Step 10: [Construction: Make it Ready For The iPod]

Caffeinomane (http://www.instructables.com/member/Caffeinomane/) made a great instructable (http://www.instructables.com/id/Modify-a-cheap-USB-charger-to-feed-an-iPod-iPhone/) telling about how to charge apple devices such as ipod or the famous iphone. When I asked him to include the information here, he send me the following link where he got his information: http://www.ladyada.net/make/mintyboost/icharge.html

The solution is for the mysteries problem of non-charching devices is...
Sending exact voltages through the datalines. To get those 2 voltage dividers made of two resistors each are used. There are two ways to charge:
  1. with full current (1000mA): 2.8 V on D- and 2.0 V on D+
  2. with half current (500mA): 2.0 V on D- and 2.0 V on D+

Before you start to solder, try out the adapter with other devices to make sure everything works fine.

Because the space is very limited, you should try to get the smalest parts as possible; betwenn + and D- and D+ and - you could even solder a tiny SMD resistor. The values you need are shown in the pictures above. When you go an measure in the next step mind that you connected + and - with resistores (that means different results).

I've never tried this so I can't say if it works!
Can I charge an ordinary phone with this?
As you should know usb is rated at 5V. If your phone has an equal charging voltage (read the output voltage on your p hone charger) or can be charged with an usb cable it works. However if your phone is not charged with usb, you'll need to solder yourself an adapter cable. If so take a photo and ill give detailed information later. <br>If it hasn't 5v it will be a lot more complex, still i'll jelp you if so.
So where exactly does the power come from?
The power comes from the usb plug (max. 500mA) or from an external power supply (1000-2000mA). In any case you'll need 5v power source. This can be from a batterie as well.
Hi! Can you please explain the power socket? In what devices can I get one? How does it produce power?
The power socket does not produce any power. Its just a connection to connect the power supply. English is not my native language, I used google translater for some words, I would recomment to do this too. In case you answer prepare to wait a week or two cause I'm on vacation and usually I havn't internet access.
Boy, unregulated DC into an expensive device, absolutely brilliant.
<strong>Hey it's regulated. Realy. Read before you post bullshit.</strong><br> <br><br> <br><br> <br><br> <br>... I spend hours making this (If you are not a nativ English speaker everything takes more time to write) and i always tried to explain it as detailed as possibe. I have no problem if you don't understand what i mean, you can always ask if you're interessed. But if you spend just a few seconds on reading this you shouldn't write a &quot;criticism&quot;. That's why I'm pissed.<br> <br><br> <br>Please read the following as well:<br> <br><strong>We have a &quot;be nice&quot; comment policy. Please be positive and constructive with your comments or risk being banned from our site. </strong>
Well somebody seems to be on their period, why not read that yourself before overreacting. <br> <br>And by the way, considering there is no VOLTAGE REGULATOR in your circuit/schematic, it is not regulated, wall adapters or whatever power supply you use can get power surges, so maybe look your own instructable through.
I wrote:<br> <br><br> <br><strong>Make sure it's voltage is 5V (min. 4,65V - max. 5,25V) on every load. To measure on differnt loads you can put a resistor between + and - ; eg. for a load of 1A you need a 5V /1A= 5Ohm .</strong><br> <br><br> <br>In Germany we have a very accurate power supply system (I guess you know what I mean), but I know some contries haven't these benefits.<br> <br>An extra VOLTAGE REGULATER such as the 7805 would cause a loss loss of at least 2 V and only can handle currents up to 1A.&nbsp;A better circuit such as the PQ30RV21 (uncommon, I know )&nbsp;has just a max. dropout voltage of 0.5V and a max current of 2A but you'll need some cooling as well. You see that wouldn't be the right solution anyway.<br> <br>If you have another idea, energy loss-less in common use, I'd be glad if you submit it and I'll include it into the instructable.
Still, this site is mostly used in north american countries, and a large group of the people on this site don't understand exactly how electronics work, and without a voltage regulator would fry their devices, I've seen it in loads of comments that go &quot;blah blah blah you made me destroy my device&quot;. Generally it's best to assume people know less that you think they do.
I added the following:<br> <br><br> <br><strong>&quot;a large group of the people on this site don't understand exactly how electronics work&quot;</strong> said XOIIO and he's maybe right. If you don't understand what is meant in the following paragraph and the reason why this projekt is nothing for you. (Serch for &quot;regulated DC&quot; if you still want to do this and inform yourself)<br> <br><strong>Missing knowlege can destroy your devices. I don't want to hear &quot;blah blah blah you made me destroy my device&quot; afterwards.</strong><br> <br><br> <br>Is that ok from your point of view?
I don't even need credit, I just like to see that everything is explained thouroughly because like I said a lot of people don't know enough to do this properly, or take for granted the fac that this instructable doesnt teachthem everything.
how different is this workshop compared to simply using an active USB hub or a powered USB hub? <br> <br>Just take a two or four port USB hub, use a 5V 1A power supply adapter and connect it to the USB hub, you can get a fully working 4-port USB charger cum USB hub whcih can be connected to the OGT or the PC and used anyway. Soldering is not everyone's game.. then getting parts and running the risk of wrong connections can be fatal to the devices... (for noobs of course) <br> <br>well, the workshop is a great idea, but i still think the USB hub is a cheaper and better alternative... <br> <br>your comments please...? <br>
Yes a powerd USB Hub works in these situations as well, but it's bigger and expenciver (compared to 0$ if you have all the stuff right at home). This was kind a hollyday project for me as well, you might understand the sense if your parents don't like you being at the computer all time :D.<br> <br>If you're not familliar with soldering (or if you have just a rusty 20W soldering iron) go on and buy a device of your choice. The main difference is that a hub has electronics build in, which might cause errors or slow down the max. data speed.
on the other hand, a USB port would supply 500 ma of current. if it is shared with another USB device (HDD or Flash drive) it would share the current and the charging of the phone would be terribly slow..... <br> <br>What do you think?
No, actually not. A USB stick drains less than 10 mA 490 will still be left for other devices. A Hard drive AND charging something would be imposseble caus it would be above 1.5A (1500mA). But iif you have a powerful external power supply (mine has 2A) it should be possible. <br>Btw: Most PC's have one regulator for two or even more USB ports Wich meens 2 ports have 1A in total. This way it's possible to charging something AND power a keyboard AND power a mouse with just two ports. <br>Did this information helped you?
Cool project! I can tell by your diagram though that this will not work on iPods. To do this you need resistance or power on the data pins. These are pins 2 and 3.
There's a second one bro, just for you :D. Now seriously, I'am using the simple version cause I haven't any apple devices. Step 10 explains how it should word for these. <br>Cheers
on the other hand, a USB port would supply 500 ma of current. if it is shared with another USB device (HDD or Flash drive) it would share the current and the charging of the phone would be terribly slow..... <br> <br>What do you think?
instructables seems to have a problem with display comments to the pictures. That's not my fault and I hope it will be fixed soon.

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Bio: I'm kind of perfectionist, but don't expect perfect grammer and usage of words cause I'm not a native speaker.
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