Instructables

Make a USB iPhone iPod Charger On The Cheap!

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Picture of Make a USB iPhone iPod Charger On The Cheap!
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There are many designs for iPhone chargers out there and many are confusing or use parts that are hard to find.  My design uses parts that are easy to find, is tested works with all iPhones and iPods (as of this posting), and just works.  It is a fun and useful project.  I made one a few years ago and put a video on YouTube.  I weekly get many questions about making one.  So here you go and i hope you enjoy it.

 
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Step 1: Parts List:

Picture of Parts List:
Parts:
  • 1 - SPST Switch (I used a toggle switch)
  • 1 - LED for "ON" indicator red or green (Radio Shack sells LED's with resistor "350 ohm" you can mount.  That's what I used.)
  • 1 - 350 ohm Resistor
  • 1 - 7805 Voltage Regulator
  • 1 - 22uF Capacitor
  • 1 - 10nF Capacitor (code 103)
  • 2 - 33K Resistors
  • 2 - 22K Resistors (Other values can be used, read step 2)
  • 1 - Female USB Connector (I got mine at a dollar store)
  • 1 - 9v Connector
  • 1 - 9v Battery
  • Electrical Tape
  • Solder
  • Soldering Iron
  • Small piece of perfboard
  • Altoids Tin
  • Dremel Tool with cutting attachment or tin snips to cut the tin
  • Drill for switch and LED hole
  • Hot Glue
  • Paint if you want

You can go here for a good tutorial on soldering. 
For most of the parts you can use techno scrap and recycle old broken electronics or just buy them.
I wanted to use parts that are easy to find and inexpensive so everything can be bought at Radio Shack or if your don't mind on-line shopping I like http://www.taydaelectronics.com/servlet/StoreFront because it's cheep!  
I hope you enjoy the project.  

Warning: Just a fair warning that there is a small chance that something can go wrong and you can end up frying your really expensive iPod.  Be careful.  

dbaham made it!6 days ago

First project in a long time, I probably should have spent more time on the board layout, but it all fit.

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jknight2029 days ago

This is a great instructable but the use of a 9v battery means that you get very little juice out of it. I'm rather a novice at this stuff, what would I need to change to replace the 9v battery with, lets say, 4 AA batteries?

Thanks again for the fun project.

Well, I have been extensively researching to find a 6v to 5v voltage regulator... And apparently, to my surprise, there are none. So, you can do what I'm doing and use 4 AAs and 1 AAA in an altoids tin with a LM1117 voltage regulator. But if you're trying to charge an apple device you'll need to put a variable potentiometer between USB pin 2, and 3, then adjust it until the ipod accepts the charge.

elee076321 days ago

Was I the only one that couldn't get this to work? I built it just like the instructions said, and the light lit up, but the device I wanted to charge (4th gen iPod) didn't charge. This is my first project, could that be why?

never mind, I figured out why it didn't work. Radio shack guy gave me a 10 uf capacitor instead of a 10 nf one.

bjones901 month ago

Hi Matt

I really like the article and the design of your charger;
you have a retro/modern thing going that works well. It’s great to see people
still willing to hack stuff together for even modern devices and risk frying
their iPod. I write occasionally for <a href=”http://ipadrepaironly.com”>iPad
Repair</a>, I’m assuming this wouldn’t be enough to charge an iPad, what
changes would you need to make to make it suitable for iPad charging?

Best wishes

Brian

stevenarango2 months ago

looks very nice. i made one like yours mine gives 5v on the out put

but the battery overheats like mad.... any ideas why have you come across this problem? my usb charger is on my page.... cheers.

The 7805 in this design is capable of 1A so you could draw 1A plus losses from the 9V battery which is not recommended and would explain the hot battery. Make sure that the resistors that you use on the USB data lines limit the charging current to 500mA or less.

anothertaylor2 months ago

I didn't see an answer to the 350 ohm resistor questions. The 350 ohm resistor is a current limiting resistor for the LED. The larger the resistor value the dimmer the LED but less power will be wasted lighting the LED. The opposite is also true, the smaller the resistor the brighter the LED but more power is wasted lighting the LED.

Care must be taken to make sure the forward current through the LED does not exceed the maximum forward current or the LED will not last long. The actual current can be determined from 9V minus forward voltage on the LED (from datasheet) divided by the resistor value.

squall9874 months ago
could you not just short the data pinouts for dedicated charging mode?
hibbly5 months ago
Where did you get the 350 ohm resistor? I'm trying to impress a girl in my Calculus BC class, help me man.
usbmod hibbly4 months ago
u can use any resistors, if u have 2 175 resistors or a 300 ohm and a 50, they add up. so u can splice them together to make 350
komistar hibbly5 months ago
WE USED 360 INSTEAD OF 350 AS WE COULD NOT FIND THE 350 RESISTOR AS WELL.
ngibbs24 months ago
How much is CHEAP? what's the total cost of this product?
jhosborn4 months ago
I am trying to build this charger and the instructions call for a 350 ohm resistor but the closest I can find is 330 will it still work, or will it destroy my brothers phone
alexdrew58585 months ago
just a painting tip, when painting metal like this I find it easier and cheaper (not by much because spray paints cheap) to use somethinglike nail polish where I live a thrift store sells bottles 25cents each so its how I get cheat "paint".
komistar5 months ago
i have made this usb charger and have plugged it into a Sony Ericsson xperia play and it just turned off. i was making this for a ipad mini but wanted to try it on something else just in case. i don't know what is wrong, could it be just that the data wires aren't for this type of phone and only apple devices
divxpa9 months ago
Could someone hel me? I will do this project but i don't know what capacitor to use. It sais we need one of 22uf, but with what voltaje?
I know a very little of electronic, and i don't know what happend if I use a 22uf/25v or 22uf/50v or other voltaje. Please help!
kris754a divxpa6 months ago
as long as the voltage rating on the capacitor is higher than the voltage you are using, it should be fine :-)
ghasmann6 months ago
what is the voltage of the capacitors?
Devgan6 months ago
hi
I have 5v 800 mah charger. what things are required to make a charger for my iphone.
means what types of resistors and other parts to make iphone charger....can I also get output of 5v and 2v simultaneously from this 5v 800 mah charger
Facsi347 months ago
Thanks for this great instructable. I made it,but finally it only loads my phone (nokia x3-02) my tablet (samsung galaxy tab 2) and many other usb devices, but it doesn't work with my ipod. And it loads the other devices(phone, Tablet,mp4,mp3,another phone) only with one battery (used one Zink-Carbon), i bought a new one (alkaline), it doesn't load any device, and i found at home a battery pack for an rc car (9,6V Ni-Cd) it neither loads any devic. So my questions are: 1. Why doesn't it work with my Ipod? 2 Why doesn't it work with the rc car battery and with the brand new Battery?

Thanks in Advance
yaly7 months ago
This circuit WILL work with ALL iPhone/iPod models (even lightning cable devices) (unless apple does something stupid), if you plan to use it with an iPad use at least 3-4 9v alkaline batteries (Li-ion/Li-po is preferred over any other technologies) in parallel, no the led is just to indicate the battery has enough power to charge a device IOW it is optional you don't need the 350 ohm resistor if you are not adding the led. For EET1982 a power supply does not output current, the load draws the required amount of currents, your S4 charger says 5V-2A, this means it will output 5V and up to 2 amperes can be drawn by a load from it, more than 2 amperes will destroy it or a fuse will protect it if you are lucky. For the capacitors use at least 10V capacitors to be safe, do not join the two middle pins of the usb connector together to the point between the resistors, the configuration in the schematic separates them while giving each 2V. I hope this answers all of your questions, thank you.
eddevine8 months ago
Have an iPhone 5, works grate until it reaches 59% then charger isn't recognized can this be corrected?
ksstms8 months ago
1) You won't need the led and the resistor next to it.
2) 2 AA batteries=3V and that's not enough. You need 5V for the usb port, and even more (>7V) for the voltage regulator
syedj948 months ago
2 questions:
1) If I don't use the led, which parts will I not need?
2) If I would like to use 2 AA batteries instead, what would I need?
craig2707918 months ago
i built this, have you found with the circuit during charge large amounts of current are drawn and lost as heat on the 7805 regulator, this circuit drains a normal PP3 9V fast and a lithium ion 9V battery slower but still at a fast rate, this circuit is pulling around 500mA and a 9V battery can not sustain this>
Same question as below. Does this work with the iPhone 5?
mempie10 months ago
I am getting the 5V to the USB but instead of 2V i am getting 4V on the middle leads.

Any Ideas on what went wrong?
i Wired/Soldered it correctly, maybe i got a wrong part by accident?
EET198211 months ago
My wall charger for my Galaxy S4 is 5v and 2A. How many amps does this charger put out? I would think it would take forever to charge the phone. Thank you in advance for anyone that reads and /or comments. Thank you for the cool instructable!!!
martinw2211 months ago
What type of wires did you use
Sorry do the dumb question I just started with electronics and thought this would be a cool project to start
mayenliu1 year ago
help! what kind of 22uf should I use? Also is it okay if the green and white data line share one strand of wire.That..they're inbetween the 33k and 22k resistors?
mjdline1 year ago
you mean 10nF capacitor. 10 nano Farad is the same as .01micro farad. Radioshack part number 272-1051.
donh4641 year ago
im trying to find all the parts for this project. I cant seem to find the 10nF resistor anywhere. Any help appreciated...
rafian1 year ago
hello, I just realize one model identical to yours, I have a output voltage 5.06 02.06 data but my iphone does not load. Help me to find the problem, other brand iphone loads.
Sorry, but to clarify: so this circuit would work without the led and 350 ohm? Like if i just unplugged it to save battery?
USBguy1 year ago
Where can i get a bunch of the usb connectors ???
I have looked on line and not found much..........................................
ralicia1 year ago
can you make a video of you making it? It is hard for me to follow the steps you put .
-Thanks
maxchu7651 year ago
will this work on the iphone 3 or 3gs?
does anyone know if this specific design is fully compatible with the new iphone 5? if so please respond, it would be very appreciated
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