Simple USB Charger

note: you can't depends this charger Except in emergency cases because it may affect on the life span of the battery

Step 1: Component That You Need

1- 9v battary

2- battary Socket

3- 100nf capacitor (2)

4- 100mf capacitor

5- 74mf capacitor

6- resistor 470ohm

7- led

8- USB socket

9- regulator lm7805

10- switch

Step 2: The Circuit

you can build your circuit online at this site

www.circuitlab.com

Step 3: The Final Result

After connecting the circuit it will be like that and it will be ready to charge your mobile

Step 4: My Mobile Connected to the Charger

Comments

[Keerthan ks]

Nice work bro

[vickydragon]

how many hours does this circuit take to charge :)

[Gomi no Sensei]

Most smart phone batteries are 1500-3300mah.

A 9V battery has 50-400mah and at 500mw load has less than 300mah capacity.

You're also losing 30% of that 300mah thru the 7805 as heat.

Just exactly HOW much does this remaining 210mah charge your phone ???

Ref : http://www.powerstream.com/9V-Alkaline-tests.htm

[Dylan91]

cool project nice tutorial:)

[MohamedM10]

thanks :D

[the Dark One]

how many mAh can deliver with a9V battery?

[MohamedM10]

9v battery gives about 400 to 500 mA per hour

[tomatoskins]

Such a cool design. What do c3 and c6 do?

[MohamedM10]

to Slow the charging process as much as possible