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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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71
votes
3answers
114k views

How much energy does the Raspberry Pi consume in a day?

My searching efforts have failed when trying to find this. On average, how much energy does the Raspberry Pi consume in 24 hours (minimal usage vs. max usage in a day and USB vs. Micro-USB powered)?
63
votes
6answers
119k views

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 ...
35
votes
3answers
12k views

Disable LAN9512

The LAN9512 is the hardware device which controls Ethernet and USB ports. This chip consumes almost 200mA, and it will be very useful to disable it to save energy when I don't need USB or Ethernet. ...
27
votes
7answers
87k 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 ...
16
votes
4answers
11k views

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....
11
votes
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 ...
11
votes
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?
10
votes
3answers
9k views

Creating halt/wake button?

I have rigged up a wake-from-halt button using pins 5 and 6. These two pins, when connected, will reset power and reboot from halt. I want to use this same button, if I can, to run a command that, ...
10
votes
1answer
2k views

System not shutting down properly

I'm running Arch, and when I shut down with the poweroff command (or with shutdown -h now) the 3 LEDs mentioned stay on. In addition, if I've plugged it into a screen, it displays > POWER OFF ...
8
votes
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 ...
8
votes
2answers
5k views

How to make Raspberry Pi suspend to RAM?

My application only uses Pi very occassionally and only a few seconds each time. It would be ideal if Pi supports suspend to RAM feature to save maximum energy. (I am thinking of the next step of ...
8
votes
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 . ...
8
votes
1answer
17k views

Hard drive not detected by the Pi

My raspberry pi is unable to detect my external hard drive, I'm wondering if I might have messed up in my setup. The hub is connected to the pi in two ways: from the hub to the pi's microusb to give ...
7
votes
2answers
2k views

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, ...
7
votes
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 ...
7
votes
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 ...
6
votes
2answers
45k views

how to disable raspberry pi power management? [duplicate]

I am using my raspberry pi as a headless server. The problem is that after a couple of hours of inactivity it seems to enter a power suspend state where it disappears from the web and refuses ssh ...
6
votes
3answers
674 views

RPi 3 - Reduce power consumption

I am looking to reduce the power consumption to a minimum on my RPi 3. For my project, the Raspberry Pi Zero is not an option. for now, I disabled Bluetooth and WiFi and made sure to kill some ...
6
votes
0answers
1k views

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, ...
5
votes
2answers
3k views

Display Powersaving Options (Pi powered on display USB)

Scenario I'm building several wall mounted kiosk that will be placed in remote locations and i'm trying to find a way to build in some longevity / power saving options (IE put them to sleep when the ...
5
votes
2answers
356 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
votes
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 ...
4
votes
2answers
809 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 ...
4
votes
1answer
5k views

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 ...
4
votes
1answer
15k views

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 ...
4
votes
3answers
507 views

How to halt Pi without turning off USB?

How do you safely shutdown or halt the Pi without turning off USB power? I have an application where an Arduino is connected to a Pi via USB. The Arduino manages a battery that powers both it and the ...
4
votes
1answer
878 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. ...
4
votes
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?
4
votes
2answers
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 ...
4
votes
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 ...
3
votes
2answers
6k views

Highest current raspberry pi can take from usb

I'm going to be working on a project from a DC power supply, and I need to know the maximum current the Raspberry Pi can handle from the USB port. I know my wall wart adapter that came with my Pi ...
3
votes
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, ...
3
votes
3answers
1k views

Light Controller System Help - What should I use in my build to individually control multiple lights?

I am currently working on a project with my Raspberry Pi.... I would like to be able to control 5 different lights at the same time, but only one of the lights will be on at a time. In theory, I ...
3
votes
2answers
19k views

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 ...
3
votes
2answers
536 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??
3
votes
1answer
336 views

What is the purpose of PD_SENSE in the Raspberry Pi 4 power circuit?

Here the schematics of the USB-C power input of the Pi 4 : You can see that there is a resistor connected to the USB_CC lines of the USC-C socket, the other side is labelled PD_SENSE and is going ...
3
votes
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, ...
3
votes
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 ...
3
votes
1answer
847 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 ...
3
votes
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 ...
3
votes
1answer
437 views

XBMC and unclean shutdown

So, I have my Pi, and based on some posts here, am installing Raspbmc. I have a nice powerstrip that senses current through the "main" outlet (my TV), and will switch off some of the outlet if there ...
3
votes
2answers
2k views

Why doesn't the RPi 4 power on when RUN pin is grounded?

I'm trying to power on a RPi 4 using the RUN pin. The RPi is runing LibreELEC (Leia) 9.2 ALPHA1. I tried shutting down the RPi from LibreELEC's GUI, then grounding the RUN pin for a second by ...
3
votes
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 ...
3
votes
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 ...
3
votes
1answer
459 views

Which Linux driver does control the PMIC of the Raspberry Pi 3B+?

The Raspberry Pi 3B+ contains the MaxLinear (previously Exar) MxL7704 power management chip (PMIC) with I2C interface for "on-line" reconfiguration of power sequencing and internal voltages.1 This is ...
2
votes
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) ...
2
votes
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?
2
votes
3answers
5k views

Power issues when connected to tv via usb

I have attached my raspberry pi to a tv and it is powered via the tv's usb port. The problem is that the raspberry pi shuts off a few minutes after it starts up. I am fairly certain that this is a ...
2
votes
2answers
55 views

On/off via UI or Sleep?

I will be using the Raspbian Lite OS. I want my Users to be able to switch the device on/off. I am using a battery source for the main application. I was thinking of providing kiosk browser UI (...
2
votes
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 ...