Questions tagged [power-supply]

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

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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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Phone charger for powering Pi 4?

Good day, 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 ...
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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517 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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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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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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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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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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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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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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Powering raspberry pi using VGA port of a display monitor

Does anyone have an idea if you could use the VGA port of a standard display monitor to power the raspberry pi? Obviously you would need a 'VGA to USB' adapter but then would it be possible
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What happens when you overload the 5V pin on Zero W

I am trying to work out what will happen if I power too many NeoPixels from the 5V pin on a Zero. I understand from the Uberguide that this is the calculation required to work out the power draw: To ...
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Raspberry Pi 3B - Adding extra caps to make more stable power lines?

sometimes a flash on screen appears indicating power supply cannot deliver what Pi needs. Even when I have original power supply ( 3A) and total consumption of Pi doesn't exceed 500 mA. Maybe is power ...
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Raspberry Pi Zero W stuck in rainbow boot loop when connected to battery powered power supply

I found that my battery powered power supply was outputting 4.89V after checking it with a multimeter. Is this not enough to power a pi zero? When I plug the pi into the wall everything is fine. ...
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Diagnose USB hard drive problems

I have a Raspberry Pi 4B with 4 GB of RAM with the official power supply. Using an old HDD from a laptop I want to build a NAS. The HDD is a Hitachi Travelstar 5K750 750GB and connected with a SATA to ...
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Low voltage warning despite using official power supply tested at 5.2V

I bought the Official power supply but when I use it in my Pi 3 model B I get a warning saying: "low voltage, please check power supply". I have checked the voltage on the Pi using a ...
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How voltage tolerant is the RPi 3 A+ micro-B USB power connection? [duplicate]

I've been reading about power supply requirements for RPi and want to learn more about the practical limits in addition to the design limits. What is the power protection circuit (if any) on the micro-...
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pi 4 - Power present

I am using a pi4 and pijuice. Is it possible with a script or python to check if power is present in my Pi4?(usb port) I am using my pi4 headless with as a web server(online). I would like to know ...
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Are there further ideas for a repair of a 3.3V -> 5V shorted pi?

I accidentally shorted my pi's (3 B+) 3.3V and 5V GPIO-Pins. I was curious how to repair it and found this helpful answer. So I reworked the pi as described: Removed the broken MXL7704-R3, soldered a ...
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Upgraded from Wheezy to Buster and now having power problems

I was using a Raspberry Pi 2 B several years ago when Wheezy was the latest version. When I did a clean install of Buster just now and tried to use the Raspberry Pi with some peripherals in my ...
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Power consumption of APA102C LEDs when turned off? (Pimoroni Blinkt!)

I have the Blinkt! Module for my Raspberry Pi (https://shop.pimoroni.com/products/blinkt) which from what I can tell features 8 APA102C LEDs (Datasheet: https://cpldcpu.files.wordpress.com/2014/08/apa-...
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What power supply can I use for 2 servos?

I am a complete noob when it comes to raspberry. I have 2 servos MG996R that I need to power from an external power supply. Currently I am doing it from the board, and when I turn both of them the ...
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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 ...
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Avoiding voltage drops when simultaneously using multiple DRV8833 motor drivers

I am using three DRV8833 motor drivers. The power supply is currently a usb cable with the ground and power connected to a breadboard with the three motor drivers attached to them. When powering all ...
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Raspberry Pi 4 Undervoltage warning even with official AC adapter

My Pi 4 is relatively new and I previously used a 5V 3A tablet charger from an old Huawei device to power it without issue. Recently, a lightning bolt started appearing at the top right of the screen,...
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320 views

Use a usb-c charger with variable voltage for charging Pi4 [duplicate]

I have read here that is possible to charge you pi4 with 3rd party chargers that supply 5V 3A. I am wondering if I can use this 20W charger, which can deliver differnet voltage level (5V/3A, 9V/2A, ...
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MCP3008 Reading Values without Ground

I’ve been building a spectrophotometer the last few months and am confused by the ADC’s behavior regarding grounding. While everything appears to be working properly, including the ADC output, I have ...
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Can using a power supply having the correct voltage but an underrated current spec damage a Raspberry Pi?

I have read several similar questions which provide partial answers but leave me with some uncertainty. I am confident I understand that the answers say the probability and severity of damage to the ...

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