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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2answers
30 views

Safest way to power a hungry Wifi adapter and the Pi from a single 5V source

My Pi is destined for the skies, so it will receive power at roundabout 5.3V via the BEC (battery eliminator circuit) which will be capable of delivering up to 10A (heavy duty BEC it is), so sourcing ...
-6
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0answers
27 views

Thoughts on cool illuminated power switch? [on hold]

what do you think of this switch on Kickstarter? I think I'm gonna get one! https://www.kickstarter.com/projects/1312527055/illuminated-raspberry-pi-safe-shutdown-switch
1
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1answer
41 views

Used-to-be-working Pi does not boot, shows no lights, gets pretty hot

I have a Pi running a super-stock Raspian installed with NOOBS (If I remember correctly). Yesterday, it was working fine. I stopped using it for a bit to debug some other parts of the project this Pi ...
1
vote
1answer
38 views

RPi running too many accessories

I am new to the PI. I am building a pi that will have cameras, sensors and all sorts connected to it. I am wondering even if I use an over powered power supply at 5.3v will it really be enough to ...
-1
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2answers
57 views

What GPIO pins are required to Power RPi? [duplicate]

We are using Raspberry Pi Model B: We used USB connector from PC - confirmed output - 5V, with 2 leads: Connected +5V to Pin 2 Connected GND to Pin 6 on connector - Inserted Ethernet cable ...
0
votes
1answer
45 views

Powering multiple full-size bulbs

I'm working on a Pi project where I will need to have 4 lightbulb turn off and on based on schedule. The programming aspect is no problem but I'm guessing the GPIO pins are not powerful enough to do ...
0
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2answers
46 views

Battery packs without “blip”

The Battery pack I am using for the has just one problem... plug in the pack to charge the pack itself, and it blips, rebooting the pi (not the mention shutting down most ungracefully.) Are there any ...
1
vote
1answer
30 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 ...
2
votes
2answers
107 views

Power the Raspberry Pi via the 5v Pin

I tried to power my Raspberry Pi via the GPIO header, but it didn't work. I powered it with exactly 5v, but it won't boot, but the Status LED "ACT" is on. It's darker then normal, but it's on. I think ...
1
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3answers
93 views

Control 18 LEDs individually? (17 GPIO pins)

Note: I have read Controlling many LEDs with few GPIO pins, but I can't buy additional parts (Degree project) The end result is to make a noughts and crosses grid with 2 LEDs per grid cell. This ...
1
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1answer
62 views

Restart after power Failure with FSCK?

Is there any way to have a Raspberry automatically after a power failure? This is a great feature on Mac OS X that I would like to have on my Pi because of it's usage. It would also be great if I ...
7
votes
6answers
2k views

Raspberry Pi as power switch

Can I use the Raspberry Pi's GPIO pins to make the Rasperry Pi act as a switch? I would like to shut down, boot up and reboot my computer via hardware remotely. My idea was to take the PS_ON# pin ...
2
votes
0answers
172 views

How to know if Raspi is bricked

I have a Model B Raspi and - shame on me - overpowered it with about 9V. And to make it worse I powered it using the test points TP1 and TP2, avoiding the polyfuse. ...
0
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2answers
218 views

Raspberry pi not booting!

help me guys, im really desperate :( my RPi out of sudden stopped booting whenever i plug in the power cable it only turns on the red led! nothing more than that.. i've checked this site to ...
1
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0answers
41 views

power an HDD without backpowering the PI or a powered USB hub [duplicate]

I have a raspberry pi being powered by a cellphone charger (1A) I try to connect and HDD but the power is not enough. I donĀ“t have a powered USB hub BUT i do have other power supplies. So I tried ...
0
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2answers
36 views

how to know how much battery power in remaining?

i got 2600 mAh powerbank for Pi and it manages to stay for some time for my use..But i want to avoid wrong shutdowns due to power failures so .. Which will be the best way to avoid power failure ...
2
votes
1answer
163 views

USB stick gets very hot

I have a 32GB, USB 2.0 ICIDU USB stick that I want to connect to my Raspi for storing ownCloud files. The stick is FAT32 formatted, from factory. My Raspi is running ownCloud 6 using this image: ...
0
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2answers
67 views

How to keep the the mini USB power secure?

I'm a total newbie here so please be gentle. I'm thinking of using a Raspberry PI and a USB drive to make a NAS, but I'm worried about the way the PI gets its power. It looks like the power plug ...
2
votes
2answers
105 views

Any ideas on how to increase the range of an IR transmitter?

I just started using the raspberry pi and I intend like many others to use it for home automation. After hours of trying to capture the input of the AC remote with irremote and actually using raw data ...
1
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0answers
57 views

Boot using correct display setup

I have my pi plugged into a power strip with my TV. The pi starts up ~10secs before the TV. As a result, I put hdmi_force_hotplug=1 into config.txt. Now, if I power up my pi normally by switching on ...
1
vote
1answer
57 views

How you would build a Robot with a raspberry Brain? [closed]

I think about building a Robot with the raspberry as the Control Unit. Anybody of you done that already? The question is about Which hardware can controlled by the raspberry? How you would solve the ...
0
votes
2answers
59 views

RPi will not start; No green flashes; Reflashed SD; 5v 1.9A power

The title says it all. I bought this Pi from Amazon about 2 weeks ago and, after I shut it down, it refused to boot. I've tried reflashing the SD with wheezy, to no avail. I have a Pi hub. I tried ...
1
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4answers
149 views

Raspberry Pi to email when power outage occurs

Ok, my idea is for my raspberry pi to email me when the power goes out. Some things to note: the RPi is powered by battery backup, it will still be on when the power goes out. all of my network ...
2
votes
0answers
77 views

Raspberry power supply via PoE (power over ethernet) [duplicate]

is it possible to supply a raspberry pi via PoE? if not - why :D ? kindly
0
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1answer
29 views

Not powering down after installing upstart [closed]

I just installed upstart from the repositories, and I am now facing a strange behaviour: To properly shutdown (power down), I need to run shutdown -r then shutdown -h. To reboot it is the opposite (-h ...
0
votes
1answer
89 views

Can one use 2 Ampere power without frying pi?

My requirement is to sniff WiFi packets, for which I've heard that we need more current into the chipboard. I've figured out that around 1 A for raspberry and 1 A max for WiFi adapter should suffice. ...
3
votes
4answers
481 views

OS that would not corrupt SD card when abruptly shut down?

There are a bunch of operating systems available to download for the Raspberry Pi. I wonder if there is a OS that would not corrupt the file system/SD card when unplugged from power source without ...
0
votes
1answer
352 views

Power a Pi from a hard drive enclosure?

I want to build a very small Pi case including a 2TB hard drive, with only a single power cable for both the drive and the Pi. It looks like a good option is an enclosure such as this, designed for ...
0
votes
1answer
118 views

Creating a power button with an NES?

I have an NES that I am creating into an Rpi case. I want to try to do the following: *Connect the power button to my Rpi to 1: Turn on the Rpi when pressed in (On) 2: Run a shutdown command ...
2
votes
1answer
175 views

Ethernet connection drops after several seconds

I recently got a Raspberry Pi, but I've been having trouble getting a working internet connection. At the moment, the pi will connect, and I'll be able to access the internet for about 15 seconds ...
3
votes
2answers
113 views

5.8V Electrical Short = half baked Pi

I just shorted 5.8V+ (4 half-done AA batteries) through my Pi... at most for 3 seconds... it went through somewhere near the ethernet port... whilst connected to the ground of the circuit, also ...
1
vote
2answers
254 views

Shutdown properly when power-supply can't supply anymore

I've been through tags "power-supply" and "power" of this website and surfing on a lot more but I did not found any answers or information about the subject I'm about to talk about. So, I'm looking ...
3
votes
2answers
291 views

Halting inevitably leads to reboot

I always shut down the system with halt, which is the equivalent of shutdown -h now. On every linux system I've ever used, including up until recently the pi, this halts the system and turns off the ...
0
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2answers
481 views

I need a USB keyboard, mouse and wi-fi adapter to work on my RPI *under 200mA*

I am the co-founder of http://communitykit.org/. I was wondering if anyone knows of a good combination of a wired keyboard, mouse and wireless adapter for the Raspberry Pi. The trick is they all ...
1
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2answers
905 views

Powering 4 x 12-15v motors with Raspberry Pi (quadcopter)

I'm planning on creating a quadcopter using the raspberry pi, however, Im a bit unsure about how to power motors which require an external battery power source. I've seen servo and motor boards ...
2
votes
2answers
182 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 ...
0
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0answers
105 views

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 ...
1
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2answers
162 views

Stop raspberry pi from turning on when plugged in

I am planning to use raspberry pi in an embedded design. Is there any way i can prevent the pi from automatically turning on when plugged in?
2
votes
2answers
278 views

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 ...
3
votes
1answer
130 views

Raspberry Pi Franken-charger: A Mini-B-to-Micro-B Conversion

So I go to the thrift shop around the corner, and I'm met with these two boxes in the electronics' section: I'm sifting through these one by one, tangle by tangle, searching for a power adapter ...
2
votes
1answer
361 views

Is using a powered hub with the Pi safe

I read recently (I don't remember exactly where) that you could power the Pi from a "cheaper" USB powered hub. I just tried this, and it works. On checking the Pi schematics, it seems the USB port ...
5
votes
2answers
257 views

Battery Power Requirments

I have a Raspberry Pi Model B, which I plan to use build a small two-motor robot. The motors are powered externally by 4 AA batteries, and are to be controlled by at first by two large NPN ...
5
votes
2answers
132 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 ...
1
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0answers
155 views

Wired connection continually dropping

I've been having issues with the wired connection on my Pi. The connection keeps dropping out and then reconnecting constantly. About half the time it'll completely drop after a few minutes of this. ...
6
votes
1answer
437 views

How to remotely reboot halted Pi

I'm thinking of building an array of Pis but I'd like an intelligent method of powering them, i.e., I would like power to each to be controllable via USB. I like the USB GPIO Module suggestion given ...
0
votes
0answers
133 views

Power for 12V SainSmart relay

I just get my Raspberry Pi and want to start working on a project. Can anyone offer some insight into what I need to power this 12V SainSmart relay for my Raspberry Pi?
1
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1answer
919 views

Should I leave the Raspberry Pi plugged in after shutdown?

Are there any problems with leaving my Raspberry Pi powered even though it is shutdown? Sometimes I forget to unplug it after running sudo halt, so I was wondering if I was affecting the lifespan ...
0
votes
1answer
134 views

MySQL not starting after powering the Raspberry Pi off

I have a raspberry pi with MySQL installed. I turn off my raspberry Pi by unplugging the power (no system shutdown). At some points the MySQL get infected, and after that it will never turn on ...
1
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2answers
53 views

Turns off when touching test points

my pi was running fine and then I tried plugging in an alfa wifi adapter into it, and SSH stopped responding so I assume it had crashed, then it wouldn't fully boot and gave an error (Kernel panic - ...
0
votes
2answers
2k views

External power of raspberry pi without going through GPIO

First off I have only very basics of electronic understanding, so I welcome any help that I can get. I have a raspberry pi that is powered off of the GPIO pins (yes I have read that this is bad and ...