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. juan charnock

    hello, and if instead of submitting it to a usb I feed it with a 12V solar panel, would it work?

  2. Hello friends, I have a few things to recommend to you.
    It's the first time I've been to this blog, page or whatever you want to call it but it's a shame to have to tell you that this circuit as it stands is a fraud.
    Where the battery holder appears to be attached is actually a 10K ohm thermistor at 25°C, it is a small resistor that varies with temperature. I have tested the whole circuit and it works, as it is what you are going to do is damage your batteries because the excessive current will eventually overheat the batteries and destroy them. The purpose of the thermistor is to cut off the charging current when the batteries reach 33 or 35°C temperature. So, my friends, I recommend you to look up the original article.

  3. I love it is just what I'm looking for. I congratulate you I would like to send it to me via email. If you can

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