Questions tagged [power-supply]

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

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906 views

Powering Raspberry PI Zero W using IC 7805 Voltage Regulator

I want to know if its possible to power PI zero w using 7805 voltage regulator. Max current rating of 7805 is 1A. What is the max consumption of PI zero W? Would it require more than 1A of current? I ...
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0answers
885 views

Disable Power Over HDMI

I built a Retropie using a PI Model 3B that is powered via the GPIO pins. Specifically with this case which adapts micro usb to the GPIO power. Everything works fine except when I turn the system off. ...
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1answer
377 views

False-positive button press on power interference

I'm having a rather funny issue with GPIO & tactile switch. The issue is as I understand purely electric. My RPi is connected to a cheap usb "Extreme Style 5V 3.1A" PSU. Same power outlet is ...
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2answers
80 views

Why RPI need such a high current?

I am little bit confused. All my colleagues tell me that I need 2.5 or 3A power source. Indeed, it does not work with with "smaller" source. However, the general knowledge and this site (and many ...
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1answer
343 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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2answers
628 views

Pi keeps turning on and off when I have a number of USB devices

So I have a Raspberry Pi B+ - I've had it for several years now, which I think may be the cause of this problem, though I'm not sure how. Basically, it's fine when I have just a keyboard plugged in, ...
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2answers
702 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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1answer
1k views

Raspberry Pi 3: DC motor power supply problem

I'm newbie in electronics. I'm joining RPi's world through a starter learning kit but there's a wiring incongruity in DC Motor lesson: In the 1st image there's only RPi's 3.3V power. In the 2nd image ...
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2answers
6k views

Will an anker powerport+ work to power multiple pi's?

I'm not an electrical engineer so apologies for the rather basic question. I've found myself with multiple pi's and felt it was about time to look for some other power solutions other than powering ...
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1answer
4k views

Can I use my S7 edge charger for my Raspberry Pi 3 Model B?

I have no charger atm and I am a bit strict on money right now. Anyways, I have a spare Samsung charger and it has 2 values. 9V = 1.67A 5V = 2A It's a fast charger so I don't know what applies to ...
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1answer
136 views

Pi b+ power issues?

I have a raspberry pi b+ with raspbian stretch. My power adapter is rated at 5v 1.5 amp. I have a monitor and network cable connected, USB keyboard, USB mouse and 2 USB cameras connected via the 4 USB ...
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1answer
2k views

dtoverlay=gpio-poweroff not working on raspberry pi 3 B

Problem: I have a Raspi 3B rev: a02082 (Q1 2016 3 Model B 1.2 1 GB (Mfg by Sony)) running raspbian jessie kernel 4.9.35-v7 I want to signal to a power management circuit that filesystems ...
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1answer
168 views

Torrentbox Hard Drive keeps unmounting when copying files. How to avoid it?

My external hard drive is connected to a powered usb hub (5v 3000mA) then connected to rpi3. Whenever I copy any file that would take more than 30 sec, it would unmount and I have to mount the next ...
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2answers
190 views

Multiple problems with my Raspberry Pi 3

I am not new to the Pi 3 and now have it for quite a few months now. However, I started to face multiple problems: My pi 3 would shut down and restart when I was working on it. At a time, only the ...
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1answer
246 views

Official 7" Display not functioning correctly

The first day I had the display, it booted fine, loaded and worked just fine, however I had a little bit of flickering from the screen. Today I tried to boot again and the screen comes up with some ...
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3answers
2k views

How many MAX7219 8x8 can a Raspberry Pi 3 power?

I'm trying to figure out how many MAX7219 8x8 LED matrix can a Raspberry Pi 3 handle without the need of external power. I would like to connect an array of 8 but I suspect I'll need an external ...
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1answer
1k views

Moto Turbo Charger for Raspberry PI 3 Model B

I have recently brought Raspberry PI 3 Model B, however still don't have power supply which give output as 5V and 2A min. Moto Turbo Charger output read as Standard - 5V/2.85A Turbo1 -9V/2.85A ...
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1answer
109 views

With the Pi Zero W plus a 2.4A adapter, can I safely draw up to 2A from the 5V pin?

Since the Zero W doesn't have a polyfuse, am I right in assuming that the 5V pin can safely supply whatever current the power supply puts out minus the draw from the Zero W board itself (and any ...
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2answers
236 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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1answer
198 views

5.6V with official touchscreen [closed]

As I mentioned earlier I am getting low power warnings with a 5V adapter, and have now obtained another one that says 5.6V. Am wondering if this might work, or if it will damage the Pi and/or the ...
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0answers
258 views

Using Raspberry Pi with Powerbank Accumulator

I wanted to power my Raspberry Pi 3B plus some sensors and an additional Huawei modem with a Powerbank. When turned on that's no problem, everything works fine. But I want to measure some enviromental ...
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1answer
54 views

Boot only with usb cable energy

My raspberry worked fine with a 5V-2A charger. From few days, It boots only with the energy coming from the USB cable from my computer. If I use the usual charger, it goes in a boot loop, displaying ...
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3answers
2k views

Low power warning using touch screen

I have a RPi 3 and a 7" touch screen, powered by a MW GS18E05 adapter. It says output 5-6V, 3.0-2.5A, max 15W. The top right corner yellow flash low power warning shows up when I boot and then it ...
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36 views

Power Draw Requirements for multiple components and PI

I am building a rover, that ideally I would like to power from a single 12V Marine Battery. The battery provides power to all the components: Pi3 through a Power Converter 12V LED computer monitor, ...
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1answer
44 views

How can I limit the power from a battery for my RPi3? [closed]

I am taking an old HP G62-407DX apart, and I have replaced the motherboard with a raspberry pi. With some help on Superuser, I figured out what the display used. Now, I would like to know how to limit ...
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1answer
210 views

Can someone explain what backfeeding is and how I can protect my Pi from it?

So I read something about "backfeeding" and that it can damage my Pi. What exactly is it? I didn't understand the article. BTW, I'm a complete noob so please try to be as un-technical as possible. I'...
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1answer
6k views

Powering Raspberry PI With Broken Micro USB Connector

The Micro-USB port has been brutally ripped off from the PCB on my Raspberry Pi along with traces connecting it. I know that I can power the device from GPIO 5V and GND, but there will be no ...
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5answers
10k views

Powering a RPi with +24VDC for an industrial application

I need to Power an RPi from a +24VDC industrial power supply. The RPi is mounted in a DIN-rail mounting box, in which there is plenty of space. The +24VDC is quite reliable and does not vary by more ...
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3answers
1k views

Will a power bank short circuit a raspberry pi?

I was wondering if I could make my raspberry pi portable with a power bank however, I think it might short circuit the motherboard and then that would mean bye bye raspberry pi. Is it save to use my ...
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1answer
354 views

Power Supply for Raspberry Pi Model b [duplicate]

I recently bought a Raspberry Pi 3 and forgot to buy the power supply. Could I use a phone charger (1.5v, 0.75amp) to power the Raspberry Pi 3?
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2answers
1k views

Two power supplies for RasPi and SSD. Does it work?

I'm planning to connect some old SSD what I've already to my RasPi3B. I ordered cheap SATA-USB adapter cable from ebay. It has two USB-a plugs, one is for data and power another is only for power. ...
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38 views

2 Raspberry Pis 1 Battery

I'm working on a project, here's the deal... I have 2 raspberry pis (3B, and a zero w) and 1 battery (3.7V LiIon 1200mAh). I bought a PowerBoost 1000 (A "DC/DC boost converter module can be powered by ...
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0answers
27 views

Question about Power supply for Raspberry Pi Zero W V1.1 [duplicate]

I recently got a Raspberry Pi Zero W V1.1 as a gift....and I'm a bit confused about the power requirements for it. I have a 5V~2A mobile-charger and a 5V~1A mobile charger. Can I use any one of the ...
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0answers
104 views

Accidentally fed 12V to the 5V-pin of Rpi2 [duplicate]

After it happened, smoke comes out near the micro USB port of the rpi. I replugged the power supply of he rpi but this time, the power LED(red) doesn't turn ON while the green LED keeps on blinking. ...
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3answers
2k views

rPi2 model B v1.1 smoke comes out near power port

I am trying to control 2 motors using the E-gizmo Motor driver shield but suddenly smoke comes out near the power port of the raspberry pi 2 so I immediately unplugged the power supply. After that, I ...
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2answers
109 views

Uninterrupted Power Supply needed for Raspberry Pi

We have designed multiple temperature sensors. its executed as well too. but we need external power supply or Uninterrupted Power supply for Rpi. I have chosen power bank ..but it works with only one ...
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1answer
9k views

How to make a simple, reliable 15-second UPS for shutdown?

Use case: On power loss, the pi is to gracefully close all I/O (already kept to a minimum) and shut down, to be manually rebooted later. A supercapacitor works (I think; not sure of voltage near the ...
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1answer
107 views

Monitor misbehaving with stock power supply [closed]

I just bought a Raspberry Pi 3, bundled with the stock power adapter. When I use this power supply, the computer monitor I've connected to the Pi through HDMI is constantly turning on and off in a ...
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3answers
4k views

Using a quickcharge power brick to run a Pi 3

I usually use my phone power brick (rated at 5v 2.5Amps) to run my Pi 3 and it works fine for the most part. Now I bought a new phone which supports something called fast charge. So the power brick ...
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1answer
54 views

RCB trip / switch-on can cause Pi to brick?

I have a Pi which is powered by a (official) Pi Power Adaptor (from Amazon). A few days ago, an electrician working in my hose switched off (by accident) and turned an RCB back on. I believe that ...
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0answers
273 views

How to determine if a USB power supply is safe to use with a Raspberry Pi?

I have a Raspberry Pi 3 that appears to have been destroyed this morning. I purchased a no-brand USB mains charger suitable for UK use (and CE certified) from eBay, and I am almost certain that was ...
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4answers
112 views

Phone power pack for Pi

Is it a bad idea to power a Pi 2,3, or zero from a mobile phone power pack? I understand that Pi power consumption is as follows, *** Idle *** Raspberry Pi 2 B: 420mA Raspberry Pi B+: 230-240mA ...
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2answers
1k views

Power Raspberry Pi using two 3.7v Lipo batteries

I was having trouble while booting up my Raspberry Pi powered by LiPo batteries. Ignore the components inside the blue circle I am just connecting the batteries, the darlington transistor and the ...
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1answer
142 views

I cannot run rpi 3 from 8 battery (14500)

I cannot run rpi 3 from 8 battery (14500) Series circuits 29.6v. I am convert 29.6v through dc-dc converter (XL4005 DSN5000) to 5v. The converter output can be 5A. But I cannot take more than 0.5A ...
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1answer
159 views

Powering the PI over micro USB with a dumb (PC) power supply?

This is related to some existing questions (eg Powering without using the micro USB), but they don't make clear one specific part. I want to power a Pi from a PC power supply's 5v rail, but I'll do so ...
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1answer
208 views

How many amps does a pi with 11 sensors need?

I have received so much support from this community by reading already answered questions. But now I got one that hasn't been asked yet. I have nearly a dozen sensors connected to my pi 3 so it's only ...
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3answers
23k views

Can I power a Pi through a 5V pin?

The PIN mapping of the Raspberry 2B says: The red ones are 5V pins. Are these just used as 5V out pins when power is connected through Micro USB? Or is it also possible to power the Raspberry Pi via ...
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1answer
267 views

Creating a timelapse camera system in the Arctic using a Pi Zero

I am pretty much a total beginner when it comes to Raspberry Pi's and everything associated. Thus, I am relying on the people in this Forum to help me out:) I have a project in Greenland for which I ...
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1answer
77 views

Power required to run multiple appliances at once

I have an electronics question. I am no electrician and am trying to build an alarm pi Mark2. Currently I have a 12v power supply running through a relay which the pi turns on and off to trigger my ...
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1answer
81 views

How to power an RPi Model 1A with my Mac?

I have a MacBook Pro and a Raspberry Pi 1 Model A. I'm just trying to power the RPi (I need a power source). I've searched hi and low, and the best/easiest solution seems to be finding a USB A male-to-...

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