Linked Questions

4 votes
1 answer
2k views

Safe to power Raspberry Pi 3 with 5.25 v out of BEC?

So I'm using a Lipo to power my Pi 3 and to be safe, I installed a 5v 3A UBEC. Upon checking the voltage output, I saw the BEC was only stepping the voltage down to around 5.25v, rather than 5v. I ...
Rob Roberts 's user avatar
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
1 answer
470 views

Does Raspberri Pi recover from throttling?

I have a Raspberry Pi (3B+) in a setup, where during boot process may a small undervoltage occur (under certain conditions). However, I found out, that it never leaves the "throttled" state ...
Jan Koupil's user avatar
2 votes
1 answer
77 views

Raspberry Pi undervoltage strange issues

So I have an old Rpi2 B, and I was getting an undervoltage error trying to run OctoPrint on an old bundled PSU. I swapped for a 5V/4A PSU with the same error, I only have the power supply and an ...
Josh's user avatar
  • 21
2 votes
1 answer
171 views

Which peripherals remain powered when the raspberry pi 4 model B enters poweroff state?

When I ran the command poweroff in ubuntu 19.10, I noticed that both the Ethernet port and USB ports remain powered even when the rbp4 seemed to have halted. Others using rasbian seem to have had ...
Tenders McChiken's user avatar
2 votes
1 answer
1k views

Raspberry Pi Shows Low Power Lightning Bolt When Only Using 1 of 3 Amps

My Raspberry Pi 3B+ is running Kali Linux on the official 7" display. I am using an Anker power bank that says: "5V=6A (3A max per port)" in the description. When using the Pi, it constantly shows the ...
Louie Kotler's user avatar
2 votes
1 answer
6k views

Can I use my S7 edge charger for my Raspberry Pi 3 Model B?

I have no charger atm and I am a bit strict on money right now. Anyways, I have a spare Samsung charger and it has 2 values. 9V = 1.67A 5V = 2A It's a fast charger so I don't know what applies to ...
Clark's user avatar
  • 33
2 votes
1 answer
1k views

Is having no red light normal while the RPi 3B works?

When I'm using my RPi 3B powered by the micro-USB port (5V 2.4A) and I happen to use a USB extender for the power cable, the RPi 3 seems to boot up and work fine except for the fact that the red light ...
RSS's user avatar
  • 21
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
  • 60.5k
2 votes
1 answer
2k views

No power on Pi-3 USB ports after 2 succesful booting

First time on the Raspberry Pi family, I just unboxed my Pi 3 model B with two successful boots after installing Raspbian. Later I tried to boot again and I got a yellow flash symbol at the left side ...
ellooku's user avatar
  • 156
2 votes
1 answer
2k views

RPi model 2 - USB ports receive no power

The USB ports on my Raspberry Pi 2 model B V1.1 do not receive any power. I measured the USB pins with a multi-meter, which should have 5V, but have none. I tried different power supplies, which work ...
Kevin Matsubara's user avatar
1 vote
1 answer
154 views

Can the Raspberry Pi 4B power 2.5 hard drive and SSD without a USB hub?

Does Raspberry Pi 4 model B power one 2.5" Seagate 2TB external hard drive and a M.2 SSD connected via USB? Will official power supply suffice powering both and Pi? Any help or insight is highly ...
hulk_in_the_spa's user avatar
1 vote
1 answer
66 views

Supply (under) voltage problem

I have a solid PSU putting out 5.4VDC capable of 60amps/300watts. I have 5.4VDC going into the Pi3, but get the lightning bolt/undervoltage condition. On Pins 2 & 6 on the GPIO I'm only getting ~4....
Hax's user avatar
  • 13
1 vote
1 answer
97 views

RPi 4B USB port power rails connection

I want to connect two external hard drives to the RPI4B. Since the Pi can not provide sufficient power for both of them, external power source is must. Are the USB power rails shared between all four ...
Yogesh's user avatar
  • 13
1 vote
1 answer
6k views

Can I power a RPi 4 model B via a 5V/2A fast charging adapter?

It says 5V/3A in technical specs, I wonder if that 3 A is a must, or is there anybody who can power RPi 4 model B via a standard 5V / 2A smart phone adapter. Specifically, I would love to hear ...
muyustan's user avatar
  • 113

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