Questions tagged [power-supply]

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

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572 views

Are there USB powered speakers with an Analog port? [closed]

I have built a raspberry Pi Jukebox, specially modified for a handicapped user (voice feedback on all songs, large buttons) but I have one.... last.... problem. The speakers I used ran off the analog ...
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4answers
287 views

Will my Pi will be fine if I use those el cheapo chinese power adapters? [duplicate]

Title says all. does these cheap power adapters can harm my Pi anyway? and also, lets say these things stop providing less than what required (less than 5v and less than 0.7A), what will happen to my ...
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1answer
259 views

Felt current on my Pi, could this have damaged it?

Here is what happened. I have a Belkin Surge Protector. I have connected my iPhone charger (5v 1A) to this and it powers my Pi. I have also connected powered USB hub, transcend hub3k to this surge ...
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1answer
9k views

Is SD card corruption still an issue? [closed]

For a project I'm using a 16GB class 10 Sandisk micro SD card (in an Adafruit micro SD card adaptor). I've got a Model B Raspberry Pi that's not overclocked, nor has it ever been. Since I'm running it ...
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Is there any point to a 2.0A (or greater) power supply, given the 1.1A polyfuse?

My question: it's my understanding, based on the official Raspberry Pi FAQ, the wiki, and numerous forum threads on Stackexchange and elsewhere, that the Raspberry Pi has a 1.1A polyfuse on the micro-...
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1answer
323 views

RPI is rebooting every time I plug in the wireless device?

I encounter a very annoying problem with My Raspberry Pi which is rebooting whenever I plug into it a Wireless USB adapter or an ethernet adapter.
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1answer
371 views

Raspberry Pi won't boot up

When turned on, the TV just says "HDMI 3". My power light is stable (red), and the "ACT" light flashes 4 times, then pauses the 4 times... It says the start.elf is not launched, but I can't find a way ...
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1answer
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Hard drive not detected by the Pi

My raspberry pi is unable to detect my external hard drive, I'm wondering if I might have messed up in my setup. The hub is connected to the pi in two ways: from the hub to the pi's microusb to give ...
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1answer
151 views

Make Pi poweroff secure?

I made a little device that solves a specific task. It gets turned on and off by powering it up and down. Now I had a corrupted file system for the first time. That's why I'm thinking about a strategy ...
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1answer
1k views

Raspberry PI freezing

I am working on a project to getting data from serial device and transmit it to web. I am using kernel 3.2.27 with busybox few start up scripts like sysfs and proc, wvdial daemon to dial USB modem for ...
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1answer
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Using a Raspberry Pi to manage a bank of several hard drives

I am looking to use a Raspberry Pi as a home file server. I have several hard drives, a Raspberry Pi, an unused computer case, and files that I need to store. I would like to mount all of my hard ...
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3answers
289 views

Peripheral power from battery

I'm having trouble powering my pi from 12v 2a battery. I made a circuit using 1117 linear regulator, it's supposed to give 1a current and 5v. Pi powers on normally but any peripherals that I connect ...
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Can I use a 5V battery as a UPS?

I have a few backup battery for my mobiles phones. Can I use one of them as a UPS? +--------------+ 5V | | +--------+ from ---> 5V backup | 5V | | ...
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2answers
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Trying to connect a Raspberry Pi and Water Pump with one power source

I am trying to find a way to split one power supply between a raspberry pi and a water pump. This is pretty much exactly what I want to do. http://arpi.valtio.org/files/2013/10/IMG_0891.jpg Notice ...
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Alternative ways of attaching power to a RPi

I found a nice metal case to house a Raspberry Pi for a project. It has near-perfect dimensions and properties, but it lacks space to attach a power supply via Micro USB. I think the main USB ports ...
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1answer
416 views

Power off the “bad way” [duplicate]

My RPi will be used at home (as a Wifi radio unit), without any screen / keyboard / mouse, etc. So very often, me, wife or kids will turn it off by just unplugging the power unit. Will this be a ...
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Raspberry Pi restarts after connecting 2TB WD My Passport

When I connect my 2TB WD My Passport external USB 3.0 hard drive, Raspberry Pi reboots and fdisk -l does not list the hard drive. I think so there is some problem with my power adaptor, what should ...
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2answers
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Power Management System for Raspberry Pi

I am working on a concept idea at the moment that I would like to take forward later in the form of wearable computers. At the moment, I am using a Raspberry Pi as the computer itself. It presently ...
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2answers
664 views

Where is my RPi losing power?

I've tried 5 different chargers, and none of them gets TP1>TP2 over 4.6 volts. I just plugged in a new charger (found here) which gives it 4.4 volts with only SD card attached, but 4.8 with SD card ...
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RPi shutting down after powered from 5V pin

My RPi is working fine and automatically connecting to wifi when powered from USB but when I try to power it from a regulated 5V supply on the extension headers I can see that it goes on but then ...
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1answer
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Time machine over wifi: What hard drives do not give “failed verification” issues?

I have installed netatalk and set up my Time machine to backup via wifi on an USB hard drive wired to my RPi (followed these instructions). Nevertheless I repeatedly have "failed verification" issues ...
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1k views

Make RPi keep an semi-accurate time after power loss

I use Motion detection and a webcam as a security camera. It's headless with no internet or keyboard. To turn the camera off while it's not need I just turn the power supply off. Because I shut it ...
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5answers
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Power RPi from same Powered USB hub as its Peripherals?

I am putting together all the bits I need to start playing with my Pi, and one question I have is how to power it using the least cables as possible. Given that I have ordered a small mains powered ...
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2answers
520 views

Harddrive detected as 13fd:160e Initio Corporation instead of 1058:1010 Western Digital

I have the following configuration: A Raspberry Pi model B connected to a powered USB hub, with the +5V detached from it (otherwise the hub powers the Pi due to backfeed). They work fine together and ...
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1answer
414 views

Why does my raspberry failt to boot with a wii nunchuck connected

I have connected 3 different official nunchucks to my raspberry the following way; pin 1: 3.3v, pin 3: SDA, pin 5: SLC, pin 6: GND I tried several power supplies including a 230 watt pc psu but every ...
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1answer
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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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2answers
3k views

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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515 views

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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1answer
2k views

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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2answers
10k views

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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3answers
3k views

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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3answers
469 views

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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2answers
6k views

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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1answer
3k views

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
2k views

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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2answers
87 views

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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2answers
248 views

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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3answers
16k views

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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1answer
2k views

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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4answers
8k views

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 ...
5
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1answer
3k views

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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2answers
2k views

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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1answer
1k views

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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2answers
1k views

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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2answers
4k views

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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3answers
2k views

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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2answers
4k views

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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0answers
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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 ...