Questions tagged [usb-power]

Relates to powering USB devices from the Raspberry Pi

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0answers
178 views

Pi 3 - insufficient USB power available for dual-band Wi-Fi adapter?

This question says "How much current can draw from the USB ports? ......The limit for Pi3 is 1200mA." However, my Rosewill RNX-N600UB Wi-Fi dongle will only operate in the 5 GHz band when plugged ...
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0answers
908 views

Trying to get 3g connected to Raspberry pi

So I have on hand a 3g usb dongle that I'm trying to get connected to the raspberry pi, I've used the process described in: https://www.thefanclub.co.za/how-to/how-setup-usb-3g-modem-raspberry-pi-...
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1answer
2k views

Power Supply for PI Zero [duplicate]

I was thinking about getting a cable for Pi Zero, this one: https://www.adafruit.com/products/1995 But it's 2.4 ampere, won't that overcharge the little Pi Zero and damage it? The specifications say ...
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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 ...
5
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1answer
574 views

Pi Zero OTG with backup power?

I have my Pi Zero connected to my laptop in OTG mode and it is scheduled to take temperature readings every 5 minutes, then send the data to the laptop on the hour. I was wondering if I was able to ...
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1answer
1k views

Raspberry pi powering issues

I am using Raspberry Pi 3 with latest pixel image: Linux raspberrypi 4.4.21-v7+ #911 SMP Thu Sep 15 14:22:38 BST 2016 armv7l GNU/Linux In the right top corner of the connected lcd screen, there is a ...
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0answers
612 views

Raspberry Pi B+ power-supply and USB problems

I have two Raspberry Pi B+. One of the two is rather unstable (details below) and I would like to understand if it is just a defect or if I might have broken it so that I can avoid making the same ...
2
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1answer
1k 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 ...
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1answer
72 views

Raspberry Pi 2 with Raspbian Jessie Lite

I have a Raspberry Pi 2 Model B+ with an SD card with Raspbian Jessie Lite operating system. I have also installed a program that allows the Pi to become hotspot every time it starts. When I plug ...
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1answer
1k views

Audible humming when using USB-powered speakers on the RPi

I've built up a little stereo speaker system with USB-powered speakers(just powerd by USB, sound still comes from the 3.5mm jack) and the RPi 3. When I use the speakers on a seperate outlet everything ...
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2answers
267 views

Pi Zero overlay to swap power and data usb ports?

I have some right angle OTG cables that I can't use with the Pi Zero. They collide into the power cable. Is there any way to swap the purpose of the two ports so that the right angle cables for data ...
3
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1answer
11k views

Does a USB hub work with Raspberry Pi Zero?

I have a Raspberry Pi Zero with one mini cable to USB wire which I used to today to connect a USB hub. The items connected to USB are not working. It's a USB wire powered hub. Is it safe to attach it ...
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1answer
487 views

Is that possible to connect laptop to raspberry pi 3 through micro usb power port?

Hello recently I bought raspberry pi 3 kit, and I hope to make a smart mirror. Imagine If I make smart mirror successfully, and want to give to my girl friend. The raspberry pi are assembled, ...
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2answers
1k views

Ok to use 2 port USB Power adapter?

I recently bought a RPi 3 but got a concern with its reliable operation in relation to the power source. A store near me has something like this but it has only two ports - http://www.amazon.in/...
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2answers
1k views

Can you mount/unmout hard drives that are powered and connected to the raspberry pi via a usb hub?

I want to setup a raspberry pi with two external hard drives for backup purposes. Because of the raspberry pi power limitation, i guess i will have to use a usb hub to power them up. My question is ...
0
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2answers
56 views

Regulate the voltage

For my project, I have this power supply which makes me an unregulated 5V power input. I'm willing to use it to power both my Pi and my 5V led strips. This power supply is rated at ±5%. I'm going to ...
0
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1answer
148 views

Is it ok to power rpi3 + high current usb device with battery pack and y cable?

I want to supply a rpi3 + a high-current (up to 450ma) usb device portably. Is it ok to get a battery pack with two usb outputs, attach the rpi3 to it, attach the data end of the y cable to the rpi3, ...
4
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1answer
16k 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 ...
0
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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
2k views

Raspberry Pi 3 stuck in rebooting after finishing the install

recently, i bought Raspberry Pi 3 and started to setup the stuff! first of all, i used laetest NOOBS OS and its just finished the install and after that stucked in Rebooting! then bought another SD ...
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3answers
2k views

Cannot mount an external EXT4 HDD

I have a 2TB 3.5" hard disk attached to a powered SATA to USB 3.0 adapter, which is connected to my Raspberry Pi 2. The Pi will boot with the drive attached and the drive will show up in fdisk -l, but ...
2
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1answer
1k 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 ...
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2answers
464 views

Have I destroyed USB power? Ethernet & USB devices powering on & off constantly unless keyboard connected

I have a rather strange problem. If I boot my Pi with only power, HDMI & and ethernet cable plugged in, the ethernet port and other USB devices will flash on (i.e. the ethernet lights and LEDs on ...
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0answers
49 views

Should I go for a power bank that has 5v output and 12 volt output

I have found this power bank ( http://www.amazon.in/Penibel-PT-10-10000mAh-Technology-smartphone/dp/B01FY58PLG?tag=googinhydr18418-21&tag=googinkenshoo-21&ascsubtag=2c2001f7-f9b7-4db1-9b28-...
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1answer
269 views

Raspberry Pi Zero 1.3 Audio pins

So I saw this awesome project Element 14 did with the Pi here https://www.element14.com/community/docs/DOC-79282/l/raspberry-pi-zero-retro-gaming-system I have a Pi Zero 1.3 and I want to do this ...
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1answer
2k views

How would one turn on his raspberry over HDMI

I've currently been experimenting a little with the embedded linux OS openelec (kodi). I tried to turn it into a full fledged media center which includes emulators and streaming etc. As you all know ...
2
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1answer
1k views

Rpi zero USB hub (not powered) for 3G dongle and USB to ethernet adaptor

Thinking to run a Rpi Zero USB hub without power for a Huawei internet stick and a USB to ethernet adaptor for SSH connection to laptop. Will the RPi zero be able to support these two devices at the ...
2
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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 ...
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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3answers
4k views

How much mA or A does the USB ports on the raspberry pi 3 supply?

I have just ordered a pi 3 and a 5" backpack display with a few other things but I'm either supplying too much power or not enough the display draws 500mA through a micro USB cable I've plugged the ...
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1answer
4k views

Max USB current on a Pi Zero V1.3

Whats the maximum current I get out of the USB port of the Pi Zero? I'd like to power USB Speakers (5V 3W). Is that possible?
4
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1answer
17k views

Can I power a Raspberry Pi 3 with a Smart TV's USB-Port?

We use a Raspberry Pi to display infos on a TV. The content is more or less HTML with some Animations. Currently we use a Pi2 and the power does not seem to be a problem. Recently we came up with the ...
3
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1answer
291 views

Switch power banks by temporarily attaching two of them

I'm having a hard time finding out, if it's possible to have two power banks attached to a pi. Is there something like an Y-cable or something? Use case is, that I'm planning on doing a timelapse ...
1
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0answers
1k views

Control USB power from Pi

I would like to control USB LED currently pluged into power socket from my Pi. I understand that it is not possible to simply switch ON/OFF given USB port on Pi. So is there some way, I could modify ...
3
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2answers
2k views

POE Switch to Power the PI?

Sorry if this a repeated, I couldnt find anything similar. Most threads seems to be modifying the PI or splitting Ethernet. Will this setup work for powering the PI? 1) Juniper EC-2200 POE Switch (...
3
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2answers
1k views

Control USB fan via relay

I've just bought a usb fan to cool down my router during the summer as it gets very hot. However, since i don't need to keep it on continuously, i was thinking about a solution to automate its usage ...
2
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1answer
4k views

Connecting a Behringer UM2/UMC22 audio interface

I'm looking for a not-so-expensive solution to get sound input into the Pi 3. As I'm a sound artist, this should have reasonable noise levels, and in the particular case I also want to amplify a ...
3
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3answers
828 views

How to power ten Raspberry Pi 3's?

Recently the company I work for has tasked me with a project, where we are purchasing 10 Raspberry Pi Model 3's to set them up for a lab within the office. Can anyone suggest a power source for ...
0
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1answer
48 views

Method to find raspi's usb current output

I am working on a project and I need to connect 4 mobile phones to raspberry pi (Pi-2). I need to charge phones as well. I know that raspi itself cannot charge 4 phones so I bought some usb hub with ...
1
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1answer
1k views

Connecting external Hard Drive to Raspberry Pi 2 [duplicate]

I am trying to connect a 2 Tb external Hard drive (ADATA HD710) to my raspberry pi, but the problem is that when I connect it to one of the USB ports, the raspberry pi stops working. I am not sure if ...
2
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2answers
780 views

USB HDD on Raspberry Pi 2 Model B? [duplicate]

I have a Raspberry Pi 2 Model B and a 2,5 inch HDD that I want to connect via USB. The HDD also powers itself over USB. Does the Raspberry Pi 2 Model B provide enough power? Can I safely run the HDD ...
0
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0answers
60 views

max_usb_current uneffective?

I found out that my raspberry freezes when having connected Huawei E3131 USB dongle... and the signal is really low. At first I thought that it may be connected to max current from USB... as specs say ...
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2answers
3k views

Can I power a RPi3 from its USB ports?

https://www.raspberrypi.org/help/faqs/#powerHub indicates that certain USB hubs can "backpower" the the Raspberry Pi by its USB ports. Apart from the fact that it seems to bypass the overvoltage ...
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2answers
675 views

Increase current output at USB for Raspberry Pi 2

I have a self made Isolation Board which consists of 2 Relay Switches and provides a kind switching function to cut off the power supplied to a Sensor Device on the other side of this Board. The ...
0
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1answer
524 views

Blinking PWR when not enough current available?

I'm not sure whether I've seen mention of this here before or not. Anyway, I have a B+ with max_usb_current=1 enabled so I can run an external USB drive off it. There's never been a problem with ...
1
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1answer
1k views

Amazon Basics USB Hub, disable Backpower? [closed]

I've got the same issue as this question. My Raspberry Pi 3 will not power up when powered from a powered port on the same Amazon Basics Hub AND plugged into the 'USB In' on the Hub. The linked ...
0
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2answers
119 views

Pi power from a PC? [duplicate]

Given the type of USB port that the Raspberry Pi 2's DC input has, is it possible to just plug the Pi into a powered device with USB ports (such as a PC) and power it from that device?. Thought it'd ...
0
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3answers
3k views

USB Hub to power 8 Pis

Would this USB hub work to power 8 Pi 3's? If not... What are clean powering options for a cluster of 8?
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2answers
168 views

Looking for a simple RaspberryPi keyboard with USB hub to connect mouse to [closed]

I have a RaspberryPi model B with 2 USB ports and I would like to connect 3 devices: Keyboard Mouse USB Flash Disk I would like to do this without using extra USB powered hub. Is there any low-...
4
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3answers
6k views

USB ports stop working after a week, needs restart

I am working on a project that involves Raspberry Pis which run 24/7, periodically fetch data from a server and display it on a screen. We have a problem with the USB ports - they appear to stop ...

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