5V 3A USB Charger

Ok, it’s my first attend to make an usb charger. The original idea was to have more than 1A at 5V. One limitation is the DC-DC buck converter, which can’t handle more than 3A.

Here is the schematic:

The bill of materials:

  • 1x DC jack barrel
  • 1x DC-DC buck converter (http://cgi.ebay.com/itm/200957000302)
  • 1x Red LED
  • 1x Green LED
  • 1x 560 ohms resistor
  • 1X 150 ohms resistor
  • 3x Female USB plug


Next step, testing in real :)

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