Linked Questions

6 votes
2 answers
10k views

Can Rpi3B+ power two USB SSD drives?

Can I power two usb drives using USB to satas or do i need a powered USB hub?
sealfab's user avatar
  • 209
2 votes
1 answer
12k views

What are the Electrical Specifications of GPIO pins?

What are the Electrical Specifications of GPIO pins; current limits and voltage levels?
Milliways's user avatar
  • 60k
5 votes
2 answers
13k views

Is a 2.4 A 5V USB charging port enough to drive a Pi 3?

So its a qualcomm quickcharge enabled smartphone charging port. The recommended amperage for the pi3 is 2.5A, does the 0.1A make a difference? Also what is the difference between a charger and a ...
Strangeluv's user avatar
6 votes
3 answers
4k views

How to protect Raspberry Pi when powering via 5v pin?

I have reglaurly heard that while it is possible to power the Raspberry Pi via the 5v rail, you do so at your own risk. This is because the rail lacks any of the protections that the USB port has ...
SCB's user avatar
  • 195
4 votes
2 answers
8k views

Will an anker powerport+ work to power multiple pi's?

I'm not an electrical engineer so apologies for the rather basic question. I've found myself with multiple pi's and felt it was about time to look for some other power solutions other than powering ...
nbz's user avatar
  • 143
5 votes
2 answers
11k views

How Can My Raspberry Pi 3 B+ Power All My Devices?

I have a bunch of questions. I have searched LOTS but I can't seem to figure this out. I hope an expert can answer this for me. I read that a Raspberry Pi can only output 0.6A for those 4 USB ports in ...
May's user avatar
  • 105
2 votes
3 answers
11k views

Will 3.3v gpio work for a fan without hurting the pi?

Will it hurt the pi if I run a fan on the 3.3v gpio? I have a hdmi lcd screen on mine and I don't want to use the usb ports for a fan. I have a raspberry pi 3 by the way
kyran bullard's user avatar
3 votes
3 answers
9k views

Can I power Raspberry Pi (newer models) from 3.3v Supply Alone?

Many years ago, I've noticed that one without requirements of any 5V devices like USBs, he/she can completely bypass the power input circuit and the regulator. Feeding Pi Model A with power from v3.3 ...
比尔盖子's user avatar
5 votes
1 answer
10k views

RPi 3 blinking Red and Green light

I have a couple of RPI which I use regularly. Recently, I have been seeing Red and Green light blinking on my RPi. Rpi works great. I just couldn't understand why both the lights are blinking as it ...
dhruvvyas90's user avatar
  • 2,853
4 votes
1 answer
17k views

RPI3 USB port current?

I am using a RPI3 and have a GPS USB module and 3g USB dongle connected to the USB ports of the pi. I am using a 5 volts, 2.4 amps power supply. I was wondering if the RPI3 USB ports provide 1.2 Amps ...
bobdxcool's user avatar
  • 171
3 votes
3 answers
5k views

Bad to have undervoltage?

I constantly have the yellow light showing on the top right of the screen. Which means that the pi doesn't get enough power. I have a 5 volt and 2,1 amp adapter. Is this bad in anyway or could the pi ...
Wolle's user avatar
  • 31
9 votes
2 answers
5k views

How much power does a Raspberry Pi Need?

I have a Raspberry Pi 3 Model B and it seems like it's always low on power. You can see this by the lightning bolt on the top right corner. I started out by plugging the USB power into a 1A iPhone ...
Adam Oakley's user avatar
5 votes
1 answer
5k views

Monitor Raspberry pi undervoltage warning over time

I am looking to find a way to monitor the under-voltage warning over a longer period of time, preferably also what it currently reads as the voltage. The reason being I would like to fuse the data ...
BarrowWight's user avatar
0 votes
1 answer
14k views

The Pi Zero W has 5v and 3v rails. What is the max current per GPIO pin on the 5V rail?

What is the max current per GPIO pin on the 5V rail of the Pi Zero W? Also, can I power a 5V relay (4 channel, each requiring 15-20 mA) from this rail? If not, does anyone know of a 4 channel relay ...
holtc's user avatar
  • 103
2 votes
4 answers
7k views

Supply 3.3V via GPIO header (Pi3)

I need to power a Raspberry Pi 3 via its GPIO header: I have a beefy regulated PSU capable of providing stable 4.98V, which I planned to route to the 5V pins of the Raspberry as stated in this answer: ...
Francesco Bertolaccini's user avatar

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