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We are using Raspberry Pi Model B: We used USB connector from PC - confirmed output - 5V, with 2 leads: Connected +5V to Pin 2 Connected GND to Pin 6 on connector - GPIO Connector RPi

Inserted Ethernet cable connected to the HUB/Router. We see the following LEDs: PWR - Solid RED ACT - Slow Blink GREEN TDX, LNK, 100 - OFF

Question: Do we need to power other GPIO pins as well example 3v3 or the other 5V (pin 4) to power the PRi? Or what are the pins we need to power to power the RPi?

Thanks.

SafetyDevice
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    please remember that by powering through the GPIO you are over passing the fuses that the pi uses for safety reasons. When you do so you have to be sure that your power supply will work as a charm always :) – javirs Apr 09 '14 at 13:13
  • We will consider safety once this issue is resolved...Our tests have shown us that Raspberry PI cannot be powered from the GPIO pins. Has anybody successfully done this? – SafetyDevice Apr 20 '14 at 08:02
  • @javirs The polyfuse is not there to protect the RPi. It's there to prevent your power supply from catching fire in case the RPi fails. – Dmitry Grigoryev Feb 15 '19 at 10:26

1 Answers1

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Powering (with 5V) via one 5V pin and one ground pin is sufficient. You can use more but it's not needed.

joan
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    You can use more but its not needed ? Use more what? 3.3v,2.5v and 1.8v comes from 5v. – Piotr Kula Apr 11 '14 at 14:34
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    I was referring to more than one 5V pin or more than one ground pin. – joan Apr 12 '14 at 08:42
  • Can you explain a bit more please. I still dont understand. You mean conenct 5v to the USB port, the GPIO and also Testpoint at the same time? – Piotr Kula Apr 13 '14 at 10:06
  • The question is about powering the Pi. Normally you power the Pi via the microUSB socket. Alternatively you can power the Pi by supplying 5V to P1-2 and ground to P1-6. The OP shows a diagram of P1. – joan Apr 13 '14 at 11:48
  • I have read many posts mentioned here and elsewhere including youtube videos claiming powering from GPIO, but what is answered in the posts does not seem to hold in practice hence a re-post. Has anybody tried powering RPi from GPIO? – SafetyDevice Apr 20 '14 at 08:07
  • I've been powering a Pi via P1-2 (5V) and P1-6 (GND) for about 2 years. The power source is a 5V 4A UBEC running from a 12V laptop power adapter. I don't understand why you don't just try if you don't believe what you are told. – joan Apr 20 '14 at 10:57