Instructables
Picture of DIY SOLAR USB/5 V SUPPLY
This is a simple project to get a power supply or charger for most of the usb devices or cell phones .

I used a 18 volts solar panel , though many people here will recomend you to use 9 volts solar panel
Advantage of 18volts panel is that you will get the voltage and required charging current even in the dim light ,(if you use smaller voltage panels , though you get voltage , the current may be too less)


 
Remove these adsRemove these ads by Signing Up

Step 1: CIRCUIT DIAG

Picture of CIRCUIT DIAG
BEST AND EASIES WAY TO HAVE T REGULATED 5 VOLTS , IS TO USE A CHEAP 7805 VOLT REG 

Step 2:

Picture of
things required are
1. 7805 ic------------1    cost about 0.4 usd
2. 10mf cap --------2    
3. soldering iron and plain solder board  ,cost about 3 usd
 
If you like to add a LED , then one led and 3k ohm resistor 1/4w. 
Please take care of the polarity , ie , positive of capacitor connected to + of supply .same for LED too.

Step 3:

Picture of
Mount the devices on the solder board , so that you can adjust and re position the devices for proper gap and soldering as per circuit.

Step 4:

Picture of
Solder the devices , and then cut the excess solder board

Step 5:

Picture of
Finally cut the other part of solder board , just by bending on the table sharp edge

Step 6:

Picture of
Bottom of the soldered circuit will look some thing like this ,
Note , i made a small loop so that i can hook the wire to it , so that i need not have to solder and de solder again.
Hook I made from LED wire , which is very strong , and easy to solder . 

Step 7:

Picture of
Now your circuit is ready and will look similar to this ,
you can keep this in a small box or on a wooden board  to be safe .
Errol19511 month ago

Hi

I am interested in building this do you mean 10uf or 10mf or are they interchangeable

BLR_RAVI (author)  Errol19511 month ago
its 10micro...electrolytic cap ..35volts...even higher cap like 100micro will be ok
Igor227 months ago

I have a 7805CT,can i use it for this project?

BLR_RAVI (author)  Igor227 months ago
YES , any ic with 78xx can be used