Mini iPhone Charger.

hamzewassim

Hello guys I was surfing the web when I saw a tutorial about making an iPod charger it was an iPod touch 3G released within the iPhone 3GS, so I am willing to built one for my 3GS. It's pretty simple all you need is some wires, a 9V battery, a 9V battery clip. 5V regulator, a solder, soldering iron and a USB socket. So what do you think, is it legit?
Source

J4D

It would surely work. Although i don't recommend using the regular 9v battery, as a linear voltage regulator will eat through it quickly.

hamzewassim

J4D wroteIt would surely work. Although i don't recommend using the regular 9v battery, as a linear voltage regulator will eat through it quickly.

You're right I heard that a 7.2V rechargeable battery will fit the job.
And another thing, if you know how to build that thing post a reply because that guy( who made the tutorial) is very messy. Any help would be appreciated.

mesa177

The guy who posted the instructable is a bit messy, and yes using a 9V rechargeable battery is better to use than the regular one (the 7.2V rechargeable batteries are not common to find), but the design works.

hamzewassim

mesa177 wroteThe guy who posted the instructable is a bit messy, and yes using a 9V rechargeable battery is better to use than the regular one (the 7.2V rechargeable batteries are not common to find), but the design works.

Do you think the electronic map of the project is right?(will this work)

J4D

Here is how i would do it :

Eagle board file
Eagle schematic file

hamzewassim

J4D wroteHere is how i would do it :
http://innovo-lb.com/files/schem.PNG
http://innovo-lb.com/files/brd.PNG
Eagle board file
Eagle schematic file

Thanks J4D but can I do it without the resistors. I mean we transform the voltage to ~5V using the 7805 5V regulator then we drive the electrical energy to USB's pin1 and pin4.

J4D

these are capacitors not resistors. And yes, you have to use them to eliminate noise on the input and output terminals. If you dont the 7805 will malfunction .

hamzewassim

J4D wrotethese are capacitors not resistors. And yes, you have to use them to eliminate noise on the input and output terminals. If you dont the 7805 will malfunction .

Thanks man

mr-anderson

and you should always add a diode on the + node at the DC input to protect the circuit from reverse polarity