Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

Questions tagged [usb-power]

Relates to powering USB devices from the Raspberry Pi

See this answer for a detailed discussion on the USB power draw capabilities:

How much power can be provided through USB?

371 questions
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How much energy does the Raspberry Pi consume in a day?

My searching efforts have failed when trying to find this. On average, how much energy does the Raspberry Pi consume in 24 hours (minimal usage vs. max usage in a day and USB vs. Micro-USB powered)?
Zero
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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?
Milliways
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How much power can be provided through USB?

I know that my USB powered Hard Drive doesn't work, but what is the minimum power requirement that the Raspberry Pi can fulfil for devices that connect via USB?
Jivings
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Is setting `max_usb_current=1` to give more power to USB devices a bad idea?

I've been searching around for more information on the /boot/config.txt configuration directive max_usb_current, trying to find out exactly what happens when that is set to 1, but it's hard to find any official documentation. I know the…
geerlingguy
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USB Cables... Why are some of them bad for Raspberry Pi?

Yesterday I bought another Raspberry Pi, and installed Rasplex on it. While using Rasplex, I got this colored square on the top-right corner, indicating that the power supplied to my Raspberry Pi is not sufficient, although I was using an Anker…
The Quantum Physicist
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6 answers

Choosing a Pi4 power supply

I'm trying to decide what is the best option for powering a Pi4. The specs mention for a minimum of 3A. Let's consider we would also like to connect a 2.5" drive to the Pi4. Could someone more experienced with power supplies help me with the…
m000
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Can the Raspberry Pi power this 2.5" drive without a USB hub?

I want to use my Raspberry Pi model B as a NAS, but I'd like to avoid using a USB hub. I have a 2.5" Western Digital 1 TB USB hard disk drive (this one), and a 2 A power supply for the Raspberry Pi that I'm planning on using with it. Will this work?…
vkjb38sjhbv98h4jgvx98hah3fef
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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
Pierre Spring
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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: is there any way I can cut the power coming from…
opc0de
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Powering from my PC's USB 3.0 port

The specs for my PC's motherboard don't mention any upper or lower limit for its built-in USB 3.0 ports. What is the minimum current that any (standards compliant) built-in USB 3.0 port should be able to provide? Is a USB 3.0 port suitable for…
Highly Irregular
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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 appear to stick. Any ideas how to fix this?
Andy Smith
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Long (30 to 50 foot) USB power only cable

I want to place my Raspberry Pi in a remote location to act as a surveillance camera and need to run a power-ONLY USB cable over a long distance of 30 to 50 feet. Can I safely extend a normal USB 2.0 cable by just connecting the VBUS +5V RED and…
HeatfanJohn
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Powering Raspberry Pi and other USB devices through a single USB Hub

I bought a powered 7-port USB Hub, which has 7 downstream ports, 1 up stream port and one power port. My question is can I connect both Raspberry Pi and the USB devices that I want to use with Raspberry Pi and power them through the sample USB Hub…
Sudar
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Can I provide separate power to USB device?

I have a USB device that requires more power than the RPi can provide. I don't want to use a powered hub. Couldn't I build a simple adapter that passes only the data lines and breaks out Vcc and ground to the device (no connection to RPi) such that…
CPRitter
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Can you transfer data through the microUSB?

The Raspberry Pi A & B are powered through the microUSB port. If the Raspberry Pi is plugged into a computer instead of a power transformer, could you send data through that connection? I know iPhones and iPods have a similar approach where you can…
cspirou
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