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Questions tagged [power-supply]

The methods for powering the Raspberry Pi (typically via its micro-USB connection.)

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Problem with an USB extension cable powering a HDD

I have a 2.5" HDD with two wires, one for USB data and another for USB power. It works perfectly if I connect the USB power cable to the power. Now, I need to move the raspberry pi and the HDD, so I ...
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Raspberry PI freezes

I am running my Pi with an Iphone charger( 5V ~1A). It was running quite well and no hangups or anything. I was mostly using ssh to use it. Recently, I hooked up and ADC(MCP3202) to connect a sensor ...
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My Raspberry Pi is turning off after about 3 minutes. Any ideas?

I've tried using different cables, different cards, power supplies, different HDMI cables even ... but my Raspberry Pi just shuts down after about 2~3 minutes. I tried with different power supplys (...
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DC-DC Converter for Raspberry PI powered by 12 volt automotive power

I have a basic understanding of electrical systems and want to verify my findings before I commit to buying the component or frying my hardware. The power supply: Product & Manual.pdf Currently ...
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How many volts can you safely connect to the Pi?

I want to purchase this power supply (battery pack) for mobile projects (I know, it isn't a lot of power), and I was wondering if, with a bit of modding, like adding a micro usb tip to the power or by ...
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How to supply redundant power to a Raspberry Pi from two PC usb ports?

I would like to add a Raspberry Pi to an existing two-node server setup to get an utility / playing / monitoring linux system independent from the two PCs, but I can not actually consume another mains ...
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Make a portable device based on Raspberry Pi

I would like to use RP to create a portable Unix device, something like Nintendo DS. Has anybody have information about the monitor and the power I need to use to make RP as a portable device?
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Highest current raspberry pi can take from usb

I'm going to be working on a project from a DC power supply, and I need to know the maximum current the Raspberry Pi can handle from the USB port. I know my wall wart adapter that came with my Pi ...
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Problem with grounding

I have a little problem with grounding. I realized a circuit which is controlled by the GPIO-Pins of the Raspberry. The function of my circuit is irrelevant. You just have to know that I need the 3....
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1answer
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RPi: Handling large quantities of amperes

I have read on the Raspberry Pi Foundation's website and forum that RPi Model B rev 2 should not get more than 1200mA of power on a 5V power source. This post (Safe to power a raspberry pi from a 50W ...
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RPi Accepted Waveforms from power source

As we all know, electricity moves as waves. There are different types of waves (http://en.wikipedia.org/wiki/Waveform). Different power supplies send electricity in different forms. For instance, some ...
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Homebrew Power Supply for Raspberry Pi

I was wondering what precautions I should be taking when I am making a PSU. I managed to find an old dc adapter. These are the parts I currently have. | no | name | specs | |---...
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Use same power adapter for RPi and USB Hub (For bundling)

I am planning to bundle RPi along with a additional USB ports which has enough power to be used with External HDD. But I don't want the user to use two adapter. I want both to run from one. What ...
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Will a 2.1 Amp MicroUSB charger be OK for the RPi?

I know the RPi needs a 700 mA MicroUSB charger, but can it handle a greater amp, namely 2.1amp?
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Waterproof solar battery enclosure for my Pi?

There are numerous topics out there about powering Raspis from batteries or from solar or just making a waterproof enclosure... But I'm a programmer, not an electrician. I would end up plugging the ...
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Can the keyboard draw too much power and cause damage?

I've been using a small, lightweight keyboard, fearful that one using a higher voltage would damage my Pi. Could I have invested in a better keyboard or did I do the right thing to prevent damage?
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Powered hubs, backfeeding and safety

I've got my RPi set up as a media centre, running Raspbmc, using a powered hub to run a bunch of peripherals including terabyte external HD and a hacked-together IR remote. All very nice, but it's ...
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Where to measure the DC voltage in RPi?

I have got a power source for my RPi. The manufacturer claims that the output voltage is exactly 5V. However, I would like to measure whether it is true, and I would like to find out how stable it is ...
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RPi rev 2 and USB powered harddrive

I am getting my RasperryPi Rev2 soon, and I plan to use it as a media centre. I have a WesternDigital Elements 1TB USB3 2.5" USB powered external harddrive. I know that a normal USB port outputs 500mA,...
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Power issues with 2 external hard drives connected

I'm using the B model pi which has two usb ports. I originally had 1 1TB external usb hard drive connected to it and then tried to add another 1TB drive and it seemed like that one would not power ...
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Safe to power a raspberry pi from a 50W adapter

I have a power adapter that is rated at 50W (5V, 10A output), and I was wondering if it would be safe to run a single pi from it? I am planning on using it for powering more in the future, but would ...
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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 ...
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Raspberry Pi power source supply

I read that the current should be at least 700mA. can I use HTC Google Nexus One charger as my Raspberry Pi power source supply ?
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one power supply for raspberry pi and external HDD

I have my Pi and a USB powered external hard disk. I am looking for a way just to have one plug for the both of them. At the moment my Kindle Charger doesn't have adequate power to power them both. ...
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Would a Compaq Presario V6000 laptop monitor be just fine for the RPi? [duplicate]

Possible Duplicate: Connect Pi to an old laptop screen My Compaq Presario V6000 laptop just had an HDD failure and I took it apart and salvaged the monitor. I was wondering if I could use the ...
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What is the quality of the 5V supply on the GPIO

I measured on the 5V pin to the ground and got stunned over the variance that I saw. First I had a Powered USB hub where my devices where attach and so the Raspberry. I just decided to remove my main ...
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Dual Power Supplies (Redundant/Spare/Backup)

I have two separate power feeds presented as either two IEC C13 or two UK 3 Pin sockets (the choice is mine). I would like to connect my Pi to both power feeds so that if one power feed fails, the Pi ...
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3answers
10k views

Maximum amperage on power supply? [duplicate]

Possible Duplicate: Can I feed the device with a current higher than 1A? I've checked the RS and Element14 power supplies: 5V 1A. I've read a few posts here on power supplies and seen people use ...
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Fixing issues with Powered USB Hub

With my PI I'm trying to use the F4U018 Belkin 7 port hub (yes - the one on the problem list). Its one of three I have around, all of which happen to be on the problem list - I don't want to shell out ...
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1answer
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When connecting to ethernet it's shutting down/crashing

A few days ago I connected my Raspberry Pi to my screen and I did some work directly on it (without GUI, thus only command line) and suddenly it crashed / shutdown. The red light is on all the time. ...
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758 views

Does a two-port charger at 1.5A provide 750mA from each port?

So, I'm looking to buy this energizer charger: http://www.amazon.com/Energizer-Dual-Universal-Charger-Pc2-wa/dp/B004YZI1VW/ref=cm_cr_pr_product_top The 1 port product has 1A the two port product has ...
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Powered USB hub powering the Pi through USB sockets (not microusb)

I bought a powered USB hub from Maplin, just something cheap, but the guy assured me that it would work fine. Anyway, plugging it into the raspberry pi (with the microusb power lead out of the rPi) ...
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1answer
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If I power my Pi from GPIO, can I detect that it's not being powered by USB?

I'd like to create a backup power solution for my Raspberry Pi, and I'd like a notification to come up that the Raspberry Pi is running on this backup power. This notification has to tell me that ...
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138 views

Can I leave my Raspberry Pi turned on all the time? [duplicate]

Possible Duplicate: Is it suitable for running continuously, 24/7? I want to maximize the life of my Raspberry Pi, should I try to turn it off when I can or is it ok to just leave it running all ...
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Is there any reason why a powered USB hub that provides 700mA couldn't power a RP? [duplicate]

Possible Duplicate: Powering from a non-dedicated power source The Quick Start Guide says: Micro USB power supply – make sure you use a good quality one, capable of providing at least 700mA ...