Questions tagged [power-supply]

The methods for powering the Raspberry Pi (typically via its micro-USB connection.)

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Power Pi Pico by applying 5 V to VSYS—any experiences with or thoughts on additional safety measures?

The official Pico datasheet chapter 4.5 suggests using either a Schottky diode or a P-channel MOSFET (P-FET; or a combination of both) when powering the Pico from an external power source (at least if ...
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3 answers
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RPi can't boot up from battery, needs to be connected to usb-c then while the battery is connected disconnect power supply usb-c

I have noticed that my pi will not boot from a battery (supplying 5.26v raspberry pi 4 model b) unless I first start it up from the usb c power supply and then connect the battery power supply. My ...
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Powering GPIO-interacting sensors with external 3V3

I am using a Raspberry Pi Zero, with an x706 PSU hat (2 x 18650 batteries). The X706 PSU is charged by a good quality, stabilised 5V power supply unit providing up to 3A. The Pi is hooked up to many ...
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How best to run a raspberry Pi 4 from a 12V DC supply

The Raspberry Pi 4B uses the USB-C input as its power supply. To the best of my knowledge a full power USB-C supply is 20V or is it any voltage up to 20V? If it's variable, is there a good way of ...
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Maximum power draw on Pi Pico 3.3V rail with USB power

The Pi Pico datasheet recommends a maximum power draw on the 3V3 pin (pin 36) of 300mA. However, the RT6154B datasheet indicates that up to 3A can be drawn when Vin > 3.6V, which is the case when ...
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Insufficient power for RPI + 7" Touch Screen

I have a raspberry pi 3B. It is connected to a 7" RPI Touch screen, (made by RPI). The screen gets 5v from the pi and the pi is connected to a 5v, 2.1A USB power pack. For some reason the power ...
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1 answer
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raspberry pi 3 B v1.2 not booting no led light and heating on the backside

I haven't used the pi for a few month now , it was stored in good condition. so yesterday i flashed the SD card with rasbian bullseye and booted up the pi. every thing was normal except the wifi , i ...
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1 answer
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Strange voltage on 3.3V pins

I have bought a new Raspberry Pi 4 and while troubleshooting connection to a DAC module I measured the voltage at 3.3V power pins. With reference to the pin header number as shown on the diagram below,...
-1 votes
1 answer
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Raspberry Pi 4 wifi intermittent latency drop

I'm running Ubuntu Server 20.04 headless on a Raspberry Pi 3 and 4. SSH connection is through a wireless router with only my laptop and the Pi connected. Pinging the Pi (192.168.0.215) shows the ...
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-1 votes
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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 ...
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2 answers
214 views

Do I need a on and off button for my power supply?

I purchased this power supply https://www.raspberrypi.com/products/type-c-power-supply/. It’s the official power supply so I thought it would be good. Now I am hearing all these stories about what ...
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1 answer
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Difference between Pi3 and Pi4 RUN headers?

I am trying to disable boot when pi4 plugged to power. I found some usefull answers, but that answers are about pi 3. I am using pi 4 and I must connect together 2 RUN header pins. In pi 3 RUN header ...
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How to disable boot when plugged to power? [duplicate]

I want to disable boot of raspberry pi 4B when plugged to power I have searched a lot and found a similar question, which gives a short and suspicious answer to this problem. If two RUN pins(holes) ...
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Is 4A enough for a NAS?

I have recently turned by Raspiberry Pi 4B into a small NAS. However, I noticed that the Pi disconnects from Ethernet from time to time. Whenever this happens (e.g. ssh not responding or Pi not ...
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2 answers
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Raspberry PI4 + Coral TPU + Telit LTE get "Under-Voltage"

I am using a Raspberry PI4 powered by the Raspberry power supply(5.1V,3A) and I have also a Coral TPU and a Telit Lte Modem attached on Raspberry USB 3.0 Ports Hub. According with the Coral Power ...
1 vote
1 answer
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3 12V DC motors on raspberry pi with L298N

Completely new to this stuff. For context, I am trying to connect 3 DC motors that probably are 12v. I haven't bought them yet, they will definitely be more than 5v. I want to be able to control all ...
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1 answer
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Raspberry Pi 4 WiFi and Ethernet stop working after a ribbon cable plugged in to custom HAT

I have been struggling with a strange issue where as soon as I plug a ribbon cable into a custom designed HAT (with nothing connected on the other end), the WiFi and Ethernet temporarily go down. My ...
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1 answer
58 views

Send power on/off/cycle command from one Pi 4 to another Pi 4 using GPIO (each having their own power supply)

I would like to control power of a Raspberry Pi 4 using another Raspberry Pi 4. Each Raspberry Pi is powered by its own official Raspberry power supply, to make sure each one gets enough power. It ...
1 vote
2 answers
299 views

Turn on pi at specific time with RTC to save battery

I'm looking into powering my raspberry pi via a powerbank. I already have a button and a relay to turn it on manually and when the pi shuts down flip the relay back to off position. Now I would like ...
1 vote
2 answers
51 views

How much overvoltage for a few ms

i'm trying to build a system with a Raspberry Pi and 2 switchable 5V DC Batteries (USB Powerbanks). I want to switch using Arduino and Relays. I would like to switch almost instantaneous, in order to ...
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1 answer
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Is it safe to power a Raspberry Pi Zero W with a Fritz!Box USB-port?

As many others im getting a Zero W for PiHole and i would like to power it using the usb-port of my wifi router. However, im concerned about undervoltage. I read the Zero W wants 1,2A, but usb 2.0 ...
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Sim7600 usb issues during GPS bursts

I have a RASPI2B+ connected to a LTE module SIM7600. In addition a wifi adapter RTL8188 is used as AP. I can connect easily with LTE network (AT+CNMP=38) but, when select GSM (AT+CNMP=13) it goes ...
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1 answer
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Calculating power adapter needs for my Compute Module 4 setup

So I'm finding it a little difficult to figure out how I should be powering my setup. I'll have Waveshares IO board here: https://www.amazon.com/gp/product/B08VJBGD1Q/ref=...
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USB power stay on after software shutdown?

When the RPi4 does a soft shutdown, it appears to leave power on to the USB ports. Is there a way to have the USB ports power off with the RPi? I’m building a project with a Waveshare touchscreen that ...
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2 answers
737 views

Can I power a Raspberry Pi 400 with a 5V 2.5A power supply?

I have Raspberry Pi 3 B+,and I'm considering upgrading to a Raspberry Pi 400. I understand that it is recommended to use a 5.1V 3A power supply, but can I use the 5V 2.5A supply I already have?
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Can sensor DHT22 be powered externally, and only read by Pi Zero W?

I am querying the DHT22 for temperature and humidity data, hooked on a Raspberry Pi Zero WH. My current setup works, and is as shown in the first picture, courtesy of the tutorial from PiMyLifeUp. ...
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151 views

Connecting the pi to a pixhawk flight controller

I am building a drone using a Pixhawk 2.4.8 flight controller. I want to add a pi with a picam to my build. I have followed this manual for connecting the pi to the controller. Therefore I have made a ...
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How to turn on a remote battery-operated Raspberry Pi (accessible by Wifi or SSH)?

I am running a cluster of Pi3 and Pi4. Each node runs on a battery and is powered by a solar panel, in a remote area like a farm with no grid. Pis are connected to each other by WiFi in a local ...
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2 answers
58 views

Undervoltage warning with original powersupply

I am running into the issue of getting the undervoltage detection on my Pi 3 B V1.2 while it is connected to an original psu (which provides 5.1V/2.5A). The psu definetly works as intended (I tested ...
2 votes
2 answers
487 views

Cut power supply to pi after shutdown and power on after button press

I am building a pi project that is battery powered and is powering something through the 5V GPIO. What I want the pi to do is to start up on a button press, do its thing and turn itself off again ...
2 votes
1 answer
533 views

RPi Zero 2 W monitor image lost during boot [closed]

TLDR: RPi Zero 2W outputs image only for a few seconds then stops My brand new Zero 2W is having issues with the monitor image. During boot I can see the init messages going by and at some point ...
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Powering a Pi 4 with a small power bank [duplicate]

For my project SamplerBox, I had done many extensive tests in the past and it was possible to successfully power a RPi 2 for multiple hours with such a small 2600mAh power bank (18650-battery inside), ...
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1 answer
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Power supply for this cluster?

I have this cluster, composed by: 1 Rpi4 Model B 2 Rpi3 Model B 1 Rpi3 Model B+ I don't neither the skills nor the tools/components to implement a DIY solution, so I would like to buy something that ...
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3 answers
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Is there any advantage powering up a RPi 4B with a PSU rated for 8A @ 5V?

I have a Raspberry Pi 4B 4GB RAM variant that will be running 24/7 with the following attachments: an ethernet cable leading to a router for internet connectivity a 2.5" external HDD attached ...
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1 answer
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Can I use USB 3.0 port to power RPI4 + external SSD?

On the Pi-4B, can I use one of the USB 3.0 ports for power, instead of the USB-C port? I will be powering the Pi-4, an SSD drive (Sabrent 512GB Rocket Nano), and a Conbee II — which btw currently ...
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4 answers
803 views

Low voltage warning powering Raspberry by means of power bank

I'm trying to power my Raspberry 3 model B by means a Catlyn Power Bank 10000mah just purchased and seems to work fine with an iPhone 11. The problem is that when I connect it to Raspberry, even if ...
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Is it safe to power Raspberry Pi Zero 2 W directly from computer?

A great feature of the Raspberry Pi Zero is that you can tether it to a PC, Mac or iPad Pro by connecting it directly to a USB port. It can act as a USB-Ethernet-adapter and you can ssh into the Pi. ...
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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 ...
1 vote
2 answers
80 views

Phone charger for powering Pi 4?

I just bought the Raspberry Pi 4 Model B 2GB RAM and I forgot my charger at my house which I won't be able to get to in a few weeks. I was wondering if I could power the Raspberry Pi using a phone ...
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Can I use a 3A/5V phone charge for powering my pi 4?

I have a completely fine and working type C charger with a stable voltage supply. The concern that I have is that my pi 4 is going to run 24/7 performing web scraping and analysis. Surely I have a ...
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Can you hack a regular Raspberry Pi 3 B (not the plus model) to work with one of the PoE Hats?

The regular B-model (unlike the B-plus) does not have the extra 4-pin header located new the ethernet jack that the various PoE(+)-HATs need. However, the nonplus B-model's ethernet jack does have a ...
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1 answer
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Power supply for stepper motor driver board

I'm doing a project where I wish to use 5 stepper motors simultaneously. I've ordered these (with driver board included) https://www.amazon.ca/gp/product/B015RQ97W8/ref=ppx_yo_dt_b_asin_title_o01_s00?...
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My Raspberry pi keep show msg : low voltage warning please check your power supply [duplicate]

I have Raspberry pi 3 , and I am using its power supply which give 5V -2.5 A , the problem is that the raspberry Pi keep show this message : low voltage warning please check your power supply
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1 vote
1 answer
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After shutdown/poweroff command, is it possible to damage a pi (4) by leaving the Powercable in?

So I have a Raspberry Pi 4 type C 5V 3A adapter plugged into the power extender thingy at all times. My question is, once you type the poweroff command into the terminal and see the device turning off,...
2 votes
1 answer
127 views

raspberry pi prevent overload current from turning on a high current motor

I am trying to use only 1 power supply instead of 2 to power Raspberry Pi and motor, but when I turn on the high current (>10A) motor, it will lead to the Raspberry Pi restarting. I guess it is ...
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2 answers
109 views

Dual Power a Pi from POE and USB input?

I have a Pi4 with the standard raspberry-pi branded POE hat, and it works fine. It is installed behind a monitor, which has USB ports. So I thought to add a USB-A to USB-C cable from monitor to Pi as ...
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Can I connect a Raspberry Pi 4B to an Arduino Power Supply Module? And if so, how?

simulate this circuit – Schematic created using CircuitLab I am trying to use an Arduino Power Supply Module to provide enough power to allow at least 5V and 10 mA through to an external supply. ...
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Standard USB C Power Supply and Overclocking

Is the standard (official) raspberry pi usb c power supply able to reliably supply a raspberry pi 400 with overclocked cpu and gpu? Meaning so that the pi gets enough watts to run at maximum speed ...
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2 answers
349 views

My raspberry pi is dead?

I have a raspberry pi 3 B that apparently stopped working after a thunderstorm. When it's plugged the red power led turns on but I can't boot the OS. I checked the voltage on GPIO pins and I get: 2....
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1 answer
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Powering multiple hdds to work with raspberry pi 4

I have a rpi4 with the default 5v 3A charger. However, when I hook up all my usb peripherals (2 mechanical hdd and a cc2531) I run into power limitations and things do not work properly. I am thinking ...
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