Adding a solar panel to your smartphone

In this article we will look at how to make a solar cell phone charger. This device is easy to manufacture, has low weight and dimensions, but performs a very useful function. It will become an indispensable assistant when traveling, and your gadgets will always be charged. With its help you can power any device, be it a mobile phone, tablet, MP3 player or even a Power Bank. The speed of operation will depend on the size and power of the solar battery you will use during assembly. A pleasant feature will be the extremely low cost of parts.
Adding a solar panel to your smartphone

Will need


For production you will need:

Adding a solar panel to your smartphone

The only tools we need are a soldering iron, a knife or scissors.
I bought all the components on Ali Express. There are a lot of options to choose from; you can experiment with the size of the solar cells or choose a different connector if, for example, you have an iPhone.

Build process


Adding a solar panel to your smartphone

Solder the wires to the plus and minus on the battery.
Adding a solar panel to your smartphone

We solder another one in parallel to the negative one.Now the positive wire must be connected to the outer leg of the stabilizer, and the negative wire at the junction with the central one.
Adding a solar panel to your smartphone

We connect the free leg to the outermost contact of the USB port. We solder the remaining wire to the second side contact of the connector.
Adding a solar panel to your smartphone

Adding a solar panel to your smartphone

Before assembly, it is necessary to put heat shrink on the wires in advance.
Adding a solar panel to your smartphone

After soldering is completed, they need to be warmed up with a hairdryer or a simple lighter.
Adding a solar panel to your smartphone

Having tweezers and a magnifying glass on hand will make the work easier, since all the parts are small in size and have small distances between the contacts. This also applies to the size of the soldering iron tip - the smaller the better.
We insert the connector into the smartphone socket and place the battery in sunlight.
Adding a solar panel to your smartphone

Discharge is underway. The device is ready to use!
Now it would be a good idea to attach this charger to the back of the case or body of your cell phone or other device. This can be done using double-sided tape or hot glue. Using thin wires, route the power supply inside under the cover. For compactness, use a small-sized stabilizer chip housing 7805, then you can carefully install everything inside.
Now it will be impossible to forget the charger at home, and the charging process will become even easier. In cloudy weather it doesn't work as well as we would like, but it still works. But it’s worth noting that you will no longer be able to charge your device while on the beach or in the forest, especially for free.

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Comments (8)
  1. Nemo
    #1 Nemo Guests 4 May 2019 15:52
    5
    Let's start with the fact that this solar panel cannot provide an effective voltage at the input of the lm 7805. When directly illuminated by sunlight, it produces about 6 volts, while for the lm 7805 the effective voltage is 10 volts, the minimum (for normal stabilization 7.5 volts). The operating current supplied by such a battery is about 120-150 mA, which is also not enough to charge a modern smartphone. Yes, the phone will show charging, but in fact it will hardly charge. This problem is solved by adding at least three more panels connected in parallel and a Chinese converter with Ali.
    1. Oleg Gritsev
      #2 Oleg Gritsev Guests 31 August 2019 14:41
      1
      Absolutely right. It’s just better to use a battery with polycrystalline silicon and not like here with mono. And choose a pulse converter with high efficiency.
  2. Mikhail Alexandrovich
    #3 Mikhail Alexandrovich Guests 4 May 2019 17:19
    0
    They say that a rectifier is not needed since the batteries have a built-in power controller.
  3. Guest Dmitry
    #4 Guest Dmitry Guests 4 May 2019 19:26
    1
    I don’t understand why you need lm 7805 for such a solar panel? With a current like this socket, even if it charges, it will take the entire sunny day. And there’s no use for the stabilizer, just simply hook the panel straight and that’s it. I assure you, the battery will not explode, will not even warm up, and maybe even charge, by 25 percent
    1. Dmitry Spitsyn
      #5 Dmitry Spitsyn Guests 6 May 2019 16:46
      0
      No, it won't charge.It will discharge faster than it will charge.
  4. Guest 123
    #6 Guest 123 Guests 6 May 2019 13:18
    0
    why is this necessary? batteries don’t like heat and the panel gets hot
  5. Alexei
    #7 Alexei Guests 24 May 2019 19:47
    1
    You can install a pulse stabilizer, it will be much better
  6. Sanyok
    #8 Sanyok Guests 26 June 2019 22:21
    0
    It's high time the Chinese released such smartphones, otherwise they put a battery at 3000 and that's a joke!