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.

learn more… | top users | synonyms

1
vote
2answers
200 views

Which PSU should I use? 5.35v 2A or 5.1v 2.1A

Recently bought my first raspberry pi 2 B and I'm wondering what PSU I should use, I have 2 adapters and I wonder which one would be best: either 5.35v 2A or 5.1v 2.1A
0
votes
1answer
13 views

Load and Clock Speed vs Power Consumption

What takes less power? Running the CPU at a low clock and having a high load or running it at a high clock speed and having a low load?
0
votes
0answers
9 views

Pi loses connectivity and stops running scripts after a few hours

After a few hours unattended, powered by a spare microUSB phone charger, my pi loses connectivity and stops running scripts, which don't depend on internet connectivity. An example of a ...
0
votes
0answers
20 views

Will this PSU be enough for Raspi 2 B & WD extern HDD?

I recently bought a raspberry pi 2 B and I was planning using an external HDD with it (this one: http://www.newegg.com/Product/Product.aspx?Item=N82E16822236569) and I'm wondering if this PSU will ...
0
votes
1answer
14 views

How to troubleshoot power issue on RPI2?

I RPI2 is not booting up and just keeps both leds on in solid manner. I've found a power troublesheeting guide for RPI1 http://elinux.org/R-Pi_Troubleshooting#Troubleshooting_power_problems I'm ...
0
votes
2answers
24 views

3.5inch RPi LCD display - detach from RPi2

Recently I have bought the Raspberry Pi 2 along with a small 3.5 touch screen. It works fine and I'm more or less happy with it (there is some choppiness in the rendering of things (even the cursor is ...
0
votes
0answers
9 views

One switch to reset multiple pis [closed]

I know you can reset a single pi by attaching a header to reset/P6, and soldering a momentary switch to the header. I have a system I'm building that uses 2+ pis as a cluster, and it would be nice to ...
0
votes
1answer
33 views

Can my Pi run constantly, playing a video, all the time?

I have a raspberry Pi That is playing a video on an old lcd screen constantly, nonstop. It is being powered by a 12v security camera power supply: ...
0
votes
2answers
39 views

Increase raspberry pi voltage

Say I bought you a RC car as a gift, that works on 24v battery. You decided that RC car is boring and want to control it with raspberry pi 2. There are two motors on the car. You bought a voltage ...
1
vote
1answer
40 views

HDMI to VGA adapter power

I have a Raspberry Pi Model B, and I would like to plug it in a VGA computer monitor. I have been reading about this subject, but I am no expert in electronics, and so I am afraid I might end up being ...
0
votes
0answers
39 views

Motors have stopped working

I was building a model car, and had 4 motors connected to a h bridge. Everything was working exactly as planned, the car was fully operational, but after a day I ran the program again and some of the ...
4
votes
1answer
224 views

Controlling Servos with a Raspberry Pi

I am not sure if this will break my Pi, so I decided to double check In this image is a simple servo connection, I am still learning how servos work. I actually have two questions: If I decided ...
0
votes
2answers
59 views

The power LED will not light- power supply is fine

The power (red) LED on my pi will not light. It was working fine, but then suddenly, while I was using it, poof! At first it blinked occasionally, now it just won't turn on. The power supply was as it ...
0
votes
1answer
87 views

How to achieve Low Power Consumption on Raspberry Pi via Software and Hardware control [duplicate]

Would like to enquire if anyone could list any/or all possible ways to achieve low power consumption on the raspberry pi. I have found that one could disable the USB ports of the raspberry pi . ...
2
votes
3answers
56 views

Raspberry Pi's Power LED does not light, heat and no boot!

I was using my raspberry pi and was testing a piece of code, what I wanted to happen happened, however immediately afterwards the Pi stopped working. Now, when I give the Pi power, the red (power) LED ...
1
vote
1answer
31 views

What kind of USB extension cable (3m) to power up raspi B?

I have turned my raspberry pi B+ into a wifi repeater (i.e running 2 usb wifi keys). It runs on a portable power bank now. So I am limited by the lifetime of the battery, approx. 3 hours. I already ...
3
votes
2answers
124 views

How to power Raspberry Pi 2 B with a powered USB hub that also powers peripherals?

I currently have a Raspberry Pi 2 B that I am trying to run off of a 2.5A 5V powered USB hub, while also having my peripherals off of that hub. I have the output of the hub to the regular Pi USB slot, ...
0
votes
5answers
68 views

need an opinion for portable power [closed]

I know opinion questions are frowned upon in the maker world (too many right answers and all) BUT I'm working on a pi powered security bot. I've got most of the prototyping and programming done (using ...
2
votes
2answers
29 views

Calculate Raspberry led strip's power need [closed]

I have a LPD8806 led powerstrip with 32 leds connected to my raspberry and it works fine on my 5v 2a power supply.. I ordered now also a 60 led version.. is there a easy formula to calculate how much ...
1
vote
1answer
80 views

pi2 stopped working

I have a pi2 Model B v1.1 which has been working fine for the last few months. I have 2 micro SD cards, one with raspian on and the other openElec with XBMC. Yesterday they both worked, today, neither ...
0
votes
1answer
100 views

My Pi2 won't boot. How do I check\measure the voltage on a Pi2

So my Pi is giving me the red light of doom and I want to check to see if the power supply is faulty. How do I measure the voltage on the Pi2 from the power supply to ensure it is not faulty?
1
vote
2answers
170 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
vote
1answer
48 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
vote
1answer
94 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 ...
2
votes
4answers
223 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
vote
0answers
73 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. ...
2
votes
1answer
288 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
votes
1answer
142 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 ...
3
votes
2answers
778 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
votes
2answers
81 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? ...
16
votes
7answers
4k 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
vote
1answer
47 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
votes
1answer
114 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
votes
1answer
70 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
votes
4answers
82 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
817 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
vote
1answer
70 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
150 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
118 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
246 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
187 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
31 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
382 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
428 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
27 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
53 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
355 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
350 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
192 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 ...