pater
Posts: 2
Joined: Mon Jun 04, 2012 9:09 am

voltage regulator for GPIO power supply

Mon Jun 04, 2012 9:12 am

Hello,
I have a question regarding to powering raspberry through GPIO. Does it contain voltage regulator like arduino or we need to supply it exactly 5 v ?

regards,
pater

pater
Posts: 2
Joined: Mon Jun 04, 2012 9:09 am

Re: voltage regulator for GPIO power supply

Mon Jun 04, 2012 10:23 am

it is not understandable for me. According to wiki :
Power source:[5] 5 volt via MicroUSB or GPIO header

I kept searching and found this http://elinux.org/RPi_Low-level_peripherals . Due to this spec it seems that first pin is 5 Vout not Vin. Could someone clarify it for me ?

hippy
Posts: 6853
Joined: Fri Sep 09, 2011 10:34 pm
Location: UK

Re: voltage regulator for GPIO power supply

Mon Jun 04, 2012 11:06 am

There is no regulator for the 5V rails. You need to provide 5V (+/-5% AFAIR). Supplying power via GPIO power pins will also bypass the power inlet fuse so it is recommended to add your own fuse on the external supply.

You can find schematics of the R-Pi board on the Wiki.

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