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
28 views

Rasbperry Pi 2 + WD My Passport (external 2.5 USB 3.0)

I've tried to connect the external WD My Passport directly to Rasbperry PI 2.0. But experienced some issues. When max_usb_current=0 HDD is running (but with some strange ticks) but is not detected. In ...
1
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1answer
38 views

Need 1 more 5v Pin - what to do?

First off I have only very basics of electronic understanding, so I welcome any help that I can get. I use a Touchscreen on my Pi that occupies all 5V and 3.3V pins. I also want to use a 433 ...
1
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1answer
51 views

How to switch the current draw to 1.2A instead of 600mA?

On the website of raspberry pi 2 I read that the current draw for usb ports can be switched from 600mA to 1.2A. I searched around and I couldn't find anything that shows how to do that, I went to ...
1
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4answers
186 views

When is it safe to switch power off after halting Pi

When is it safe to switch off the power supply to the pi after it was halted? I am using ssh to access my Pi (runs Raspbian), and sudo poweroff to shut it down (the wifi dongle keeps blinking for a ...
1
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0answers
34 views

Power with batteries on 3.3V

I've already investigated how to power the RPi with batteries (I did some tests with AA batteries and with 18650 batteries) using a 5V "boost" step-up DC-DC converter, in some other questions here. ...
1
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1answer
225 views

How to make the Raspberry Pi consume less power

What methods can be used to reduce the amount of power a Raspberry Pi uses?
0
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1answer
41 views

Wire 5v to raspberry pi b+ without microUsb

On the original model b it was possible to wire power to the tp1 and tp2 (which ran through the fuse and was protected?) I am upgrading my 3d printer to run with a b+ but the b+ does not have the same ...
2
votes
2answers
517 views

How to make a high powered USB hard drive work with the Pi?

I tried directly connecting my WD My Passport Ultra 1TB USB hard drive to the Pi but it draws too much power, and it doesn't even run the OS. Is there any way to connect it without damaging the Pi?
2
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2answers
72 views

Power and Internet over a 15m distance

I'm planning to put my pi in a bird box at the end of the garden. The distance is 15m away from the nearest power source and the router. What is the best way of getting power and Internet to it? ...
15
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7answers
3k views

Why does the Raspberry Pi not have a power button?

If you buy a computer you expect it to come with a power button. So why does the Raspberry Pi not have one? Is it because it would take up too much room or be awkward to fit on the PCB? Personally ...
1
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1answer
26 views

Red LED blinks twice on boot with 5V/5A power adapter!

I use RPi B+ for playing a folder of videos automatically after boot. But the problem is that during the initial boot, the red LED on the board blinks 2 times (one after 4-5 seconds of boot, and the ...
0
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1answer
73 views

Safe shutdown button not working

I used the method described here and here , which is a python script based on interrupts, to enable safe shutdown via push-button press. These are the steps in short: 1- sudo nano test.py 2- and ...
0
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1answer
30 views

Turn TouchScreen Backlight Off after Shutdown

I have seen some questions on turning HDMI screens off but my question concerns GPIO attached touchscreens. When I run sudo halt -h on my b+, the OS(hacked version of Raspbian to work with ...
0
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4answers
70 views

Read-write filesystem + no problem when halting the Pi by removing the power cord?

Is it true that removing the power cord without doing halt on a normal read-write root filesystem could cause filesystem corruption? For my embedded project, it's impossible to shutdown with a clean ...
5
votes
3answers
678 views

Can I use the 3.3v pin instead of the 5v pin?

I am using a HC-SR04 ultrasonic sensors, and I don't have enough 5V pins on a Raspberry Pi, and I don't want to buy an expander. So is it possible to use the 3.3V pins on some of the sensors? What ...
1
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1answer
56 views

How do I interpret the Volts and Amps on my Raspberry Pi Power Adapter?

I have a Raspberry Pi 1 Model B. I have now bought the Power Adapter so I can finally start using it. But I am wondering how to interpret the information written on my power supply. The Power Supply ...
2
votes
3answers
91 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
87 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
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1answer
117 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
119 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
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1answer
163 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: ...
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1answer
375 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
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1answer
25 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
44 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
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2answers
326 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
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1answer
225 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
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1answer
158 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
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1answer
88 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
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1answer
282 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
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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
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1answer
299 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
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2answers
119 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?
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1answer
201 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
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1answer
97 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
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1answer
75 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
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4answers
89 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
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1answer
208 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
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3answers
254 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?
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2answers
152 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
100 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
185 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
166 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
148 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 ...
11
votes
1answer
10k 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 ...
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4answers
107 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
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1answer
471 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
74 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
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2answers
116 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 ...