Questions tagged [usb-power]

Relates to powering USB devices from the Raspberry Pi

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1answer
114 views

Mirabox Capture Card and External Power Source

I'm looking to power my Raspberry Pi 4B from a 12V tractor battery. I have a buck converter which can be found here. I am considering using this device to step-down the battery voltage and hook up the ...
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3answers
35 views

Is there any advantage powering up a RPi 4B with a PSU rated for 8A @ 5V?

I have a Raspberry Pi 4B 4GB RAM variant that will be running 24/7 with the following attachments: an ethernet cable leading to a router for internet connectivity a 2.5" external HDD attached ...
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1answer
35 views

Can I use USB 3.0 port to power RPI4 + external SSD?

On the Pi-4B, can I use one of the USB 3.0 ports for power, instead of the USB-C port? I will be powering the Pi-4, an SSD drive (Sabrent 512GB Rocket Nano), and a Conbee II — which btw currently ...
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0answers
70 views

Is it safe to power Raspberry Pi Zero 2 W directly from computer?

A great feature of the Raspberry Pi Zero is that you can tether it to a PC, Mac or iPad Pro by connecting it directly to a USB port. It can act as a USB-Ethernet-adapter and you can ssh into the Pi. ...
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2answers
36 views

Phone charger for powering Pi 4?

Good day, I just bought the Raspberry Pi 4 Model B 2GB RAM and I forgot my charger at my house which I won't be able to get to in a few weeks. I was wondering if I could power the Raspberry Pi using ...
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2answers
40 views

Can I use a 3A/5V phone charge for powering my pi 4?

I have a completely fine and working type C charger with a stable voltage supply. The concern that I have is that my pi 4 is going to run 24/7 performing web scraping and analysis. Surely I have a ...
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1answer
31 views

Can you damage the pi's USB controller by constantly applying and removing power to it?

I have a pair of USB powered fans. I currently have them connected to a Raspberry Pi 3b+ via one of the USB-A connectors, drawing power from the pi. I have two cron jobs set on the pi - one that ...
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0answers
39 views

Error opening device /dev/video0: video capture not supported

I am trying to set up USb camera with RPi4. It is working well with PC windows10 default 'camera' application but failed with RPi4. I use mjpg-streamer to access the streaming. /usr/local/bin/...
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1answer
63 views

Raspberry Pi 4 B unmounting and mouting intermittently

I had two drives on my Raspberry Pi 4 B and they kept being unmounted, I moved one to my router and it seems to be working fine now... I read about max_usb_current=1 doesn't make any difference on ...
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57 views

Pi Zero 2: insufficient power from USB port

i want to use my EzCap269 video grabber with my new Pi Zero 2. Unfortunately the video grabber won't work (power led is off) - so i assume it's getting not enough power (it's a USB3 device). I'm using ...
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4answers
246 views

Power Requirement for Pi 3

I have a Raspberry Pi 3 Model B, and I wish to make a tablet with it. I am using the WaveShare 7inch touchscreen, the pi camera V1, a USB hub and an external CD/DVD drive. But when I got everything ...
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1answer
261 views

How to recover Raspbian/Raspberry Pi OS boot media after power failure

There are many questions similar to mine and none with a coherent applicable answer. Setup Raspberry Pi OS Buster; up to date. Raspberry Pi 4B. Red LED has a steady glow: current is stable. Both ADATA ...
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1answer
52 views

Does the power port of the Raspberry Pi 3a+ have lines for transfering data?

Im getting a Pimoroni Power On Off Shim for my Pi 3a+ and wonder if i could use the original power micro USB-port for data stuff, like connecting a 3D printer or a webcam - since the 3a+ lacks ...
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1answer
168 views

USB OTG with power supply connection to Raspberry Pi Zero

I have connected my 5.2 V 2 A tablet charger to power USB port of Raspberry Pi Zero and USB port to my Linux OS Lenovo laptop, according to this post I must cut the 5 V pin of USB PC port, but I didn'...
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2answers
69 views

Attaching second raspberry pi to a USB hub already connected to a Pi

What would happen if I attach a raspberry pi (A) to a USB hub for power which is already connected to a second raspberry pi (B) powered by an adapter (but connects to devices such as HDD, keyboard etc ...
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1answer
106 views

rpi kind of turns off (not accessible by ssh / vnc, red light on), var/log with regulatory domain

I am using a rpi3 with an external usb disk and a 3A power source, but the system seems to turn off after 1-2 days of normal use. I know that because I cannot access it (ssh or vnc), but there is a ...
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0answers
42 views

Cutting power to USB port on a RPi 3A+

I am running a Raspberry Pi 3A+ in my car as a DIY Android Auto head unit (using Crankshaft). In order to not have the RPi immediately shutdown when you remove the key from the ignition (or have it ...
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1answer
341 views

Problem installing Bluetooth Dongle on Raspberry Pi 3 running Windows 10 IOT Core

I recently bought the plugable Bluetooth USB adapter usb-bt4le and I want to use it with my RPi3. I have windows 10 core IoT installed on the RPi. I have disabled the on-board bluetooth and I wish to ...
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1answer
71 views

Powering multiple hdds to work with raspberry pi 4

I have a rpi4 with the default 5v 3A charger. However, when I hook up all my usb peripherals (2 mechanical hdd and a cc2531) I run into power limitations and things do not work properly. I am thinking ...
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1answer
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, ...
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2answers
503 views

Connect USB hub to RPi 4 USB C port to power the Pi and access peripherals?

I want to connect an RPi 4 to a bunch of USB peripherals and a power source that are about 3m away from the Pi, using only one USB cable (because that seems a lot neater than multiple cables and ...
77
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2answers
104k views

Raspberry Pi Power Limitations

There are very many, often contradictory, claims about the power requirements and limitations of the Pi. What are the exact requirements?
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0answers
12 views

Programatically disconnect & reconnect a USB port or ethernet port [duplicate]

I have a device that is attached to the USB port on my RPi4 that sometimes has to be reset. The RPi4 is too far for us to physically disconnect/reconnect the USB cable so right now we are just ...
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3answers
431 views

Can the Raspberry Pi work with Ethernet using a USB-Ethernet power adapter?

I have a Google Chromecast Ultra power adapter which includes Ethernet. My thinking, this is a USB to Ethernet adapter that also provides 5V power. Does this work with the Raspberry Pi Zero W to give ...
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3answers
52 views

How can I power a 4B from a DC power supply

I'm making a NAS with a Pi 4B, powered by a Meanwell RS-25 (5v 5a) psu. However, as far as I know, the Pi can only be powered via USB C, but the problem is all my breakout boards are limited to 500ma....
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0answers
144 views

Pi 4 doesn't recognise SSD

I bought new Pi 4 8GB from authorised seller including power cable. It recognises HDD and works fine. But it doesn't recognise SSD (crucial mx500 1tb sata 2.5-inch 7mm internal ssd). This SSD works ...
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0answers
29 views

Connecting hub to 1 USB port vs 2 USB ports?

The Pi 4B has 2x USB 3.0 ports. I have 2 choices to connect my hard drives: Using a single 10-port hub which connects to 1 USB 3.0 port. Using two 5-port hubs which connect to two USB 3.0 ports. ...
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1answer
58 views

USB unmounts after first access

I am currently running Raspbian Jessie on a four-node Pi cluster server. I run an nginx load-balancer on one, and three Apache2 server clones on the others. I recently added a new domain and virtual ...
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0answers
24 views

Is it safe to change the power settings to allow raspberry 400 to power using usb?

I recently got a raspberry pi 400 and wanted to use it as a portable device but realised that it can only get full power when plugged into a power socket. I saw a video showing that you can use it ...
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1answer
231 views

Are schematics available for the newer RPi 4 with fixed USB-C power circuit?

Early editions of RPi 4 had hardware design issues in the USB-C port. (Ref: 1) Since then an updated board has been issued. However the official schematics still show the old USB-C Power In circuit (i....
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2answers
184 views

over-current condition on usb port when connecting arduino nano

Hi I am trying to power an arduino nano via usb port. I am using a 5V 3A power supply. I have 2 different usb cables. One lights up the arduino, but it is not recognized in /dev/ttyACM0 The other one ...
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1answer
57 views

Raspberry pi voltage between PP3 - PP27 is 0.01V is this normal?

I measured voltage using a multimeter between PP3-PP27 and it was fluctuating between 0.01V to 0.06V is this normal? The entire problem can be found here: USB ports recieving power but not working on ...
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0answers
214 views

USB ports recieving power but not working on Raspberry Pi 3B

I use external harddisk(connected via USB with its own power supply) to boot into dietpi on my raspberry pi. It works okay for a day(even with multiple reboots and poweroff). But the next day RPi ...
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1answer
124 views

Can USB ports blow polyfuse on Raspberry Pi 3B?

I suspect my RPi 3b polyfuse to be blown, but I don't know what's causing it. I'm using an external HDD for booting into DietPi with its own power supply and after every day or so all the USB ports ...
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2answers
67 views

Does Raspberry Pi 3B have polyfuse? Can USB ports blow polyfuse? [duplicate]

Does Raspberry Pi 3b have polyfuse? If it does, under what conditions can it be 'blown'? I suspect my RPi 3b polyfuse to be blown, but I don't know what's causing it. I'm using an external HDD for ...
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0answers
97 views

No power to usb ports on raspberry pi 3B

I use external harddisk(connected via USB with its own power supply) to boot into dietpi on my raspberry pi. It works okay for a day(even with multiple reboots and poweroff). But the next day RPi ...
0
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1answer
50 views

Powering raspberry pi using VGA port of a display monitor

Does anyone have an idea if you could use the VGA port of a standard display monitor to power the raspberry pi? Obviously you would need a 'VGA to USB' adapter but then would it be possible
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3answers
53 views

Performance of the Rasperris

The Raspberry pi 4 has a power supply that can deliver a maximum of 15.5 watts. How much power exactly does the Raspberry use without overclocking at maximum power so that I can connect the ...
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2answers
6k views

Why are there delays and input issues when using my wireless keyboard?

I booted up my Raspberry Pi for the first time and I plugged in my USB dongle for my wireless keyboard and mouse. It booted up fine but when I type keys either don't appear on the screen or they ...
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3answers
5k views

Raspberry Pi 3 Model B (not B+) USB polyfuse location

Usual problem - USB power has gone. Where is the fuse located on the board? The reduced schematics on the RPi webpage does not show the USB at all.
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5answers
35k views

How can I cut power coming out of the Pi's USB ports?

I have a simple device connected to the Raspberry Pi, a small USB fan. The problem is that the fan does not have a on/off switch so I must unplug the fan every time I want it to stop. My question is: ...
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2answers
45 views

How voltage tolerant is the RPi 3 A+ micro-B USB power connection? [duplicate]

I've been reading about power supply requirements for RPi and want to learn more about the practical limits in addition to the design limits. What is the power protection circuit (if any) on the micro-...
0
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1answer
65 views

Use Pi to control power to usb-connected device

I have a digital microscope connected to my pi (usb) that you can use in a browser with a java web app that I have written. The microscope is also powered through the usb. There is no on or off switch,...
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4answers
16k views

USB Powerbank for Raspberry Pi 4

Is it yet feasible to use a USB powerbank to power the Raspberry Pi 4B? Are there any that you've successfully tried and could recommend? Can a 2.4A USB-C bank work?
14
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1answer
11k views

Can the Pi 4 power 2 external USB 3 HDDs?

I would like to connect two external 2.5 HDDs a Pi 4. Can the Pi 4 power two of them at once? This is the model I have in mind: WD 2TB Elements
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2answers
79 views

Powering External Devices

I am wanting to use a Raspberry Pi 3 to communicate with two Texas Instruments CC2538s (over serial USB), I am wondering if the RP will be able to provide enough power over its USB ports to power ...
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3answers
771 views

Raspberry Pi Zero - split power

Given that the RPi Zero consumes about 1A, and I have a power adapter that gives 2.4A of DC output - I'd like to use the spare ~1.4A to power up some stuff on the throughhole board. Will that be ...
4
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8answers
6k views

RPI4 won't boot with powered USB hub

I have an RPI4 running a Plex server, Pihole, etc etc. Power kept dropping while running certain tasks involving the attached HDD, so I started using a powered USB3 hub - problem solved. But now the ...
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2answers
6k views

How big of a power supply do I need to power a 3B+?

This chart shows the Pi 3B+ drawing upwards of 5.6 W under load. I know they recommend a 2.5a power supply, but is that an exactly accurate number? Would 2.4a be enough? How powerful of a power supply ...
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1answer
6k views

What could be causing "over-current change" all the sudden?

This is a Raspberry Pi 2 using a 5V 2 Amp power supply running with a LaCie 2TB USB external drive connected via the USB port. It gets its power from the USB port for the drive. The above has been ...

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