For the cell phone to charge, charger output must be above 4V and can deliver a maximum current of 500mA. This charger circuit will step up the voltage from 1.5V to 5V DC to reach the cell phone ...
Wanna recharge your portable music player through its USB power interface, during a winter trip? Or like to energise a microcontroller based circuit using a single penlight cell? Here is an ...
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