Linked Questions

0 votes
4 answers
2k views

Powering hard drives without a powered USB hub?

How can I power a hard drive so I can use it with my Pi without using a powered usb hub? Can I use a small power supply?
Jordan Baron's user avatar
0 votes
2 answers
2k views

Powering Raspberry PI Zero W using IC 7805 Voltage Regulator

I want to know if its possible to power PI zero w using 7805 voltage regulator. Max current rating of 7805 is 1A. What is the max consumption of PI zero W? Would it require more than 1A of current? I ...
Vedant's user avatar
  • 1
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
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
-1 votes
1 answer
2k views

GPIO solution to power Pi [closed]

Looking for a GPIO solution to power a Pi 3 B+. Basically, trying to bypass the Pi micro USB connector. Also, any suggestions on hardware to build a compact, inverted, USB male right-angle ribbon ...
Al Keegan's user avatar
1 vote
2 answers
708 views

Lots of LEDs in a chain

I need to control about 90 LEDs with a Raspberry Pi. I am thinking of doing with with 3 chains of 30 LEDs, so I can control each set of 30 LEDs independently (turn 30 on and off at a time) and change ...
Matt B's user avatar
  • 19
1 vote
3 answers
2k views

External HD not spinning up even with max_usb_current=1

I have a Raspberry Pi 3 to which I need to plug an external HD. Such HD is a WD My Passport, which is powered directly from USB and it works perfectly with my laptop. At the first connection attempt, ...
Michele's user avatar
  • 111
1 vote
1 answer
1k views

Using Both +5V GPIO Pins for More Current?

According to this website: https://pinout.xyz/pinout/pin2_5v_power# The +5V GPIO pins can push up to 1.5A of current, and are attached directly to the Pi's power supply. My question is, if I use ...
Tim Morris's user avatar
0 votes
2 answers
2k views

Is it safe to use an unpowered HDMI to VGA converter on Raspberry Pi 3?

I know there are a lot of questions similar to mine and this question may be regarded duplicate, but I believe my question is different. As you may know most of questions are concerned about using an ...
user avatar
-1 votes
1 answer
2k views

Raspberry Pi Low Power Warning

RPi Model B+ Raspbian 7.11 Kernel 4.14.41-v7+ I've been getting low power errors during startup (lightning bolt), and continue to see them in my syslog. I have tried multiple different USB cables, ...
iwantmyphd's user avatar
0 votes
2 answers
1k views

Red Led flashing

I have a PI 4, WHEN using a 3.5A USB power measured 5.1v supply, the red LED is constantly on. When using a power supply which was rescued from a DVD player, checked supply 5.1v I get a flashing red ...
FXV300's user avatar
  • 9
0 votes
1 answer
2k views

Raspberry Pi Power Issue with micro usb

I am using a proper voltage and amperage power supply as well. 5V 3A (it is a long cable so needed more amps). Anything less than 3A does not even turn the pi on at all. Please Help! I currently have ...
Fyb3roptik's user avatar
1 vote
2 answers
2k views

Seems to work fine, but the red light is sometimes off

I bought a 2.1A USB charger for my Raspberry Pi 3. I wasn't sure if it would work since RPi 3 requires 2.5A, but when I tried, it did. Then I bought two power banks (2A and 2.1A) to supply power to ...
CrystalMV's user avatar
1 vote
7 answers
900 views

How to daisy chain the power across two Pi's

Similar to Can I power a Pi through a 5V pin?, but I want to acquire the 5V power source from another Pi. The first Pi gets its power via micro USB, and then I want to use pins 2 and 6 from that to ...
Andrew Arnott'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

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