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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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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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7k views

Controlling 240 volt power supply (via Relay) with Raspberry Pi

I love my little raspberry pi, and I am reviving an old home automation project, but instead of transmitting (in the old project, a butchered remote control) a signal at 433MHz (described here) to ...
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1answer
1k views

Log undervoltage

So I have a pi running Kodi, when it's in trouble it gives a powerbolt on the screen. Great. Now I know. Secondly I have a pi as a webserver headless 100% of the time. How can I log/see if it suffers ...
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8k views

Pi Zero W power through usb socket

Can I power a Pi Zero W and still use the usb hub at the sametime with this?
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767 views

Wake raspberry pi NAS on LAN

I build myself a NAS using my raspberry pi model b with an external power hub with 2 connected hdd's. Instead of leaving everything always running, I want it to only run while it has to. So I need ...
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1answer
6k views

Cut GPIO power on shutdown

I'm developing a project where I have a button connected to the Raspberry Pi GPIO where it sends shutdown command when pressed for 3 seconds. I also have a 16x2 LCD that outputs status messages. When ...
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Can the 5V and 3.3V power pins be used to power multiple devices?

I am building a device that will be controlled by several digital encoders, all which are hooked up to the device's Raspberry Pi 3 model B. I know this may be a trivial question but bear with me as I ...
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1answer
89 views

Will the Powerboost and Sleepy Pi be able to work together for my device?

I'm trying to build a portable PDA like device, based on a RPi and am currently in the process of working out my hardware requirements. I was looking at the Powerboost 1000C for the purposes of being ...
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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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Home energy monitor devices

I'm making use of multiple Raspberry Pi's to monitor my home's temperature, humidity, e.t.c... I would now like to add home power use monitoring. I've done a fair bit of research, but I've not found ...
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How to determine from hardware, when I can shut off a Raspberry Pi 3

I am wiring up a raspberry pi to use a battery supply and I would like it to be a single switch controlling its power. Obviously, I don't want to cut power when its running, but I also don't want two ...
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1answer
375 views

Will low power indicator come up on any os(retropie) if power is low?

I'm building a portable gaming system and I have a power bank coming in for it I want to know if it will indicate a warning if my "battery" is not supplying enough power so I know when to shut it ...
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1answer
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How can enable Deep sleep mode in Rasberry PI

If mains fails and my device is working in battery mode I would like to disable Ethernet, USB, HDMI, turn off the LCD backlight etc. Is it possible to disable these modules? My device battery is ...
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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
2k views

Will RPI3 power down an external USB hard disk if not used for a certain amount of time?

Supposing I am more interested in power consumption than the lifespan of the HDD, does Raspberry Pi 3 power down automatically an external USB hard disk? If it doesn't do it automatically by default, ...
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Power Supply for PI Zero [duplicate]

I was thinking about getting a cable for Pi Zero, this one: https://www.adafruit.com/products/1995 But it's 2.4 ampere, won't that overcharge the little Pi Zero and damage it? The specifications say ...
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2answers
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How do I turn my pi3 back on?

I'm using the LibraELEC image on a new Pi3. When I navigate to the power icon (using mouse on the desktop, or the corresponding button on a remote control) it offers a menu for cancel, reboot, or ...
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1answer
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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
678 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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2answers
1k views

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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3answers
4k 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 ...
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0answers
608 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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829 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
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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
2k views

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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Disable screen blanking in X-Windows on Raspbian [duplicate]

We intend to use a RPi at work to drive a status display panel - it will show our project's bug status and a few other statistics of vital importance. I've been trying stop the screen-saver from ...
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3answers
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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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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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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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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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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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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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2answers
348 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
582 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
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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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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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
231 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
878 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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2answers
972 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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1answer
875 views

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
41k 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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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
956 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 ...
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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 ...
4
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1answer
226 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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1answer
1k views

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 ...