Questions tagged [power-supply]

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

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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 ...
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1answer
45 views

Raspberry Not Powering Up

Hope you are all doing fine !! Actually I'm just a beginner with raspberry Pi ... I started doing python coding on it a few days ago. But now when I'm connecting my charger to it ,It won't start. ...
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1answer
1k views

Is it safe to power my external hard drive with a Raspberry Pi 3 B+ USB port?

I have a external hard drive that has written on it "5V ⎓ 1A". Both power and data transfer happen over a single USB. I have been reading about powering this hard drive with the USB ports on my ...
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2answers
2k views

Car Powered Raspberry Pi: Safe Shutdown and Power On

Apologies if this is a duplicate, but I can't seem to find a suitable solution. I need to power a Raspberry Pi in a car, and for obvious reasons need to shutdown gracefully, however, I need it to ...
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1answer
901 views

Powering Raspberry Pi Zero when USB OTG is in device mode

I'm using a Raspberry Pi Zero as a USB device, i.e. it is connected and powered via the OTG USB port to a USB host (in this case another Raspberry Pi, but it could be a PC or any other USB host): ...
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1answer
945 views

AM2302/DHT22 power supply

The AM2302 (or DHT22) supports power supply between 3.3V and 5V DC. I have seen both possibilities in various tutorials, although it seems most people go with 3.3V. Is it preferable to supply it ...
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2answers
69 views

Raspberry Pi 3 Power Issue

I am using Raspberry Pi 3 Model B for my project purpose. The Pi 3 works fine when it is powered through a 5V/2A charger and I am able to use the inbuilt Bluetooth and Wifi using it, but when I try to ...
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1answer
42 views

Several Zero-W boards won't even light up

In the past, I had no trouble getting my first Pi Zero-W board to boot. Something seems to have happened, such that with: three different boards (two newly purchased, one old that I think was blown ...
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1answer
2k views

Outdoor Pi Security Camera

I'm hoping to make an outdoor Pi security camera. I don't want to run any wires so I'm hoping to get a Wifi connection along with solar power. I've been looking into the PiJuice solar as an option ...
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7answers
30k views

Powering without using the micro USB

Is it possible to power the device without using the micro USB? For example, is it possible to use PoE (Power over Ethernet)?
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5answers
8k views

Power Raspberry with LiPo battery

I have a LiPo batterery: EZ-power LiPo 4000mah - 2s 7.4 How could I power the Raspberry, I just know that Pi works at almost 5V.
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1answer
903 views

What is the max voltage that the Raspberry Pi can handle over the USB plug? [duplicate]

I've been trying to make my own lower-cost power supply for the Raspberry Pi (my cellphone wall adapters don't provide clean enough 5V power for the Pi 3B+) with a 12V wall wart I have laying around ...
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1answer
47 views

Don't start Pi on power connection

I've currently got my raspberry pi setup with a power switch that wakes it up from power off (using GPIO3) and shuts it down safely using a simple python script. Pretty basic stuff. The problem ...
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1answer
261 views

3.5 inch HDD case/rack with seperate USB connection?

I want to build a NAS with RAID 1 using two 3.5 inch HDDs. I want to connect the HDDs via USB. Thus I'd need two cases for the HDDs with two seperate power supplies. Cases/Racks with two HDD slots ...
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2answers
151 views

How long does a power interruption have to be to bring down a Raspberry Pi?

I'm working on providing a stable supply of 5V power to a Raspberry Pi over the micro USB input port. One possible issue I've noticed is occasional instantaneous dropouts when switching over from ...
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4answers
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Is there a code for the power LED blinking (I've noticed a pattern) or is it simply “blinking” and that's it?

I recently got my first Raspberry Pi (model 3 B+) plus a starter kit from Adafruit, and I have encountered my first challenge: boot the darn thing. The starter kit came with a micro SD with NOOBs ...
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113 views

RPi 3b+ portable battery concern: enough voltage?

For starters, I am trying to use this power pank as a portable battery for my robot: https://www.costco.ca/PocketJuice-12%2C000-mAh-Portable-Charger-.product.100416339.html I connected the pi to ...
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54 views

Possible to Power an IP camera from Pi

I have a raspberry pi 3 b+. I was thinking instead of using an USB camera or the camera module would it be possible to connect an IP camera? The raspberry pi will be powered by a battery and the pi ...
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1answer
268 views

External 12v power supply to relay

I have a 12v 8 channel relay https://www.modmypi.com/raspberry-pi/relays-and-home-automation-1032/relay-boards-1033/8-channel-12v-relay-module which I want to connect to my RPi3 so I need an external ...
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1answer
290 views

Using a molex powered usb panel to power multiple pi's

I have been looking into multiple ways to power numerous rapsberry pi's from one power source. I am not an electrical engineer and as such some methods I have researched online are less than ideal, ...
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8answers
22k views

Pi not starting up, no light

My Pi is not starting up. None of the lights go on. I've searched online for similar problems but couldn't find anything. HOW IT HAPPENED: I was controlling my Pi with my laptop using PuTTY. Then I ...
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4answers
1k views

What are the dangers of connecting the Micro-USB through an adapter straight to the mains?

I have a USB-Mains power adapter for charging up an iPod, which I thought I would use to power my Pi. It looks like this: with USB one side, and Mains the other. I was wondering if there are any ...
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2answers
471 views

Can I fix my bricked RPI3?

I've been having problems finding a good 2A+ power supply around the house that would stay above 5 volts but no dice. So I gave up and tried powering from a bench power supply to a variable dc-dc step ...
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9answers
72k views

What can I use to power my Raspberry Pi Zero with rechargeable battery?

Is there a 5 V rechargeable battery and cables compatible and comparative in size with Raspberry Pi Zero? I don't want to have to plug my Raspberry Pi in every time and nonrechargables get ...
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2answers
235 views

Raspberry Pi 3 B+ shuts down randomly [closed]

My RPi 3 B+ shuts down randomly. I have a official power supply and a 32 GB Toshiba microSDHC class 4 card. I'm using it as a host for a Discord bot.
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1answer
301 views

Can I give power 5V 2.1A to Raspberry Pi 3 B+?

I have already taken RPI 3 B + from post office and now I want start RPI 3 B +. But I'm seeing that I haven't got 5V 2.5A Power Block. So, I have a question. Can I give power 5V 2.1A to Raspberry Pi 3 ...
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9answers
269k views

How do I supply power through the GPIO?

I have seen some examples of people powering their Raspberry Pis by wiring a DC "barrel plug" style power supply to the 5V and GND GPIO pins. What considerations should be taken when doing something ...
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2answers
373 views

Powering Raspberry Pi and Arduino

I'm curious about powering Arduino Uno, Raspberry pi 3 b+ and motor driver L298n. I've got 11.1V / 2200 maH li-po battery. Firstly connected battery to motor driver, then feeded arduino from 5V out ...
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1answer
352 views

12V-to5V (3A) converter for car fuse box

I'm planning to setup a RetroPi (using Raspberry Pi 3) in my car with a direct connection to the fuse box with this 12V-to-5V (3A) converter module. The power requirements on the Raspberry calls for 5....
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1answer
88 views

Power from Pi 3 to 7" display

Does the 3v3 carried in the FFC cable at the display header of the Pi 3 B+ supply power to the 7" touch display? Or do I need to supply power at J1.1 and .5? If so this power can be pulled from the ...
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2answers
517 views

Powering Raspberry Pi using DC Power supply

I am trying to power my raspberry pi model 3 model b+ using this DC power supply. According to the official FAQ the power requirements seems suitable. But, I am not how to use the power supply to ...
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3answers
9k views

Raspberry Pi 1 Model B+ end of life?

TL;DR My Raspberry Pi (Model B+) can't run the newest Raspbian (Stretch), suspected is that the kernel doesn't work. Anything with a kernel version above 4.1.19 will fail to load. Does this mean that ...
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4answers
18k views

Current draw for +/2/3/0 models

Essentially "What's the current draw and supply voltage tolerance?" but for newer models.
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1answer
12k views

DIY uninterruptable power supply (UPS) for Raspberry Pi Zero

I have several pi-zero boards and I utilize them to monitor environmental conditions (such as humidity, temperature and intrusion) of each room in home. For continuous operation, I want to eliminate ...
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2answers
335 views

Is it safe to use this battery with the Raspberry Pi Zero?

I have two questions actually: 1) is it safe to use this battery and these wires with the raspberry pi zero? 2) if yes, where do i solder the highlighted (red square) ends to the zero board?
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2answers
2k views

Power Raspberry Pi 2 From vehicle battery

I have seen many tutorials and blogs of people setting up their PI 2 in their vehicles for media systems etc. I would actually like to attempt the following however I am unsure how to power the pi. I ...
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7answers
69k views

Undervoltage warning despite decent power supply

I found some related questions about this, yet no answer. Using a freshly bought "5V/2.1A" rated power supply, I get undervoltage warning icon on both my Raspberry Pi 3s. I measure 4.75V at the USB ...
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1answer
212 views

Zero W: Cut USB power lines?

I understand that the Zero W USB port has just the power lines connected to all the power on the board (+5V and GND). I also understand that you can use something like Adafruit PowerBoost 1000C to ...
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1answer
99 views

Can i use 2.5Amp on Raspberrypi 3B GPIO 5v pins? [duplicate]

I'm thinking of using a 5V and 2.5Amp power supply to power up my Raspberrypi 3 model B over it's GPIO 5V PIN. Is it safe to use 5V 2A IN GPIO PIN?
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1answer
216 views

How to power Raspberry Pi from a lab power supply via USB?

How can a Raspberry Pi be powered from a lab power supply via USB? I have a lab power supply that can easily output 5 V/4 A and I would like to use it to power a Raspberry Pi (version 3B and 3B+). ...
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1answer
56 views

Prevent Pi Zero W from turning on after receiving power

My Pi Zero is powered by a small ATX PC power supply that is also powering a few other components: projector, audio amplifier. I'm using the gpio-shutdown device tree overlay to add a power button on ...
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4answers
3k views

Helping the Raspberry Pi to work on a weak USB power supply

I'm trying to power my Raspberry from my TV's USB port (originally intended to show pictures from an usb stick). It mostly works, but I get some random reboots, while it works perfectly with an ...
3
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2answers
2k views

Powering Pi and 3.5" HDD from one PSU

I am trying to build a mini computer that contains a Raspberry Pi and a 3.5" HDD, with built-in PSU so it requires only a single 120v input. I'm thinking about a PSU like the MeanWell PD-25A, which ...
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5answers
13k views

Preventing SD card corruption in the event of power failure

I have a project that uses Pi's in remote locations (roadside cabinets dotted around a city next to important bits of water infrastructure) to read data via USB from some specialised data collection ...
5
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1answer
199 views

Pi shuts down every day at 11:23 PM

I have a Pi Zero W running Raspbian Stretch Lite (June 2018). I'm using it to turn the crank on an automatic cat feeder. I've barely changed the base configuration: apt-get-installed git and samba, ...
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3answers
16k views

Official Raspberry Pi 7 inch display power consumption

I bought the display along with the camera board v2 a couple of months ago to work on some projects with my Raspberry Pi 2 but only recently found the time to actively experiment. Now unlike the ...
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3answers
13k views

What happens if you try to power a Raspberry Pi 3 with a <=1A charger?

I don't have a Raspberry Pi 3, but noticed that it says it needs a 2.5A power supply. I have a lot of the cheap <1A chargers at home. Can these power the Raspberry Pi 3? Also I guess I won't be ...
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2answers
409 views

Overcurrent protection

Are there any over-current protection measures on RPis? Either on GPIO or power supply pins. Are there differences between versions? Unfortunately two of my 3b+ boards are dead now because of brief ...
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2answers
709 views

Powering Motor with Raspberry pi and h-bridge

I am trying to control a 3-6 volt motor with a raspberry pi and h-bridge. I have a separate power source for my pi and my motors. I have tried a 6v, 9v, and 12v power source. However, the motor ...
131
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7answers
28k views

How can I run the Pi on Solar Power?

Has anyone successfully set up their Pi to run on solar power? If so, what would be the cheapest way to sensibly and reliably achieve this, using a combination of solar cells / batteries / voltage ...