Picture of Solar charger
In this step-by-step guide i'm about to teach you how to design and build a simple solar charger.

What you'll need:

1) Solar panel.
2) Adjustable Boost Converter Charger Module.
3) Electrical Wires.
4) USB female cable.
5) A box.
6) Recommended  - portable USB charger, a cord, led. 
7) Soldering Tin.
8) Duct tape.


1) Plier.
2) Soldering iron.
3) Hot glue gun.
4) A knife.
5) Tweezers.
6) Voltmeter.
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Step 1: Attaching wires to the panel

Picture of Attaching wires to the panel
Solder electrical wires to the solar panel (Red to +, black to -).
Cover it with the duct tape. 

Step 2: Adjusting

Picture of Adjusting
Connect a power source to the charger module and a voltmeter to the output of it. Now adjust the module to 5v output.
connect the panel to the module (to the input).

Step 3: Connecting USB

Picture of Connecting USB
Cut the USB cable and then solder the + cable to the + output in the module and the - cable to the - output. 

Step 4:

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Mark on the top of the box the size of the solar panel.
Cut near the borders that you've marked so the hole is a bit smaller than the panel.

Step 5:

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Use hot glue to glue the panel to the hole.
Now glue the other parts to the bottom of the box so they wont move, in the side make a hole as big as the USB cable.

* I recommend gluing the USB output well so sand and dirt wont come in.

**If you had cotton wool in the box i recommend putting it between the panel and the bottom it will also help preventing the parts moving.

Step 6: Finished!!

Picture of Finished!!
Now you can test your charger.
crashzoom (author)  ilyas.ouchane81 month ago
On ebay, deal extreme or arduino stores maybe
ragyarko made it!1 month ago
it.really good
gridarmorfix10 months ago
I would recommend using a dc to dc step up module eBay item number 321333677611 this will allow smartphone charging. because the solar panel is only a few hundred milliamps I would also recommend charging the phone in the off state as your phone may not charge at all if it's on. my phone pulls .94 amps while charging, that's 940 milliamps.
crashzoom (author)  gridarmorfix3 months ago
Tnx great advice
Mr_Rep8 months ago

so i have a 4 AA battery holder, and a 7.2V NiMh RC heli battery. which would be more feffective with the use of a 6V solar cell?

crashzoom (author)  Mr_Rep3 months ago
I believe that the 4AA holder cause it has the same voltage
97737769016 months ago
can i use 5.5 volts solar cell
crashzoom (author)  97737769013 months ago
of course you will only need to adjust the output to 5 volts
otmpp5 months ago
where can I get a solar panel in the UK anyone
crashzoom (author)  otmpp4 months ago
order one from eBay
SparkySolar6 months ago

Thank you for your Instructable

Nice job.


crashzoom (author)  SparkySolar4 months ago
thank you :-)
SparkySolar6 months ago

Thank you for your Instructable

Nice job.


edservice1 year ago

Could you please provide a part # and source for the solar panel

crashzoom (author)  edservice1 year ago
billbillt1 year ago

great project...well done...

crashzoom (author)  billbillt1 year ago

Tnx :)

Whats the name of that adjustable boost module? I have a dc-dc buck converter but it does not boost voltage.
crashzoom (author)  gravityisweak1 year ago

crashzoom (author)  crashzoom1 year ago

That's the one i bought

Great tutorial! Does it matter if you cover the wires with electrical tape or duct tape?

crashzoom (author)  Penolopy Bulnick1 year ago

Thanks :) i agree with nqtronix about the tape issue, i used it to prevent wires from touching each other.

As long as the tape is none conductive it should be fine in this aplication. When working with higher voltages however you should use proper isolation with either electrical tabe or heatshinking tube just to make sure you're out of danger.

Awesome! Thanks :)