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Questions tagged [power]

Power is the rate at which energy is supplied or consumed, often measured in Watts. This tag covers electrical power specifically, the voltage and current specifications for supplying power to the Pi, the specifics of power consumption by the Pi, and methods for controlling Pi power consumption.

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how to power a raspberry pi zero w, with a 2x18650 bay, through GPIO

I'd like to wire this bay to the GPIOs of a rpi zero w. The bay welcomes 2S 2x18,650. On each cell is written "9800mAh TR 18650 3.7v Li-ion". My requirements are : One micro-USB port must ...
user131094's user avatar
2 votes
0 answers
165 views

Raspberry Pi Zero WH dead

I have problem with my Raspberry Pi Zero. When powering on with sd card inserted nothing happens, no LED is flashing. The os on the sd card is working on another raspberry pi. The problem occured ...
Patryk Cisło's user avatar
2 votes
0 answers
116 views

Low/Mid/High 230V Fan Control with RaspberryPI

I have fan 230 VAC 300 W, Relay SRD-05VDC-SL-C, and RaspberryPi, what other equipment i would need to be able to control Fan 230VAC with RaspberryPi? I want to go 0/1 with relay, and in mode:1, be ...
hkjz's user avatar
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2 votes
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349 views

Interfacing non bluetooth speaker with Raspberry Pi 3

I want a wired connection between speaker and Raspberry pi 3 Model B. Bluetooth or Wireless connection is not my requirement. Regarding my speaker - it should NOT simply output buzzer sounds but is ...
AlphaParticle's user avatar
2 votes
1 answer
46 views

power problem with pi4 and 7" touchscreen

I have a Pi4 that I have connected to a 7" touchscreen. The touchscreen is powered by a microUSB cable, the Pi4 is then powered through the GPIO, per the instructions. I keep getting the low power ...
Neil Petrunia's user avatar
2 votes
0 answers
78 views

Raspberry Pi HDMI blacking out and keyboard,mouse freezing

My setup consist a Raspberry Pi 3 model B running raspbian jessie. It is powered through GPIO header by a 5V, 5A switching regulator. I had a HDMI monitor, a flash drive and a USB hub connected with a ...
Chinthaka's user avatar
2 votes
0 answers
246 views

RPI 2 B died, PP9 test point should throw 1.8v and throws only 0.02v, how do I fix this?

Last night I unplugged it "unsafely" and today it doesn't start. What I get is a solid red light along with a solid green light. I have tried every possible combination (SD cards, Power supplies, OS) ...
Darío Sobrino's user avatar
2 votes
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724 views

What will happen if I Power-ON RPI simultaneously from GPIO Header Power pins and Micro USB?

What will happen if I Power-ON RPI simultaneously from GPIO Power pins and Micro USB? For RPI1,RPI2 & RPI3
jkengg's user avatar
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171 views

Computer PSU 5v Output direct with Raspberry Pi USB

I'm using an old power supply unit from an old computer (2011 HIPRO) to power my Raspberry Pi. I have measured the voltage across the terminals of the 5v output (Red and Black) and have proceeded to ...
James Marino's user avatar
2 votes
0 answers
63 views

Robot running off Raspberry Pi A+

I am participating in a competition where I need to make a motorized vehicle that goes a distance you learn immediately before competing. What I have in mind is to mount a Rasp Pi A+ and a motor to a ...
Router1011's user avatar
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759 views

Ext. HDD I/O Error - suspends, power issues?

My external USB HDD becomes repeatedly inaccessible after a long time of usage/idleness. The same thing happened before with a very old disk and I thought it was just failing. But I do have the same ...
Benjamin Maurer's user avatar
2 votes
1 answer
522 views

Rpi4B can control either one of two L298N modules, each driving two motors, but not both modules at the same time, why?

I'm using a pi 4 for a rover I want to build and I have 2 L298N drivers. I connected them using a breadboard to my pi so I don't need that much GPIO pins but only one pair of motors is working and ...
Fabian's user avatar
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1 vote
1 answer
132 views

Raspberrry Pi 4 doesn't display image

I just received my raspberry pi 4 and I've got a basic setup ready to go. However when I turn the Pi on nothing displays on screen. I've got a microSD with Raspberry Pi OS installed already. Here's ...
BlueJay987's user avatar
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0 answers
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wine: cannot find L"/home/lubuntu/.wine/drive_c/windows/Neko"

I am an unexperienced Linux user. I am trying to run an exe file in wine on live usb lubuntu 22.04 The problem is that when I try to run it from terminal by pasting the destination along with the ...
User lubuntu first october's user avatar
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0 answers
118 views

Raspberry Pi 2 model B HDMI no signal

I have a problem with my Raspberry Pi 2 Model B. It has Retropie installed and it used to work fine. Now my display says "no signal". What I tried after some research: Different cables and ...
Sebastian's user avatar
1 vote
1 answer
320 views

Power issue: USB 4G Modem via USB Hub

I am hoping to get some advice, below is the hardware I am using, Raspberry Pi Zero 1.7W (Raspbian OS Lite - 2022 Kernel) Ethernet / USB HUB HAT (B) Hologram Nova 4G Modem Initial power tests, I see ...
Beaker's user avatar
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1 vote
1 answer
786 views

Monitoring power consumption of a Raspberry Pi 3B+ device

I am wondering if it is possible to measure the power being consumed by the CPU core (ARM chip) of a Raspberry Pi? Specifically, I want to monitor this power consumption for various applications that ...
noobcoder's user avatar
1 vote
2 answers
741 views

Using a PD USB hub for power and data for Pi 4

I want to use a 7" LCD (not the official Pi 7" LCD) together with the Pi 4. According to the LCD documentation, it requires 2A. I was planning initially to power the LCD through one Pi. Now ...
Zaffresky's user avatar
1 vote
1 answer
454 views

Pi 4, Hifiberry, and touchscreen power

I recently finished my basement and am in the process of getting it all configured, and one thing I wanted was to build a Raspberry Pi streaming device. I got a 3D printer for Christmas and found this ...
Mosher13's user avatar
1 vote
0 answers
54 views

Turn off external harddrive bay

I have an IcyBox external hard drive bay with a fan, which is quite noisy. Seems like you cannot completely turn off the fan, even when the harddrives are all suspended. However, when I shutdown the ...
dba's user avatar
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1 answer
55 views

Power Monitoring Physics Experiment

Hi i am just planning a Physics experiment where i accelerate Ionized Gases onto a target sample. For this Experiment i need to monitor the power constantly over a week or longer. For my later data ...
weiserhase's user avatar
1 vote
0 answers
187 views

How to power PCA9685

I am using the RP 4B and am trying to control a servo with the PCA9685. Unfortunatelly I am very new to all that and therefore I don't know which specific components I need to power it up. I bought a ...
Infomagier's user avatar
1 vote
0 answers
44 views

Raspberry Pi seemed to have rebooted

I let my RPi on yesterday with several scripts open and running. But when I came back today, all the scripts were closed, like if the RPI rebooted. I read that Raspbian, contrary to Windows, is not ...
Dark Patate's user avatar
1 vote
0 answers
708 views

CM4 eMMC - safe shutdown / power supply schemes

I'm working on a design that uses a CM4 with eMMC and may (optionally) use an external SD card or USB stick for "user" file storage. The unit could (potentially) be hard powered-down by the ...
John U's user avatar
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1 vote
0 answers
416 views

Change the CPU Core Voltage from terminal

I was wondering if anyone is aware of how I can change the CPU Core Voltage of a Raspberry Pi using system calls from the terminal. I know that we can do this by setting the over_voltage parameter in /...
noobcoder's user avatar
1 vote
1 answer
161 views

How to physically turn the a Raspberry Touch display on and off?

I use a Raspberry Pi Touch Display that I connect like shown in the following picture to my Raspberry. The black and red wires are connected to thee GND and 5v pins respectively. Now I want to ...
SCM's user avatar
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1 vote
0 answers
292 views

GPIO input, keep high after button press

Hi was just wondering if there was a way of making a GPIO INPUT (connected to a momentary switch) stay high (for a certain amount of time), no matter how long the switch has been pressed for? The ...
OldGold's user avatar
  • 11
1 vote
0 answers
78 views

Physically turn the Raspberry Pi Touch display on and off with a switch

I use a Raspberry Pi Touch Display that I connect like shown in the following picture to my Raspberry. The black and red wires are connected to thee GND and 5v pins respectively. Now I want to ...
SCM's user avatar
  • 21
1 vote
0 answers
367 views

GPIO Power off on shutdown with retropie

i asked this question before but i have added a diagram to explain it more clearly. I am building a retropie arcade machine with a raspberry pi. I have added a shutdown / startup button to shutdown ...
user avatar
1 vote
0 answers
503 views

How to cut power to gpio pins on shutdown

I am working on a project where i am using a pi running retropie to make a homemade arcade machine. i have wired and coded a startup/shutdown button. i would like to set up the pi n such a way i can ...
user avatar
1 vote
0 answers
623 views

Pi-4b USB 3 no longer recognising Powered USB HDD Dock

TL:DR: Previously working setup now fails with no apparent hardware damage, nor deliberate software changes. My original setup had been working without problem since Sep 2019. I powered it down, ...
WSMWN4's user avatar
  • 11
1 vote
0 answers
459 views

Unable to turn on/off my LG-1500 projector via HDMI-CEC

I am trying (and failing) to control the power state of my LG PF-1500 projector through HDMI-CEC. According to this forum thread it should be possible. LG calls its implementation SIMPLINK, which I ...
packoman's user avatar
  • 111
1 vote
0 answers
1k views

Horizontal lines on video capture

There are random lines in my camera recording. I have this system running on a vehicle. I doubt the following three to be the reason. Help me identify the root cause. Vibration of the camera ...
55597's user avatar
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1 vote
0 answers
541 views

vehicles: power supply controlled by ignition with clean power off

I read a lot about this but I can't find a satisfying solution. I want the Pi to automatically power on when I start the engine and to cleanly power off when I turn it off. what I thought was to ...
Miky's user avatar
  • 171
1 vote
0 answers
86 views

How to power RPi with fan from single source?

Electronics beginner here. I have Raspberry Pi 4 GB variant. I have the following power requirements: power a 5V cooling fan 12V cooling fan (a spare cooler master)thanks @Milliways safely (i.e. ...
RinkyPinku's user avatar
1 vote
0 answers
922 views

Using USB-C on Pi 4 while powering the Pi via GPIO header pins?

I have an Pi 4 that I have setup as a router. I am using USB-C in Ethernet gadget mode to connect to my computer. I want to be able to disconnect and reconnect the Pi from my computer without it ...
Bogdan's user avatar
  • 111
1 vote
0 answers
102 views

UPS for Pi 3B and hdd

I'm quite new to the Pi world, but I need a UPS unit to power both a Raspberry Pi 3B and a 2.5'' hard disk used by the Pi. I thought a power bank could be the right choice for me, but I cannot find a ...
dcfg's user avatar
  • 111
1 vote
0 answers
796 views

power supply for multiple raspberry pi4

I am wondering if any one knows of a power supply that will power 4 or more raspberry pi4 with the type C plug? (Yes I would like the full 3 amps or more) I thought of a standard ATX power supply, ...
cybernard's user avatar
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1 vote
0 answers
420 views

Safely connect Adafruit's powerboost 1000C LBO to rPi-GPIO

I would like to connect Adafruit's powerboost 1000C LBO control pin to a rPi GPIO-pin. So I can gracefully shutdown my rPi when the LiPo runs low. I would like to connect the LBO to a diode to lower ...
participant's user avatar
1 vote
0 answers
55 views

can low power be the cause of low WiFi speed?

I'm using a raspberry pi 2 model b running Ubuntu core, and a TP-Link TL-WN821Nv3 USB WiFi adapter, which has a maximum speed of 300mbps/37.5mBps, and a Samsung charger which supplies 2A (lower than ...
Wis's user avatar
  • 111
1 vote
1 answer
79 views

RPI3 WiFi connection is established only when connected to the access point with a LAN cable

I can successfully connect to my RPI using SSH when the RPI is connected to a wireless access point and powered by a Xiaomi battery; but I cannot when I pull off the power and plug in the socket & ...
JYC's user avatar
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1 vote
0 answers
60 views

Long term screw terminal power

Okay so I have a PCA9685 hooked up to a raspberry pi 3 so that it can control multiple servos via a c++ program. Currently, I have them hooked up to a battery pack that has red and black wires as gnd ...
Richard Wei's user avatar
1 vote
0 answers
831 views

Connecting Raspberry Pi to old found TFT display

I have an old car DVD player sitting around that has a fairly decent secondary TFT LCD screen (hannstar 721h440b19-a1) that I thought I could use with my Raspberry Pi 3 Model B. I opened up the unit,...
Aaron Greene's user avatar
1 vote
0 answers
49 views

All files lost during long shelf time

i was using my raspberry pi 3 over ssh and doing a bunch of scripts, cron jobs, etc. then i stopped for a bit and shifted my focus elsewhere and my pi remained unplugged on my desk for a few months. ...
Guy Fawkes's user avatar
1 vote
0 answers
286 views

Automatically restart Raspberry Pi on Shutdown

I'm currently using a Raspberry Pi 3 B+ at a remote location and use a VPN and SSH to access the device. If the power unexpectedly goes out at this remote location (or more commonly I stupidly ...
Matt's user avatar
  • 11
1 vote
0 answers
520 views

Raspberry Pi Zero W and PowerBoost 500

I recently bought a PowerBoost 500 Basic, and I would like to know if it's enough to power a Raspberry Pi Zero W, running RetroPie or Recalbox, or if I need to switch on a PowerBoost 1000c. Also, can ...
KiRo_'s user avatar
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1 vote
0 answers
22 views

Cycle Power Contol

I am trying to create my own neon animation controller using raspberry pi. These are already for sale here: http://prosites-llcwccd.homestead.com/SPELLERS.html . But I want to make my own controller ...
Stephan Krasner's user avatar
1 vote
1 answer
836 views

Powering 3 HDD's with external power

I'm trying to connect 3 HDD's to my Pi3. They are 2x 3.5" and 1x 2.5", all powered with a external power supply: https://www.inateck.com/inateck-ua1001-usb-3-0-to-ide-sata-adapter.html It works if I ...
Spomsoree's user avatar
1 vote
2 answers
313 views

Lipo battery hat or attachment which supports seamless USB recharging

I just want to add UPS functionality to some of my flock of raspberry pis, and with an emphasis on portability. One of the ways to get this is with certain USB battery banks. I have one here that is ...
Steven Lu's user avatar
  • 291
1 vote
0 answers
606 views

Raspberry Pi 3 stopped working

My Raspberry Pi 3 suddenly stopped working only the red light led is on and nothing happens. I suspected the SD card so I swapped in another with only NOOBS on it and it worked once and not again. I ...
MtziSam's user avatar
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