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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58 views

Does Raspberry Pi 4 consume considerable amount of power in soft-off state?

In the Start menu (you know, the fruit button at the top-left corner), I clicked shutdown. I did not unplug the USB-C power cable. The red light was still on, but I thought it was like the sleep light ...
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Raspberry Pi 3 Model B+ got hot even in idle

My Raspberry Pi 3B Plus is running Raspberry Pi OS (32-bit) Lite. I only made update, upgrade and install Apache2. It is connected to my home network with 1Gb Ethernet cable (no WiFi). Network traffic ...
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167 views

Issues with the IOT Bit 4G hat

I would like to have some internet connection everywhere with my Raspberry Pi. To do so I bought the IOT Bit 4G hat for the rasoberry Pi ( https://www.mouser.be/new/altitude-technology/altitude-tech-...
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101 views

Killing Power at GDM3 Login

I understand that killing power to a running pi without first shutting down can damage the SD card. Can Killing power at the GDM3 login screen also damage my SD card or do I need to run the GDM3 ...
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30 views

Do I need to explicitly turn-off unused modules like wi-fi or hdmi to conserve power?

I just got my first PI4 to be used as a NAS with OpenMediaValut and USB3 HDD. It is connected to my router directly via ethernet. I'd like to make sure it is not consuming more power than needed for ...
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129 views

How to connect 2 boards to a raspberry pi 3

I am building a home console stereo and I am going to use an RPi3 with a hifiberry dac+. And I am wondering if I can use a waveshare power relay to be able to control the power to the system from my ...
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1answer
196 views

How many amps does a pi with 11 sensors need?

I have received so much support from this community by reading already answered questions. But now I got one that hasn't been asked yet. I have nearly a dozen sensors connected to my pi 3 so it's only ...
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1answer
31 views

How to let Raspberry 4 B stop spinning the external hard disk when there is no write or read request?

Device: Raspberry 4 B; OS: Arch Linux ARM; Interface: USB 3.0 I have a Raspberry and external HDD, all the stuff's details are above. I want to automatically suspend my hard disk (in order to ...
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1answer
512 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 ...
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2k views

Reduce power consumption script

I have read on this blog that you can reduce power consumption: https://www.jeffgeerling.com/blogs/jeff-geerling/raspberry-pi-zero-conserve-energy By disabling the HDMI port. He says that I should ...
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9k 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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5k 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 ...
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Make “iw wlan0 set power_save off” permanent

Q How can I make iw wlan0 set power_save off permanent for stretch? What's the proper way to do it? Edit I'm using an r-Pi 1 Mod. B with an Edimax wifi dongle and Raspian stretch.
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Powering using 5V rail fails

I have reviewed a lot about powering the PI using the 5V pins on the expansion connector but I have not seen the solution to this problem. Here are some of the tests I ran: (Setup: Nothing plugged in ...
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Is it possible to turn off my MHS3528 (ILI9486) TFT backlight?

I've got a TFT screen that uses the goodtft MHS35-show script. The screen works, and hooray, that's great! Except... It stays on, all the time, at full brightness. I would love to be able to turn my ...
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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)?
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60 views

3.5" TFT screen keeps hibernating

I have been working with my RasPI 3 (using Jessie) for a little while on a project that I am SO CLOSE to finishing. Right now the main problem I am having is that I cannot keep the frigging screen ...
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1answer
718 views

How should the J2 header be used on a raspberry pi 4?

The posts I found online show conflicting information on how the J2 header should be used, and seem to be derived from trial and error. None of the answers I managed to find seem authoritative; i.e. ...
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1answer
68 views

Which peripherals remain powered when the raspberry pi 4 model B enters poweroff state?

When I ran the command poweroff in ubuntu 19.10, I noticed that both the Ethernet port and USB ports remain powered even when the rbp4 seemed to have halted. Others using rasbian seem to have had ...
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651 views

Raspberry pi 12v relay

I have bought this relay: https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F262722739443 In the '1 channel 12v relay' variety I am going to be using it to power ...
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1answer
152 views

Power Supply Raspberry pi 4

I have googled a lot but didn't find anything useful. Can I use any power adapter other than the official Raspberry Pi supply? Moreover, I have an Argon One Case and many people have recommended ...
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1answer
7k 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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1answer
86 views

Power off Raspberry Pi if charger of powerbank is connected and turn back on if disconnected

I have a (maybe trivial) problem. I want to power a Raspberry Pi (more specific a SteroPi) with a power bank. The power bank has the feature, that its output is always on. So even if I plug in a ...
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Raspberry PI 3 A+ x5 Cluster PSU Needed Recommendation

I plan to make this x5-x6 RPI 3 A+ cluster but I am no sure what USB Charger to use. I would really prefer something with 5-6 ports. I know the spec for output are 5V/2.5A and I plan to use it in ...
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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
108 views

Best way to control power supply?

I have a system built with a Raspberry Pi 4 and an Arduino to control its startup, shutdown and reset, I have already started to design a current monitor circuit (discussed here). But one of the ...
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1answer
93 views

How to turn off USB chip permanently?

I am seeking ways to reduce power consumption on my raspberry pi 3B+. I've read that one of the most efficient ways is to turn off the USB chip. This link shows how to do so via the toggle commands. ...
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213 views

how do I automatically power off the raspberry pi and cut power every night and then power it back on each day?

Background I'm a student working on research project to develop a remote wireless sensor network of data loggers. Each data logger (aka node) is going to be retrofitted to a bird feeder that reads ...
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1answer
96 views

How to power a Raspberry Pi and servo motors with one power supply

I'm building a robot using Raspberry Pi and several servo motors. I'd like to power all components using a single lithium ion battery. I've looked into using a motor driver hat, but it seems the motor ...
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3answers
70 views

Raspberry pi power issuses

i just want to supply power for other devices which uses 5 v dc from the raspberry pi by cutting and soldering the wires and also i want to connect all the USB ports with mouse keyboard WI-FI dongle ...
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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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1answer
924 views

RPi 4 consumes 2.5W when shut down

My RPi 4 consumes about 0.5A after executing sudo halt, while according to this post it should draw at least an order of magnitude less (0.069A). The green LED blinks several times then goes off, but ...
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116 views

Turn Raspberry Pi off but keep the RAM powered?

Is it possible to turn almost everything on a Raspberry Pi off (CPU GPU etc), except for the ram? Basically putting the Pi in a low power state but preserving whatever it was doing at the moment on ...
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959 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 ...
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USB Power Draw Plug In Order

I'm having some issues running a USB webcam and a USB speaker at the same time. If I plug in my webcam second, both devices work perfectly fine. If I simply boot with both plugged in, the speaker ...
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1answer
238 views

Run turn off/on HDMI on specific time

I want to do the following: Use my raspberry pi as a smart display, kind off like what the Chromecast does when it's not streaming anything. I also want it to turn on and off at certain times, like ...
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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 ...
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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, ...
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246 views

Is it possible to toggle 3.3V and 5V header pins on and off? [duplicate]

Header Pins 1, 2, 4, 17 are labled 3V3 and 5V on the schematics but the connections to the BCM and/or regulators are not in their documents. It appears the 5V node is coming from the raw USB/external ...
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Trouble connecting USB devices with Raspberry Pi Compute Module on custom PCB

I am working with a team designing a PCB that works with the Raspberry Pi Compute Module 3 card. We are having a bit of trouble with the USB ports. The schematic of the USB portion is somewhat similar ...
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453 views

Raspberry PI automatically turning on after I put it to sleep using GPIO

I implemented a simple script (well, someone else created it, just installed it hehe) to shutdown my raspberry pi when a button is pressed that connects pin 5 and 6 (I think those are the numbers - ...
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113 views

Power management in Windows IOT

Because my project is in the field and not in a lab, power consumption is a significant issue. According to specification an idle Raspberry Pi 3B+ bare board has a current draw of 330mA. The ...
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191 views

How to do I reenable display sleep?

I recently installed a Hyperpixel touchscreen on my Raspberry Pi 3, but I don't want to leave the screen on 24/7 to avoid damage and because an always-on display doesn't fit my use case. Before I put ...
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2answers
60 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 (...
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1answer
781 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
2k views

What logs can I check to see if WiFi power management is still enabled

I have followed a couple of posts on here to turn off power management, but every morning I wake up after rebooting my pi the night before, my wifi has stopped working. By stopped working I mean I ...
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1answer
3k views

Screen Blanking on console in Raspbian Stretch (Debian 9)

I've burned the new Raspbian Stretch Lite image onto a SD Card and use this as my development system. I was used to turn off screen blanking on the console by changing the BLANK_TIME in /etc/kbd/...
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2answers
366 views

How can you detect if a USB device is powered via an USB Port?

I need to power a Raspberry Pi through the USB port of another computer. Is there any way to detect on the PC if the RPi is powered on? Running dmesg as well as lsusb commands on the PC didn't show ...
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868 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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1answer
321 views

How to hack power bank with timer to power cycle Raspberry Pi

... without an Arduino (if possible). I am aware there are well-made solutions like the WittyPi, RTC-Arduino circuits, and some others with relay switches. If a power bank is directly connected to ...