Questions tagged [power-supply]

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

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41 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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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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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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2answers
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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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27 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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1answer
44 views

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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2answers
34 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 ...
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87 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 ...
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136 views

RPi Zero 2 W monitor image lost during boot

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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1answer
58 views

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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3answers
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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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1answer
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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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4answers
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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 ...
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2answers
54 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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1answer
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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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1answer
59 views

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,...
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1answer
69 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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2answers
23 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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2answers
56 views

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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1answer
60 views

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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2answers
297 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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1answer
85 views

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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1answer
52 views

Is there a risk for the rpi to be under powered?

I power my RPi 3 from a Meross strip and I often get the small yellow lightning bolt in a corner that indicates that the RPi is underpowered. I know that this can lead to all sorts of issues with the ...
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1answer
116 views

How to troubleshoot VPN returning segmentation fault on a Pi Zero W or Did I fry my Pi?

My headless Pi Zero W gives a segmentation fault whenever I run the ExpressVPN application. This problem occurs on a brand new Sandisk Ultra microSD card, imaged with Raspbian Lite 32 bit via the ...
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1answer
53 views

Pi 4B not booting when powered via power pins on extension header

I used to power my Pi 3B and 3B+ from and external shield board of my design, which features 5A power source, connecting +5V to pins 2 and 4, and GND to 6, 14, 30, 34 and 39. It worked just fine, ...
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22 views

Is Raspberry Pi 3 B+ power supplier compatible also with Raspberry Pi 2?

It seems that my Raspberry Pi 2 power supplier stopped working (the power led switchs on and off periodically). Due to this I was wondering if my current Pi 3 B+ power supplier can be used also with ...
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3answers
55 views

How can I power a 4B from a DC power supply

I'm making a NAS with a Pi 4B, powered by a Meanwell RS-25 (5v 5a) psu. However, as far as I know, the Pi can only be powered via USB C, but the problem is all my breakout boards are limited to 500ma....
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174 views

Pi 4 doesn't recognise SSD

I bought new Pi 4 8GB from authorised seller including power cable. It recognises HDD and works fine. But it doesn't recognise SSD (crucial mx500 1tb sata 2.5-inch 7mm internal ssd). This SSD works ...
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2answers
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Static Shocks from RPi Issue

my first post here, so hope it's on-topic for the forum. Straight to the point... I have RPi 4-4GB running Astroberry for astro-imaging. The RPi is in the Argon ONE V2 Raspberry Pi 4 Case, and the ...
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3answers
176 views

power the logic circuit of an external component with an external power supply instead of the raspberry pi's GPIO

I want to know if is it possible to power the logic circuit of an external component used with raspberry pi not in the way shown below (using the 3.3v or 5v ang GRND GPIO), but with an external 3.3v ...
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70 views

Raspberry Pi 4b- powerbank measure

I want to power my Raspberry Pi 4b with a powerbank. I know that I need a 3A powerbank. The question is: How can I measure it? I want to get a percentage of it (which will be displayed over a website)....
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2answers
167 views

How do I interface 3.3 volt devices like (MCP4725 - DAC, A4989 - stepper controller, etc) to raspberry pi WITHOUT using its internal 3.3V power supply

I want to connect MCP4725 breakout to Rpi. The datasheet of MCP4725 says that "the SDA and SCL pins are open drain N channel drivers. Therefore they need pull-up resistors from the Vdd line."...
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2answers
83 views

What is the maximum power a Rpi4 can be fed?

I was using a raspberry power supply to power the pi in a setup for 3d printing, a camera and 5" lcd touchscreen run off the pi. I kept getting low voltage warnings so I purchased a 5v 5a power ...
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Turning switch on lowers voltage from 5.2v to 3.0v

This is probably a simple question, but I’ve researched a lot and haven’t been able to figure out how to fix the problem. Basically, I have a Raspberry Pi and a 5-inch LCD screen wired to a toggle ...
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1answer
628 views

Sainsmart 12V, 16 Channel relay module connected to RpiZW has unwanted triggering when booting

I'm trying to get the hydrosys4 open source irrigation control software to work with my 16 channel relay board and raspberry pi zero w. When the pi boots up the relay is triggered multiple times, ...
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1answer
73 views

Raspberry pi voltage between PP3 - PP27 is 0.01V is this normal?

I measured voltage using a multimeter between PP3-PP27 and it was fluctuating between 0.01V to 0.06V is this normal? The entire problem can be found here: USB ports recieving power but not working on ...
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1answer
40 views

What would be a good indication to see when it turned off?

my issue is around knowing when the raspberry pi is turned off so I can disconnect it from the power supply. H.W - Rev 1 B+ Details on LEDs: PWR LED - ALWAYS ON if POWER SUPPLY IS CONNECTED ACT(...
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303 views

USB ports recieving power but not working on Raspberry Pi 3B

I use external harddisk(connected via USB with its own power supply) to boot into dietpi on my raspberry pi. It works okay for a day(even with multiple reboots and poweroff). But the next day RPi ...
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56 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 ...
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1answer
153 views

Can USB ports blow polyfuse on Raspberry Pi 3B?

I suspect my RPi 3b polyfuse to be blown, but I don't know what's causing it. I'm using an external HDD for booting into DietPi with its own power supply and after every day or so all the USB ports ...
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2answers
88 views

Does Raspberry Pi 3B have polyfuse? Can USB ports blow polyfuse? [duplicate]

Does Raspberry Pi 3b have polyfuse? If it does, under what conditions can it be 'blown'? I suspect my RPi 3b polyfuse to be blown, but I don't know what's causing it. I'm using an external HDD for ...

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