Portable USB Charger (Version 2.0)

The project name says it all. It is a device that will charge things like Ipods, PDAs, other other devices that plugs into a USB to charge.

Step 1 Supplies

The parts needed for this project are all in the second picture.

You will require:

LM or MC 7805 +5VDC Voltage Regulator
Type-A Female USB Port
100 UF Electrolytic Capacitor 10-50v
0.1-0.5 UF Capacitor  6-50v (any type would do)
150-160 ohm Resistor (optional)
9V Battery clip
2.2V 20mA LED color of your choice (optional)
Unprinted circuit board
ON/OFF Switch (optional)

These parts can be easily purchased at your local electronic store, like Radio Shack. Or you can buy them online at:
http://www.digikey.com

Regulator:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=LM7805CT-ND

USB port:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=151-1080-ND

100 uF Capacitor:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=P12392-ND

0.1 uF Capacitor:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=399-4151-ND

Comments

[suyy10]

using 7805 is simple. however, it's inefficient.

[tdobbins1]

In a project like this one. They said to connect the 2 data pins on the usb so it can trick the phone to charge. Do you know any thing about if that is true or what will happen if you connect them?

[iApple guy]

Most iPods, iPads, and iPhones will need this connection in order to charge. If you do not do this to your iDevice it will not charge. And to answer your Queshton that is true.

[nodoubtman]

is there a schematic working for a ipod touch 4G ?

thank you!
marC:)

[RaverGames]

This should work on the ipod touch 4G both use a 5V Usb cable.

[nodoubtman]

Sorry, it doesnt work for the ipod touch.. i have tried it... i don't know ... do you have an mp3 player then?

thank you!

[Yourkii]

The iPod Touch 4G use the 4 USB Pins to charge.

[jeffrey_om]

http://www.simple-electronics.com/2011/09/iphone-charger-circuit.html

I do not know if this circuit is working.

[ahmedebrahim]

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 [e-mail].
Thank You.

[nodoubtman]

54 v to charge a 5v device?

[XOIIO]

You can't, duh.

[davelectronic]

You need a heat sink to your 7805 regulator, add one silicone diode to ground to push the voltage up 0.5 volts or so, your design will drop below 5 volts.

Alternatively do away with the whole thing, use a 4 x AA battery holder for alkaline cells = 6 volts, forward bios i silicone diode to reduce to approx 5.2 volts and a lot more current, a 9 volts only about 70mA .

[freedom25]

sir can ask something regarding an output of 4.5 volts from a lm7805? how can i reduce it from 5volts to 4.5volts? the input is a 9volt battery, can i ask what modification can i do? i'm new in this electronic devices, can u send me some circuit diagram, thanks sir, here's my email [e-mail]

[GoodAtIt]

You cannot get an output for 4.5v from the LM7805. You can add a diode on the output to drop the voltage a little, but that depends on the diode you use.

You can also use the LM317 to obtain a regulated output of 4.5v.

[Zakkron]

what size PCB board should you use to make it as small and compact as possible?

[GoodAtIt]

You can design the PCB as small as you like, as long as you can fit all the components on it.

[Zakkron]

thanks

[Zakkron]

What size PBC board should you use to make it as small and compact as possible?

[kinclong2]

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.

[bbeyzat]

where to find the board or what else we can do

[m1s73r]

I think you should add a heatsink to your "shopping list". The Voltage Regulator gets really hot, even if you insert it right.

[ik110]

Hi,
Iam very much interested in making the charger but iam a totally novice when it comes to PCB and itching and cutting them nor I have any knowledge of caps or resistors... can any one load video of the entire process please >>>>

[m1s73r]

So, first of all I think making this charger isn't a good idea for you, because this is a little bit harder as maybe other Projects. You should start with something easier, with less electric parts.

The PCB isn't really necessary because you can also use a breadboard or something. I use a perfboard and it works great.

Caps (capacitors) can store energy for a time, such as your computer does.
Resistors are like a dam, they stop the energy or convert it to heat.

I hope I could help you a little

[idsonic]

pls can i get every thing about this project? including the write up

[idsonic]

pls can i get every thing about this project? including the write up

[gemimile]

it would be very helpful if you post different views of the pcb design, like copper plate view, components side view, just to prevent people from confusions

[abains]

project is failiure as im getting low current at output about 250ma not enough for charging even a low powered device

[idsonic]

i'm a computer hardware studentent, i want to write my project, and i'l b glad if any1 can help me with a complete project on either a usb charger or usb battery charger, or any kind of project u tink it'l b better 4 me to construct lyk: usb speaker, usb slpitter, usb hub , any tin. or getting the full details on this 1 usb charger.

[markee2]

Thnx for the project, really nice and easy to construct!!
i have seen also same schematic as yours.


http://www.simple-electronics.com/2011/08/usb-charger-circuit.html

[mathdroid]

thank you for this great instructable. i have a little question, by the way. is there a way to amplify the output current? cause it doesn't seem to be able to charge my phone.

[GoodAtIt]

These regulators are only rated up to 1A current. You need to check the voltage of the output while you have the phone plugged in. If its close to 5v, then you need to modify the data lines using resistors. If its way below 5v, then consider a alternate design using a more powerful battery and a regulator.

[Crazy Electrum]

First time with something like this. But would this work? Or no. Idk much about electronic circuits.

[dawsonj]

hey thanks for this, I made one and I also came up with a better idea:

[Euticus]

Some regulators REQUIRE a cap on the output to guarantee stability. Check the datasheet.

[dawsonj]

then this wiring diagram would REQUIRE you to buy a stability guaranteed regulator ; )

[snowluck2345]

not gonna work, 6 volts is too low for a 5 volt regulator, epsicialy once the batteries get down to 4 volts

[dawsonj]

errr...
that picture was supposed to have a 9 volt battery but I must have messed up somehow. oh well!

[emaylas]

cani change the battery x4 aa bateries to 9volts batt ?

[dawsonj]

yes. it doesn't really matter, but if you want to use the battery's full "energy", this is not a very good way to make one. the 5 volt regulator just wastes the other 4 volts as heat, so its as if you were charging something that was 9 volts instead of 5.
its really good for a quick charge, though, but be sure not to leave the battery in when you aren't using it.

[emaylas]

it works ?? ...