Battery Pack For USB Devices

The project is designed to power a device via USB cable using two standard AA and some electronics to form a battery box.

The use of this USB battery pack provides the solution of having built-in batteries in gadgets due its advantages and disadvantages. It may have more power and capacity and could last longer but the device will be out of power when the batteries get empty. The specification of USB requires 5V from the 3V of input delivered by the batteries and converted through the electronics. It is very useful for any USB chargeable device.

An LT1073 DC/DC converter was used to maintain the correct output voltage of 5V. It had the functionality of two resistors by default but was removed later on. During the installation of the capacitors, the cathode and anode sides are determined by the dent which pertains to the positive pole. During connection, the metal of the tin should not be touching the contacts below the board. This is done by mounting the board on some pieces cut from a wine cork using 2 component epoxy glue. A Dremel cuts the hole for USB.

Rest of the project