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)
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)
CIRCUIT DIAG
BEST AND EASIES WAY TO HAVE T REGULATED 5 VOLTS , IS TO USE A CHEAP 7805 VOLT REG
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.
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.
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.
Solder the devices , and then cut the excess solder board
Finally cut the other part of solder board , just by bending on the table sharp edge
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 .
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 .
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 .
you can keep this in a small box or on a wooden board to be safe .
I checked it with 18volts solar panel , and it is working fine , even in the dim light .
Solar panel is best variable voltage source to give to input and check the constant output voltage of the circuit.
Please note : you solar panel wattage given by manufacturer is in ideal condition , you can never achieve that ,so the current drawn from the panel will be much less in most of the time , so better to go for higher rating , so that you can get power even at low light..
Solar panel is best variable voltage source to give to input and check the constant output voltage of the circuit.
Please note : you solar panel wattage given by manufacturer is in ideal condition , you can never achieve that ,so the current drawn from the panel will be much less in most of the time , so better to go for higher rating , so that you can get power even at low light..