9v USB charger

very easy USB 9 volt charger

Step 1 Parts list

L78M05CV  5V 500 Ma voltage regulator
9 volt battery snap
USB connector (female) ,or phone charger plug
switch
of course soldering iron and some solder.
optional - extra wire ,heat shrink ,recharge able 9v battery ,multimeter (for checking if all are working correctly.)
I bought 9v 250 Mah battery for 6$. I think if you build this you'll need recharge able battery. For wire i just use wire from 9v battery snap.

Comments

[ebaratita]

i think you need 3 capasitors for this one

[lorddavis6]

This is very basic charger.I tried to make it from as less parts as I could. Maybe you should make your own version of this ckarger

[fancysaukrel]

Hello,im just wondering if you know of any electronics that i can get a female usb connctor sorry im cheap and dont want to have to buy one
thanks,
Fancysaukrel

[lorddavis6]

You could get a female usb connector from a cheap usb extender cord

[lorddavis6]

You can get USB (normal kind) extender and cut it of.
You can buy USB female connector separetly from makershed or godaddy ,or some websites like that.
BTW Sorry for my bad english skills. :)

[lorddavis6]

sorry for so little image in 2nd step.

[martenp]

It is correct, the gnd comes form the batterys negative and goes to regulators centre, where its supposed to go, then it goes to the usbs negative :) everything is correct

[seben]

will this work for charging my psp 3001, and do i need a female usb from a old computer or does it half to be from a wire.

[dfalk]

Hi nice!

Can u link where I can buy L78M05CV 5V 500 Ma voltage regulator

[lorddavis6]

You can find it at radioshack or godaddy.com.I bought mine at local radio electronics store.

[dfalk]

Does it works to other phones?

[lorddavis6]

If they charge with usb , then yes.

[kushalverma]

if we supply 12v instead of 9v then will it work????
and
can we charge more than 2-3 mobile phones at a one time???????
plz rply

[lorddavis6]

12v will work fine. If you add more usb conectors (red with red and black with black wire) on output conections , then you could charge multiple devices at the same time.

[Vanila]

Will this word with the new Ipod Touch 4?

[Data643]

No, iPods & iPhones need a special circuit. I've tried this schematic and it did not work with my iPod Touch

You will need to make the circuit from here:

http://www.jameco.com/Jameco/PressRoom/altoids.html

It uses a few resistors to give voltage to the two middle pins

[TechyGeeky]

Thanks for the link! I'm going to go to the local electronics shop to buy the components now.

[lorddavis6]

thank you ! I Don,t own any apple product

[h3x_your_nightmare]

i've done this and it's working like a dream :D i've tried to charge a nokia 2600 classic with this and works just fine :) now i need to find a small box :) oh and...this thing is pretty cheap! if you search on web you can find emergency chargers for almost 40$ :P sorry for my english ;) greetings from Romania ;)

[lorddavis6]

thanx! :)

[DoctorOfAwesome]

How did you get the casing off of the female adapter?

[lorddavis6]

Easyest way will be to buy usb female conector withnout casing.you can tear it with pliers or some of them just pop of when you pull them. (Sorry for bad english)

[DoctorOfAwesome]

Hmmmmm...there want one at radio shack, wal mart or gregs......should i try frys?

[lorddavis6]

Can you try to spell it more right? I can.t understand .

[lorddavis6]

it came with it.
Sorry for my bad english.

[HarveyH44]

Your 9v battery won't last very long, 20-30 minutes. A boost converter and 2 AA batteries would last over an hour, commercially available for under $5... Still not bad for re-purpose stuff laying around. Don't really use portable devices enough to need additional power on the go, or own a cellphone, so not real sure how long it takes to charge them. 30 minutes seems a little short though.

[lorddavis6]

sorry for late answer but it realy won't last very long!

[kmagic4]

sorry but your circuit is wrong.... the way you have it drawn the gnd on the regulator is going to the posotive side of the battery and that doesnt make any sense...gnd should go to your usb and negative side of battery....the output should go to the other side of your usb and you in should go to the posotive side of your 9v.. and the switch can be thrown in anywhere.... correct me if im wrong but i usually am not..LOL!

[lorddavis6]

and thanx for correcting even ,if you are wrong ,but it is nice if someone helps!

[lorddavis6]

i"ve connected this charger exactly like it is showed schematic and in real life model too. it is working very well,but regulator may get hot! :( regulator is that side up what is showed in picture at (step 1).sorry if you can,t understand some words,i"m not from USA or UK.