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Questions tagged [usb-power]

Relates to powering USB devices from the Raspberry Pi

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22 views

POE power for BOTH Pi and Hard Drives?

I have a need for some network-accessable storage for backups, in a location where there is only POE power. There is no mains AC electricity available. Ideally I'd like 2TB of space so an SSD is ...
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26 views

Connecting Raspberry Pi to old found TFT display

I have an old car DVD player sitting around that has a fairly decent secondary TFT LCD screen (hannstar 721h440b19-a1) that I thought I could use with my Raspberry Pi 3 Model B. I opened up the unit,...
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1answer
57 views

Is it safe to power my external hard drive with a Raspberry Pi 3 B+ USB port?

I have a external hard drive that has written on it "5V ⎓ 1A". Both power and data transfer happen over a single USB. I have been reading about powering this hard drive with the USB ports on my ...
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2answers
123 views

Car Powered Raspberry Pi: Safe Shutdown and Power On

Apologies if this is a duplicate, but I can't seem to find a suitable solution. I need to power a Raspberry Pi in a car, and for obvious reasons need to shutdown gracefully, however, I need it to ...
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1answer
53 views

Using a molex powered usb panel to power multiple pi's

I have been looking into multiple ways to power numerous rapsberry pi's from one power source. I am not an electrical engineer and as such some methods I have researched online are less than ideal, ...
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2answers
53 views

Choosing a USB hub

I've read that using self-powered USB hubs with Raspberry Pi tends to be problematic. My first discovery today is that I will prevent some problem buying a USB-2 hub. My second concern is to power on ...
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1answer
38 views

PL2303 USB: Why connect the red wire +5V?

An instruction video at T=2:12shows the red +5V source connected to the rPi. In what scenario would one want to do this? I ask because I would expect the rPi to have it own power supply (in ...
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2answers
184 views

Raspberry Pi SD in RAID1 with a USB-Stick

I am using my raspi for my smart home monitoring and I don't want any system crashes because the SD card fails. So is there a way to build a raid 1 with the SD card + an additional USB stick (or maybe ...
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2answers
447 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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1answer
87 views

Is it okay to power the Pi Touchscreen by plugging into the Pi?

I have the official raspberry Pi 7 inch touch screen, and I have mounted to it a Pi 2. Lately I have been using it and I have been plugging the power into the Pi itself. I however recently remember ...
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2answers
108 views

Power rpi with 2 ports from usb hub

Ok so I have not been able to find this specific question on the interwebs. I am looking for a USB hub that will power the pi and a few other things. I'm not concerned about the over all power rating ...
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0answers
17 views

USB Dongles worked on first boot okay but after restart it stopped working

I have a Raspberry Pi 3 Model B flashed with Raspbian by Etcher.io. When I booted it for the first time , I was playing some YouTube videos and it worked fine with keyboard and mouse. However, after ...
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1answer
3k views

USB Boot From SSD not booting — Rapsberry Pi 3b+

So I'm having issues getting the USB boot mode working on my new raspberry pi 3b+ and a couple of different SSD's I'll first go through all the things that I've done, and what I'm seeing. Installed ...
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0answers
41 views

Power AND Data on a SINGLE port with Adafruit PowerBoost 1000

I would like to be able to power my Raspberry Pi with the Adafruit PowerBoost Charger1000 and use USB data while exposing only a single USB port on my device. One idea I had was to simply split a USB ...
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1answer
64 views

Missing L4 chip near HDMI port, not boot up and usb port no power output

My rpi work perfectly until I touch it, It not boot up then I found the L4 chip HDMI port is missing(I have touched HDMI port I think my fingernail pull it off...). I found that tiny chip in the box ...
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0answers
30 views

USB Communication Failure

This may not be specific enough to rpi (as it could also be a problem with the microcontroller), we will see what you think. I have two USB devices connected to an rpi Zero(through un-powered hub). ...
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4answers
420 views

Dual power supply for Raspberry Pi 3

I am using a Raspberry Pi 3 B+. Now I want to power up my Pi through GPIO pin 2 or 4 using a LM2576, and it should also work with USB power supply from adapter. I want to know which supply is ...
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2answers
3k views

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

I've 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 ...
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0answers
44 views

Raspberry Pi HDMI blacking out and keyboard,mouse freezing

My setup consist a Raspberry Pi 3 model B running raspbian jessie. It is powered through GPIO header by a 5V, 5A switching regulator. I had a HDMI monitor, a flash drive and a USB hub connected with a ...
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1answer
439 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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4answers
106 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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0answers
104 views

Pi3 + Waveshare touchscreen not work on start

i have a waveshare 7inch revices with rev.2.1. On the start i cant use the touchscreen. The touchscreen works only with the following steps: after the start unplug and plug the usb. What can i do ?
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1answer
127 views

usb to eth adapter hot-plug on pi zero w causes reset

RPi zero w v1.3 running RASPBIAN LITE stretch I would like to use an ETH adapter to connect to the pi, but if I plug it before starting the system all works fine, while in case of hot-plug it causes ...
2
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1answer
609 views

Powering Raspberry Pi Zero when USB OTG is in device mode

I'm using a Raspberry Pi Zero as a USB device, i.e. it is connected and powered via the OTG USB port to a USB host (in this case another Raspberry Pi, but it could be a PC or any other USB host): ...
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1answer
4k 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
197 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
788 views

No effect when I set 'max_usb_current' in /boot/config.txt on a Raspberry Pi 3

I want recharge my iPhone from my Pi 3 Model B's USB port. In /boot/config.txt, I have set max_usb_current=1 This does not seem to have an effect any more. Why is this?
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3answers
364 views

How to halt Pi without turning off USB?

How do you safely shutdown or halt the Pi without turning off USB power? I have an application where an Arduino is connected to a Pi via USB. The Arduino manages a battery that powers both it and the ...
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1answer
37 views

Raspberry Turning on without really powering up. How?

My raspberry pi was trying to turn itself on without really powering up by USB cable. Although I am giving 12 volts to L298N shield from battery. I am making wireless RC car. When I give 5 volts from ...
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1answer
122 views

Pi b+ power issues?

I have a raspberry pi b+ with raspbian stretch. My power adapter is rated at 5v 1.5 amp. I have a monitor and network cable connected, USB keyboard, USB mouse and 2 USB cameras connected via the 4 USB ...
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1answer
81 views

Torrentbox Hard Drive keeps unmounting when copying files. How to avoid it?

My external hard drive is connected to a powered usb hub (5v 3000mA) then connected to rpi3. Whenever I copy any file that would take more than 30 sec, it would unmount and I have to mount the next ...
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3answers
304 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 ...
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1answer
59 views

Can I get both power and data from an external drive with an integrated USB hub?

I want to connect a power-hungry external drive to my Raspberry Pi 3. Normally this would mean separate external power supplies for the Pi and the external drive, or else plugging both the drive and ...
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1answer
50 views

Boot only with usb cable energy

My raspberry worked fine with a 5V-2A charger. From few days, It boots only with the energy coming from the USB cable from my computer. If I use the usual charger, it goes in a boot loop, displaying ...
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2answers
301 views

Is it possible to prevent the Pi from receiving power from a powered USB hub?

I have a Raspberry Pi 3 with an On/Off Shim from Pimoroni. If you're not familiar: it's basically a little device that gets soldered onto the first 12 GPIO pins and allows you to use a built-in (or ...
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1answer
562 views

Will my pi run on a 5v 1A/2.1A MAX power bank?

I have a SoundLogic solar-powered power bank which has a 5v @ 1A/2.1A MAX output, is it safe to use it with my pi 3? Im kinda worried about using it and it frying or breaking when the battery energy ...
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1answer
2k views

Powering Raspberry PI With Broken Micro USB Connector

The Micro-USB port has been brutally ripped off from the PCB on my Raspberry Pi along with traces connecting it. I know that I can power the device from GPIO 5V and GND, but there will be no ...
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3answers
775 views

Will a power bank short circuit a raspberry pi?

I was wondering if I could make my raspberry pi portable with a power bank however, I think it might short circuit the motherboard and then that would mean bye bye raspberry pi. Is it save to use my ...
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2answers
617 views

Two power supplies for RasPi and SSD. Does it work?

I'm planning to connect some old SSD what I've already to my RasPi3B. I ordered cheap SATA-USB adapter cable from ebay. It has two USB-a plugs, one is for data and power another is only for power. ...
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1answer
371 views

Arduino powered by rpi3

I hooked my Arduino UNO to one of the USB port of my rpi3. The Arduino itself power a small light sensor, later on i plan on adding LCD display, LEDs, etc Can the pi handle it without any fuss ? My ...
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3answers
636 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, ...
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0answers
70 views

Accidentally fed 12V to the 5V-pin of Rpi2 [duplicate]

After it happened, smoke comes out near the micro USB port of the rpi. I replugged the power supply of he rpi but this time, the power LED(red) doesn't turn ON while the green LED keeps on blinking. ...
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1answer
49 views

Use USB as power only, no filesystem access on external device

I have a USB powered dash-cam that runs off a normal cigarette lighter for its power. I have a use for my car to run a raspberry pi and I wanted to use the pi to power this camera. I have written ...
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2answers
1k views

Using a quickcharge power brick to run a Pi 3

I usually use my phone power brick (rated at 5v 2.5Amps) to run my Pi 3 and it works fine for the most part. Now I bought a new phone which supports something called fast charge. So the power brick ...
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1answer
317 views

Raspberry Pi Zero usb port not working and no network access

I have a Raspberry Pi Zero V1.3. I recently tried making a portable device running Retropie. I attached a TFT-screen using the ports on GPIO. After a while I was trying to install modules for the ...
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2answers
136 views

How much power can I draw from the USB ports on a Raspberry Pi 3?

I am attaching my Pi 3 to two delicate sensors via USB. My question is, if i was to take the power cords from the sensors and attach them to a male USB cord. The problem is, anything more than 5.5V ...
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1answer
65 views

Pi Model 1A won't connect to my router via Ethernet cable

I have an old Raspberry Pi 1 Model A that I am trying to fire up for the first time. I followed the Ethernet Gadget tutorial exactly: I inserted an SD card into my laptop (MacBook Pro) I used Etcher ...
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1answer
35 views

How to power an RPi Model 1A with my Mac?

I have a MacBook Pro and a Raspberry Pi 1 Model A. I'm just trying to power the RPi (I need a power source). I've searched hi and low, and the best/easiest solution seems to be finding a USB A male-to-...
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1answer
73 views

Can a smartphone acts as a power supply to a Model 1A?

I have the following USB MicroB-to-A cable that I use for charging my phone (Samsung Galaxy S7 Edge): I'm wondering if I can power my Raspberry Pi 1 Model A with my phone?! The USB-MicroB end would ...
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2answers
266 views

Is it safe to switch off power to the Pi? [duplicate]

I'm planning on using 20+ R Pi Model B+ to run animated videos on 20+ PC screens, for an exhibition. I'm using Pi Video Looper, which runs on start up, and detects movies on a USB stick. I would like ...