usb car charger adapter circuit design

Posted on Feb 6, 2014

This USB car charger adapter project is a DC DC power converter that safely converts the 12V car battery voltage into stable 5V. This USB car charger circuit can be used to supply power from a car cigar lighter socket to a portable device that require a 5 volts. This circuit makes it possible to power/recharge any USB power-operated device, using

usb car charger adapter circuit design
Click here to download the full size of the above Circuit.

in-dash board cigar lighter socket of your car. The DC supply available from the cigar lighter socket is fed to an adjustable, three-pin regulator LM317L (IC1). R1 and R2 resistors regulate the output of IC1 to steady 5V, which is available at the A` type female USB socket. Red LED1 indicates the output status and zener diode ZD1 acts as a protector against high voltage.

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