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Questions tagged [power-management]

Power Management is a feature of electrical appliances to enter a low-power state when inactive to reduce energy consumption.

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Raspberry pi powering issues

I am using Raspberry Pi 3 with latest pixel image: Linux raspberrypi 4.4.21-v7+ #911 SMP Thu Sep 15 14:22:38 BST 2016 armv7l GNU/Linux In the right top corner of the connected lcd screen, there is a ...
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2answers
676 views

Powering Raspberry Pi 3 alternatives

I am starting my first raspberry pie project and I am essentially going for a entertainment center. I ordered a 2.5A power adapter to provide power to the unit, but was wondering if it was possible to ...
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672 views

Wake display, via trigger and then have it sleep after n minutes?

We are looking at mixing a PIR (motion sensor) with a Raspberry Pi, such that the screen will turn on when motion in sensed and then sleep after a certain period of no sensed motion. The screen will ...
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1answer
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RPI3 USB port current?

I am using a RPI3 and have a GPS USB module and 3g USB dongle connected to the USB ports of the pi. I am using a 5 volts, 2.4 amps power supply. I was wondering if the RPI3 USB ports provide 1.2 Amps ...
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2answers
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Is halted a viable state for a battery powered pi zero long-term?

I'm building a battery powered device with a pi zero. The battery is a 3.7v LiPo w/ 2000mAh. I want to be able to safely shutdown and restart the pi using a single switch or button. (preferably ...
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588 views

Temporarily put a Pi into energy efficient mode (disable HDMI, avoid X Windows)

I want to deploy a RPi 3 in quasi-headless mode, i.e. no display attached, with an application running that takes time-lapse photos (with the standard camera module). Power is supplied through a ...
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0answers
817 views

Control USB power from Pi

I would like to control USB LED currently pluged into power socket from my Pi. I understand that it is not possible to simply switch ON/OFF given USB port on Pi. So is there some way, I could modify ...
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2answers
2k views

Check if current if flowing through 220v ac wire

I want to add a third switch to a room with two existing switches. This third switch will be simulated by a 4 relays and a raspberry pi. Image source: wikipedia, Multiway_switching So 1 have one ...
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1answer
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Shut down raspberry pi cpu and gpu cores and USB ports?

The documentation online allows the user to change RAM allocation and CPU clock speed via the config text. However, I am interested in reducing the raspberry pi 3 power consumption while not crippling ...
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2answers
3k views

Powering a Raspberry Pi from a vehicle battery 24/7

I am working on a project where my Pi is always connected to a vehicle to provide its GPS information. Seeing such a device must be always turned on, I am attempting to tap into a battery line that ...
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3answers
1k views

Can This UPS(UNINTERRUPTIBLE POWER SUPPLY) Run a Raspberry Pi for 24hours?

I am setting up an experiment that will need to run for 15 days straight and I am using a Raspberry Pi as a data logger. In my place power outages occurs from time to time. I am searching for cheap ...
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1answer
92 views

Pi 2 Question about power

I currently own a "WD My Passport Ultra 2 TB", It needs 500 mA to run. I only have a usb adapter that supplies my pi (2 b) with 1A. Would getting a better adapter allow me to power the 2TB drive? If ...
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802 views

Low Energy Consumption Kernel

I am thinking about compiling the kernel in order to have a low consumption configuration ready for the raspberry. Is there any configuration or .config created before compiling it with the power ...
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3answers
4k views

2 amp power supply for RPi2. Too much current?

I'm currently using a 5V 2A power supply; not sure if it is appropriate because some answers say that the max safe current is 1.2 amps. I'm a little confused about this. Is it safe to use my current ...
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1answer
2k views

Differences of Raspberry Pi models in GPU computation?

I know the publication Biosignal PI, an Affordable Open-Source ECG and Respiration Measurement System which uses Raspberry Pi A+ / B+ as a component isolated by ADums, since RP is not itself a medical ...
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1answer
120 views

Unknown fuse blow out in custom power board for raspi B cluster

I've been trying to adapt the design for power distribution layed out in this raspi cluster design. . While looking through the researcher's design, I couldn't find any use for jumpers 2 and 3, ...
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Can I use a DC-DC step up module to power a Raspberry Pi from 2AA batteries?

I understand that I can use 4AA batteries and a step down module to get 5V and power the Pi, however briefly. However, now I'm getting real outrageous and want to trying powering the Pi from just 2AA, ...
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339 views

Energy profiling tools for linux

I was wondering if you can give me any tools for energy profiling in linux. I'm going to use it to compare between two algorithms that are going to be used on a Raspberry Pi, and if possible, I need ...
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3answers
265 views

RPI Forever On?

I have my RPI2 deployed as a receiver at remote location which is intended to be forever on. But after some 20-30 hours, it goes into some mode with just red light turned on(no green light blinking) ...
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1answer
219 views

Power on/off button [closed]

Are there any alternatives to Raspberry Pi that have integrated power on/off button? In the past i managed to do it designing a small circuit, bypassing the power source with a relay, pulling down ...
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1answer
90 views

Powering Off RPI when on UPS

Is there any way by which I can power off RPI2 when system is on UPS after sometime using software only. My UPS communicates with the system using USB. But it has windows support. I want to have ...
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1answer
40 views

How should I connect the power?

I have a B+ connected to a H-bridge which is connected to 4 AA batteries and 4 motors, and they work fine, but now I want to add a distance sensor, which requires 5v, so do I need any extra batteries?
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866 views

Raspberry Pi 2 beeps when overheating?

I was compiling OpenCV for the first time on a Raspberry Pi 2 today. This process takes about 2.5 hours and continuously pushes the RPi to the processing limits it's capable of. About 30-40 minutes ...
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950 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 ...
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228 views

Does PI go to sleep or does it stop supply to USB if the drive is not being used for some time?

I have a 80G hard disk attached to my PI2B and I have a couple of software running on it. I noticed that sometimes the disk becomes inaccessible and I would need to unmount and remount the partitions ...
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1answer
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Remotely connecting to the PI to download images

I'm trying to build a little project (my first) with my Pi which is running Raspbian. I want to set up a camera on my piece of land where I'm going to build my house to take some time lapse photo's. ...
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1answer
40k 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 . ...
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2answers
5k views

Help on powering 3.3V fans

I'm not 100% sure if this is the right form to post in, and I'm not the best writer... so please let me know if I make no sense. So I'm doing a little project and was wondering on how I could power ...
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2answers
14k 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?
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1answer
4k 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 ...
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1answer
7k 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 touchscreen)...
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1answer
225 views

Raspi with readonly fs, does power loss still do damage?

I plan to use a read-only filesystem to lose power without corrupting data. I know some routers are designed this way. Are there any problems besides the filesystem I should be aware of?
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125 views

How can I charge a jawbone up using raspberry pi?

I am curious if it is possible to change the 3.5mm jack output on the raspberry pi to use it to charge a jawbone up fitness tracker?
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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 ...
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1answer
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External HDD will not spin down

I am having an issue with my external hard drive and it is quite annoying. So, I purchased the Samsung M3, for the sole purpose of acting as a mass storage device for my Raspberry Pi. Lovely. I ...
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2answers
355 views

Power regulation circuits on B+ vs 2 (light sensitivity)

I've seen recent articles on the Raspberry Pi 2 being affected by a light source (http://www.raspberrypi.org/forums/viewtopic.php?f=28&t=99042) . Apparently the cause is in the power regulation ...
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6answers
85k 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 ...
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2answers
4k views

Is it possible to create a keyboard shortcut that acts as an on/off switch?

I just got a RaspberryPi and I'm completely new to linux and all the intricate details of programming. My issue with the RaspberryPi is the difficulty with turning it on and off. After doing some ...
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0answers
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Running RPi on Solar Panel and battery [closed]

I’m quite new in electronic projects and so my basics are quite limited. I've been reading a lot regarding this topic (refer to the title) and I’m currently planning to buy the suitable Solar Panel, ...
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1answer
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B vs. B+ power consumption

I've read several comparisons of the Model B vs. B+, and they mention that one of the benefits of the B+ is it has lower power consumption. With the same processor, and most of the same components, ...
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3answers
2k views

Car computer how to connect to car battery and also not drain battery when the car is switched off

I am doing research on creating a car computer with raspberry pi (so I have all the basics down before I start this project) and I am looking on a way to switch the whole device automatically whenever ...
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1answer
4k views

Raspberry Pi B+ usb port disable

Is it possible to enable/disable arbitrary usb port in ArchLinux via console on Raspberry Pi B+ and at the same time others still work?
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1answer
491 views

Using Raspberry Pi to make Internet TV box (Power on/off issue)

I need to make a box (STB), which when plugged into TV can display live streaming URLs and can be controlled from remote control. So that a user can have the same experience as of a traditional live ...
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2answers
532 views

Does Raspberry PI Model B+ Works Over 24*7 and 365 days continously? [duplicate]

Does Raspberry PI Model B+ Works Over 24*7 and 365 days continuously??
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2answers
326 views

HDMI -> VGA idle power?

I have a HDMI -> VGA cable for my Pi that works well when I want to use it. The cable stays slightly warm even when not in use, but connected - I would like to know if it's possible to "shut down" ...
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4answers
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Pi Headless: How to confirm that the Pi is shut down

I am running my Pi headless connected to my wireless router using a ethernet cable. I wanted to shut down the pi remotely even when I am not connected to it using SSH/Putty to shut it down exclusively....
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3answers
578 views

Using battery pack as a UPS

I need to use raspberry devices as mini servers. I'll need to install ~100 of them in different locations. In those areas, electricity power offs are quite common, so I'm thinking using a cheap usb ...
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2answers
117 views

Powering a RPI with its circuit from one wallsocket

I want to power a Raspberry Pi with 54 LEDs (24 white, 24 warm white, 6 RGB - probably all at 20mA or something like that) from one wall socket. I'm planning to use the Pi to control the LEDs via ...
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1answer
839 views

Does the Raspberry Pi camera module have any power saving modes?

My question is related to this one I just asked But this time, I want to know if I can cut the camera power. A FAQ says it draws 250mA, but I don't always need it to be on, so are there any power ...
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1answer
951 views

How to cut power, especially by sleep mode and disabling peripherals?

I've never used the R. Pi before, but am considering it (model A) for my application. The main attraction is the hardware H.264 encoder, but not the power consumption :( I've read about a few power ...