How to make a USB battery charger

Today, a large percentage of people have a personal computer at home. Today we bring you a very interesting article with which you can take advantage of the hours you spend in front of the screen to recharge your batteries..

USB battery charger.

First of all, it is important to note that this invention will only be used for the following purposes AA rechargeable batteries. Normal batteries cannot be recharged.

The electronic components we will need to assemble our circuit are as follows:

- A TIP32C integrated circuit.

- Six resistors:

o R1 = 56k

o R2 = 27k

o R3 = 22k

o R4 = 47k

o R5 = 750

o R6 = 220

- LED diode.

- 0.1 µF ceramic capacitor.

- An LM393 integrated circuit.

- A battery holder.

- Printed circuit board.

Well, after getting all the necessary elements to carry out the assembly, we will proceed to assemble them all. The first and most important thing is to make the circuit that will allow it to work. In this article you can see how to assemble a printed circuit board on a plate. The schematic diagrams for the implementation are as follows:

Printed circuit board of the USB battery charger.

Circuit sketch

USB battery charger board.

Location of components

Battery charger plate.


Once we have the circuit ready, all that remains is to incorporate the battery holder and the USB cable. In the following image you can see where each cable will be placed:

Markings on the battery charger plate.

After making these last changes, we will get a result like the following:

Finished USB battery charger.

As you can see, the assembly is quite simple and we won't spend more than 5 euros to buy the components. If you have any doubts, you can go to the forum and we will solve them without any problem.

9 thoughts on “Cómo hacer un cargador de pilas USB”

  1. hola. i would like to know if it is suitable for AAA batteries (rechargeable obviously), can i charge one battery at a time if i send the batteries directly to one? and then how do i connect the power cables to the usb cable. do you have the wiring diagram to provide me with? thanks very much.
    I would appreciate if you could write to my email because I found this forum by chance.

  2. I have a few questions:
    How do I attach the battery holder to the board?
    Where do the positive and negative of the battery holder come from?

  3. Very good idea
    How much power is delivered through the USB output of the computer? Can a portable mobile phone charger with USB output be used to connect this device?


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