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Portable USB Charger (Version 2.0)

Step 6Adding the switch

Add a switch to this circuit is very simple, it'll save a lot of battery when you turn it off than just leaving it on idle. You can attach the switch anywhere BEFORE the capacitor (if you did not use a capacitor, then before the 7805).

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10 comments

Apr 17, 2012. 3:42 AMahmedebrahim says:

I have a question for edwarapricopai or for all of u who read this comment; How can I get 54 volts from this circuit? please send me ur response through my email address maehmedebrahim@gmail.com.
Thank You.

Apr 17, 2012. 7:34 AMnodoubtman says:

54 v to charge a 5v device?

Apr 17, 2012. 7:25 AMXOIIO says:

You can't, duh.

Dec 3, 2011. 8:37 PMkinclong2 says:

In your PCB, the middle pin of 7805 is the OUTPUT. That is WRONG. The correct one is that the middle is GROUND. You have a correct schematic diagram but WRONG PCB.

May 3, 2011. 12:40 PMrohin1204 says:

oh and sorry does this work with a blackberry

May 3, 2011. 12:39 PMrohin1204 says:

just checking on the regulator which i'm guessing the one on +V is 'in', 0V is 'out' and the middle is 'reference' pins? Also, how do you attach to the USB, solder? ty

Jun 16, 2010. 5:09 AMthpe says:

With the regulator correctly wired, I do get a voltage output of 5v, but my iPad won't charge. I've tried to bridge the data lines with a 15kohm resistor and even without a resistor. Please help me out on this one!

Oct 29, 2010. 5:15 PMAdam Manick says:

use this circuit

http://www.instructables.com/id/How-to-get-your-iPod-to-charge-with-your-homemade-/#step1

Jul 7, 2010. 3:17 AM

mischka says:

Please update the image in order to fix the bug.

Jun 13, 2010. 6:43 PMkeitheric5 says:

on the 7805 pcb pin out youi have the output and ground incorrect pin 2 needs to go to ground and pin 3 is the output.

Oct 2, 2009. 6:35 PMdash24 says:

dude_{in this diagram... after we put the voltage regulator} is it the same that the positive and negative charge in the source are also the same after the volt regulator? reply asap...tnx.

Dec 17, 2009. 7:37 PMedwardapricopoai says:

yes it is important because you may get up to 54 volts if you wire the 5 volt regulator wrong

Dec 18, 2009. 5:33 AMedwardapricopoai says:

also i may have not understand ed you to good so be more grammatically correct and have more details