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Re: Can I use an iPad charger to power the raspberry pi?

Posted: Tue Mar 20, 2012 9:45 am
by ashleysands
My iPad 1 power charger outputs 5.1 Volts and 2.1 amps. Is it bad that the charger has a higher volt rating than what the raspberry pi can handle?

Regards,

Ashley

Re: Can I use an iPad charger to power the raspberry pi?

Posted: Tue Mar 20, 2012 9:49 am
by Burngate
5.1 V is within the USB spec, so that would be ok. And the 2.1 A is plenty for the RPi (which will only take what it needs)

Also, if it's a genuine Apple device, its quality should be good.

Re: Can I use an iPad charger to power the raspberry pi?

Posted: Tue Mar 20, 2012 10:11 am
by Jongoleur
And provided the lead for your iPad 1 power charger doesn't terminate in the bonkers proprietary iConnector.  If it's a microUSB that inserts into the iConnector then you'll be ok.

Re: Can I use an iPad charger to power the raspberry pi?

Posted: Tue Mar 20, 2012 10:17 am
by pandapi
Jongoleur said:


And provided the lead for your iPad 1 power charger doesn't terminate in the bonkers proprietary iConnector.  If it's a microUSB that inserts into the iConnector then you'll be ok.


The ipad chargers (well the ipad 2 at least) is a plug with a standard usb port on it. You can detach the cable and charge any old usb thinger

Re: Can I use an iPad charger to power the raspberry pi?

Posted: Tue Mar 20, 2012 1:48 pm
by abishur
pandapi said:


Jongoleur said:


And provided the lead for your iPad 1 power charger doesn't terminate in the bonkers proprietary iConnector.  If it's a microUSB that inserts into the iConnector then you'll be ok.


The ipad chargers (well the ipad 2 at least) is a plug with a standard usb port on it. You can detach the cable and charge any old usb thinger



Well to be fair, even though it ends in a standard USB connection, it still ignores the USB standard for identifying itself as a high powered port.  USB standard states that a high powered USB port is identified by jumpering the data pins (some sources say you need to put a resistor between the pins).  Apple, in order to claim a proprietary design and charge licensing fees to any company wanting to make a charger for their devices, does this by using a series of resistors on the power lines.

I recently bought a car adapter that took a car charger port and gives two usb ports.  In order to get it to provide anything other than 100 mA I had to crack it open and solder the data pins together.  I'll be interested to see if the r-pi also has this issue, or if it was more a problem of my phone being too intelligent just to automatically take the power it needed.

Re: Can I use an iPad charger to power the raspberry pi?

Posted: Tue Mar 20, 2012 2:06 pm
by ashleysands
Burngate said:


5.1 V is within the USB spec, so that would be ok. And the 2.1 A is plenty for the RPi (which will only take what it needs)

Also, if it's a genuine Apple device, its quality should be good.


Thanks Burngate.

Re: Can I use an iPad charger to power the raspberry pi?

Posted: Tue Mar 20, 2012 4:18 pm
by rurwin
Abishur said:

I recently bought a car adapter that took a car charger port and gives two usb ports.  In order to get it to provide anything other than 100 mA I had to crack it open and solder the data pins together.
Thanks for pushing my face into it Abishur. Of course that's what I need to do to get mine working too. When I got it two years ago it just didn't work and it was a dark mystery that I did not want to get into; now suddenly I understand what is going on, why it doesn't work and how to make it work. The Raspberry Pi is already educating me, and it hasn't even been shipped yet.

Re: Can I use an iPad charger to power the raspberry pi?

Posted: Tue Mar 20, 2012 5:03 pm
by abishur
rurwin said:


Abishur said:


I recently bought a car adapter that took a car charger port and gives two usb ports.  In order to get it to provide anything other than 100 mA I had to crack it open and solder the data pins together.


Thanks for pushing my face into it Abishur. Of course that's what I need to do to get mine working too. When I got it two years ago it just didn't work and it was a dark mystery that I did not want to get into; now suddenly I understand what is going on, why it doesn't work and how to make it work. The Raspberry Pi is already educating me, and it hasn't even been shipped yet.



While I should take your admiration and run with it, I'm a numbingly stupid honest man.  :-p  The only reason I knew this little tidbit was because someone in the review section of amazon wrote it out for me too   They even explained the fact that it wasn't a defect, it was specifically designed for iDevices so I even stole that little tidbit of knowledge

Re: Can I use an iPad charger to power the raspberry pi?

Posted: Wed Mar 21, 2012 1:12 am
by ashleysands
Abishur said:


rurwin said:


Abishur said:


I recently bought a car adapter that took a car charger port and gives two usb ports.  In order to get it to provide anything other than 100 mA I had to crack it open and solder the data pins together.


Thanks for pushing my face into it Abishur. Of course that's what I need to do to get mine working too. When I got it two years ago it just didn't work and it was a dark mystery that I did not want to get into; now suddenly I understand what is going on, why it doesn't work and how to make it work. The Raspberry Pi is already educating me, and it hasn't even been shipped yet.


While I should take your admiration and run with it, I'm a numbingly stupid honest man.  :-p  The only reason I knew this little tidbit was because someone in the review section of amazon wrote it out for me too   They even explained the fact that it wasn't a defect, it was specifically designed for iDevices so I even stole that little tidbit of knowledge


At least you're honest Abishur.