Solar Powered USB Charger (phones, MP3 Players Etc)

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Introduction: Solar Powered USB Charger (phones, MP3 Players Etc)


This is my take on a already well documented little project. Very simple to make and a good introduction to electronics and solar powered stuff. Works just fine too. You need to generate 5-6V to charge a phone.
You will need:
Solar panels. I used 2 panels. (3V I think )
5V voltage regulator
USB female jack/connector
Insulated wire
Soldering Iron
Epoxy or hot glue

Step 1: Bits & Pieces

Gather together all your stuff. You need to make sure you know which side is top and which side is the bottom of the USB plug and the voltage regulator so that you solder the correct pins.

The regulator keeps the power output to 5v.

Step 2: A Series of Solar Panels

A USB port from a computer puts out 5.5V for charging of phones and mp3 players. So you need to get about 5-6V from your solar panels. In this case I need to solder the solar panels in series in order to double the voltage output. (3V each panel).  Solder the positive of 1 panel to the negative of the other. (Its just like putting 2 batteries in a flashlight)

Step 3: Solder It All Together

Hook it all up!
The positive wire from the solar panels goes to the LEFT pin of the regulator. (mine is upside down in the photo)
The negative wire from the panels goes to the MIDDLE pin of the regulator and is also connected to the RIGHT pin of the USB plug. (Again, mine is upside down in the photos)
Then connect the last pin of the regulator to the other outside pin of the USB connector.
The 2 middle pins are not needed.
If you follow my pictures it will be OK....

Step 4: Glue

I used hot glue to hold it all together but an epoxy or duct tape will work fine.

Next time I would make it so that the 2 panels hinged in some way so that it could fold together.

Step 5: It Works!

Here it is charging my HTC.
I have it under an incandescent bulb as it was dark outside when I finished....but it works!

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38 Comments

I bought a 5.5V solar panel from amazon with charging nodes for mobile. When i plug it in my phone it flashes the charging notification for a moment but doesn't show the charging indication thereafter and doesn't charge as well. What could be wrong? Please help...thanks in advance

Will this work for an iPod touch4th gen

No, you need a data connection on the USB to charge any apple device

can anyone tell me why my phone wont charge this is all i get (solar panel is 6V 1W)

can anyone tell me why my phone wont charge this is all i get (solar panel is 6V 1W)

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In theory all should be working...
Maybe LG like the evil Apple empire and the phone needs a data connection in order 'to know' its connected and will then beging charging??

what should the wattage on the solar panel be? (6v solar panel)
will a 0.5watt panel work?

Should work, but slow...

A guy on youtube said (and I agree) that if you want a fast charge that wont take all day get a 1.5w or higher.

I just got five 3.3 Watt 6 Volt Solar Panels for 20 bucks. Granted there not small and light like the ones listed but there great for starting and testing a DIY project before spending a lot on these nice little ones.

Thoughtful comments...cheers!