Power is the ability to supply a device with energy. This question covers how to power the Pi, ways to do it, and the safe ranges of power.

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2
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3answers
50 views

Is it possible to wirelessly turn the raspberry pi on/off?

I thought about getting a RPi 2 B and install Retropie to relive my childhood and play some oldschool games with my girlfriend(she really loves the idea). Right now I don't have a RPi, but I got 2 ...
2
votes
1answer
58 views

Power on display results in blank screen

I'm currently trying to write a simple script that turns on and off my monitor connected to the rpi via hdmi-to-dvi cable. I can turn off the monitor without issue using: tvservice -o However when ...
2
votes
1answer
64 views

Controlling 12volt off road LED lights with Raspberry Pi B and touchscreen

Once the LED Off-Road lights are installed on my vehicle, I would like to use a Raspberry Pi model B or B+ and a touch screen to control the different lights and functions. Each light has both a ...
2
votes
1answer
68 views

What does it mean if both LEDs are lit up?

I recently got a RPi and when I plug it in both LEDs light up solid without flickering. It also does not show up on the monitor. Everywhere I've looked it says they should be flashing but they aren't. ...
0
votes
0answers
23 views

Raspberry Pi (compute module) stopped turning on (no LED's turning on either)

I have been using a raspberry pi all morning, and now suddenly when I plug in the power supply which is 12V, no LED's turn on, and the board does not power on. How do I fix this?
0
votes
1answer
22 views

Choosing the right converter

I'm having trouble calculating the right converter to buy in order to power a Raspberry 2 from batteries. I'm using 6 batteries (6x1.5V) so I guess I'll need to get an UBEC Converter like this one. ...
0
votes
1answer
68 views

Raspberry Pi 2 - HDMI not displaying

Just recently purchased a Raspberry Pi 2 Model B 1GB. I also bought a micro SD card Kingston 16GB Class 10. I loaded up the Noobs software as instructed on: ...
1
vote
1answer
331 views

Are there alternatives way of power a Raspberry Pi 2 except the microUSB connector?

The Arduino can be powered via USB, power jack or VIN/GND pins. Does the Raspberry PI 2 offer options for power other than the microUSB connector ?
1
vote
1answer
24 views

Stability when taking power from Raspberry

[Disclaimer This is not a question about WOL] I have a simple setup where I would like to use the Raspberry as a wake on lan unit. I use the Raspberry to stream the mac addresses of the relevant PC ...
2
votes
0answers
27 views

Determining correct J3 jumper setting on Compute Module IO Board

The Raspberry Pi Compute Module Development Kit Quick Start Guide says that prior to using the kit, the IO bank voltage jumpers (which power the GPIO banks) should be checked. However, I can find no ...
5
votes
2answers
300 views

Is it correct to power the Raspberry Pi this way?

I have an embedded Raspberry Pi in an enclosure, with a micro-USB female socket (see middle picture) for power input. Is it correct to power the Raspberry Pi like this (micro-USB socket VCC to GPIO ...
1
vote
1answer
159 views

Raspberry Pi 2 max USB current

I'd like to power an RPLiDAR (5V @ 230mA) and a Pixy CMU Cam5 (5V @ 120mA) Is this possible I can give it a 5V 4A powersupply if necessary. Will this burn out the Pi over time?
0
votes
1answer
114 views

Raspberry Pi does not start

I have a Raspberry Pi 2 Model B v1.1 + Raspbian 3.18 Debian Wheezy inside. Everytime I plug in the power, it requires a CTRL+ALT+DEL to boot, and the screen stays inactive (no signal). After the ...
1
vote
1answer
46 views

Problem when trying to get a DC motor to run using the L298N H-Bridge?

My setup is as follows: Using this motor controller board, I have one DC motor (I'm new to electronics, so I'm not sure when I say it's rated at 1.5V, because one 1.5V AA battery on its own makes it ...
0
votes
1answer
160 views

Advice on Using the Pi2 as a NAS vs NAS device with Pi2 attached

I want to build a home NAS and with my Raspberry Pi 2 and also have XBMC installed on it and need some advice on the route to go. The storage will be used to stream movies from (via XMBC) and also to ...
0
votes
1answer
23 views

can't make my RPI booting

i m a manupilating RPI B+ for the first time excuse me for my language i m Tunisian and i m having problem with making my RPI works headless ,the first one is i m using win32diskimager to write ...
0
votes
1answer
159 views

Pi / Pi 2 using modern 'smart' USB Power Adapters to supply power to the Raspberry?

Once upon a time there was only one way to charge a usb device and that was done at 5V and 500mA max, or so I've been told. 'Modern' USB Power Adapters like the Apple 1Amp, 2Amp and 2.4Amp and many ...
1
vote
2answers
77 views

what if my charger output is 5V 750mA for pi 2?

By the RASPBERRY PI 2 MODEL B specs: http://en.wikipedia.org/wiki/Raspberry_Pi The power rate of it is 800 mA, what are the possible effects if the charger output is lower or higher than 800 mA?
1
vote
1answer
129 views

Raspberry pi 2 shuts down when TV does

I had a rPi Model B for a long time... and now I got an rPi2 but I am having a small problem with it. I had the same problem with the 1st pi but I dont remember what I did to fix it. Sometimes it goes ...
0
votes
1answer
50 views

I have just searched for a usb Y cable to power my HDD from another power source but also transfer data to my Raspberry Pi

So here the Y cable I'm thinking of buying it's to connect my Western digital Elements HDD to a different power-source rather than using the Raspberry Pi as an only usb power but also using the other ...
1
vote
1answer
67 views

Pi 2 odd behavior of power system

My Pi 2 sometimes does not power on properly -- just the red LED comes on and there is no further activity. I've done this a bunch of times and there is a consistent pattern. If it happens with no ...
1
vote
4answers
80 views

Can you use a Raspberry Pi to write code that powers an onboard LED or motor or fan? [closed]

In other words, is it possible to solder on an LED or a fan or a motor (perhaps even a custom-made piece of hardware) and then write software that can send power from a battery to the added device? ...
0
votes
1answer
99 views

Can you back power the RPi2B? [duplicate]

I was wondering if the Raspberry 2 Model B can be back powered. From what I see here it should be possible. But in various other places it's been said that for the B+ it isn't possible and the 2B ...
2
votes
3answers
210 views

Load limit of Raspberry Pi 2

After connecting Android phone to Pi 2 though USB the red and green light are very low. Does Pi 2 have any energy load limit?
1
vote
2answers
104 views

Pi2 won't start when connected to breadboard via ribbon cable and gpio-to-breadboard interface

I have a Raspberry Pi 2 that works great until I try connecting a breadboard to it via a 40-pin ribbon cable and GPIO-to-breadboard interface board. Whenever the board is connected to the pi, the pi ...
1
vote
2answers
89 views

Safest way to switch off uncleanly

Assuming that I do not have keyboard or ssh access to my Pi, but I do have physical access. What is the safest way to power it off and preserve the SD card? (This is the case if I've just done a ...
1
vote
2answers
108 views

Power led randomly blinking every 1 minute on b+

I've just bought my rpi b+. Power supply for raspberry is 4.94V (which is in appropriate 4.75-5.25Vrange). Raspberry pi working good, but there is one possible trouble. I don't know why, but power ...
4
votes
5answers
126 views

USB power cycling problem

I am using a USB 3G stick on a RPI B+ (3.18.7+) to ftp measurements from a sensor platform. To limit RF interference, and save power, I am turning it on and off a lot (which on the B+ is now possible, ...
0
votes
1answer
111 views

XBMC Sleep Mode

I've been looking to get a Pi as an easy way to setup a TV box for my living room. I'd like to set up XBMC and be able to put it to sleep when not in use. I've found the Sleepy Pi addition but I was ...
5
votes
2answers
6k views

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 ...
-1
votes
4answers
97 views

Raspberry pi power cable is unstable

The slightest bump, or knock to the micro power connection and my pi reboots. Anyone have this have problem? I wouldn't feel secure releasing a product that is so delicate.
1
vote
1answer
352 views

libCEC not working on LG TV (LD330)

I've just installed libcec on my Raspberry Pi B+ with (raspbian on it), following the instructions from here (https://nyxi.eu/blog/2013/04/15/raspbian-libcec/). I want to be able to turn on/off the ...
0
votes
2answers
67 views

Shutdown RPi by plugging power (SD card mounted read-only)

I setup my RPi to boot from SD card in read-only mode. Is it safe to just unplug the power in order to shutdown? Can any components be damaged? This way I could place a switch in front of my USB ...
1
vote
2answers
103 views

Would a powered USB hub for Model B work to power Model B+?

I've read somewhere that there are different power requirements for the Model B+. Question is would a powered USB hub that is currently being used to power the model B be good enough to power the ...
2
votes
5answers
615 views

Will a Duracell 9V battery power my Raspberry Pi for 24 hours? [duplicate]

Will a Duracell 9V battery power my Raspberry Pi (plus camera module) for 24 hours? I've tried power banks and the 50,000mAh rating seems a bit exaggerated, considering I'm getting just 5/6 hours ...
0
votes
0answers
18 views

Pi cluster (hypothetical) [duplicate]

I have been poking around on the internet and i have found these new raspberry pi compute modules. Further poking has found that people have made designs to hold 120 of these in a 1u server and then ...
5
votes
5answers
4k views

Will any external battery power a Raspberry Pi?

I am working on a project that needs the Raspberry Pi to work without a mains connection. I have considered buying a 50000mAh USB power bank. Would this power a Raspberry Pi, and if so, would it ...
0
votes
3answers
106 views

Power LED is very dim on RPi B+

if I am plugging in the power supply the red power led lights very dim. I found several guides to test the the board with a multimeter but these were for the other revisions, and it seems like B+ is ...
-2
votes
1answer
239 views

Current draw for + models (A+ and B+)

Essentially What's the current draw and supply voltage tolerance? but for A+ and B+
5
votes
2answers
119 views

Use a servo right from the GPIO without a breakout board

I've been researching how to use a servo on my Raspberry Pi but the tutorials concerning this seem very complicated. This surprised me, since the Raspberry Pi has GPIO built right in. Despite the Pi ...
0
votes
0answers
102 views

Ext. HDD I/O Error - suspends, power issues?

My external USB HDD becomes repeatedly inaccessible after a long time of usage/idleness. The same thing happened before with a very old disk and I thought it was just failing. But I do have the same ...
0
votes
4answers
245 views

Raspberry PI A+ Power requirements

I want to get a raspberry pi a+. I am trying to figure out how I can power it. I will use it with a USB Bluetooth WiFi Combo Adapter. The power consumption of the combo adapter is less than 1.5W. As ...
1
vote
1answer
138 views

Not enough power to the Raspberry Pi B+

I have a problem with my Raspberry Pi B+. First the problem was that I didn't get the keyboard or mouse to work and I have now found out that the Pi do not get enough power. When I looked on forums, ...
0
votes
1answer
111 views

Power on 5V GPIO power pin at boot

I am new to the Raspberry Pi, so I wanted to describe my project along side my question. I have a functioning Raspberry Pi A+ and I am building a heads-up display using a MyVu Crystal. This link ...
1
vote
1answer
41 views

problems running XBMC on 2011 Raspberry Pi

I have a 2011 Raspberry Pi and have been trying to get openelec (v13.2 Gotham) to run on it. I am powering the raspberry pi using a Sony phone charger outputting 5V at 850mA. Whenever I plug in the ...
2
votes
1answer
63 views

Eject ipod from Rpi without disconnecting

This is not a question on how to umount a drive. I have a 2nd gen ipod nano (old) that works great but has 0 battery life. I figure if I plug it into the raspberry, it can power it and it does. ...
3
votes
1answer
56 views

model B goes offline after a few days, power light is dim, V(TP1-TP2)~=2.6, but Voltage across power supply reads 5.12V

I have a pi model B being used to read from a rfid card reader. After a week or so of continuous use, it powers down and the red light goes dim; If I check the voltage across TP1 and TP2, I get ...
3
votes
3answers
249 views

Finding a relay capable of being constantly switched?

I've got a Raspberry Pi and some Christmas lights. I would like to use the Raspberry Pi to control the Christmas lights by switching them on and off with a Python script. The programming aspect of ...
2
votes
2answers
193 views

Switching power source from power bank to mains without interrupt

I'm planning to build a robot similar to one described here. The pi and the controller are going to be powered from powerbank. However, as big fan of live coding I am (there's gonna be some LISP ...
0
votes
1answer
78 views

Measure SoC (Juice left) in battery

I'm powering my raspberry pi with 2 no-break batteries. I want to know if is there any way for me to know how many percent of the battery is left. If is there anyway to measure it would be great so I ...