen above the maximum allowed value.. This is a simple to build charger for single 3.7v lipo battery. the heart of the charger is tl431 shunt regulator that controls the incoming current..
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