Questions tagged [power-supply]

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

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1answer
16 views

Regularly power up an autonomous Raspberry Pi? (e.g. once a week)

I want to power a Raspberry PI from a power bank, which should give me - according to various sources on the Internet - 30 to 70 hours of operation. How can I power up the Raspberry Pi once a week to ...
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1answer
93 views

rpi kind of turns off (not accessible by ssh / vnc, red light on), var/log with regulatory domain

I am using a rpi3 with an external usb disk and a 3A power source, but the system seems to turn off after 1-2 days of normal use. I know that because I cannot access it (ssh or vnc), but there is a ...
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1answer
106 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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7answers
4k views

Powering Raspberry Pi 3 from another Raspberry Pi 3

Is it possible to power a Raspberry Pi 3 directly from another Raspberry Pi 3 that is powered from a Micro USB socket. I understand there is a 5v rail and I am thinking that linking the 5v rails ...
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5answers
784 views

Cut power on a remote Raspberry Pi 3 via another raspi

I'm building a system with a raspberry pi located in a very remote area connected to internet with an internet stick. The tests are promising so far but the pi freezes every here and then and I'm not ...
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1answer
118 views

Power Raspberry Pi and charge Adafruit FONA from same source

I have 12v leisure batteries hooked up to solar panels, I want to be able to power my pi (5V 0.7A max) and charge the Lipo battery for the Adafruit FONA (5V 2A max) for a combined 2.7A max (i think) ...
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1answer
126 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
214 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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1answer
86 views

Compute Module 3+ Power supply

I am designing power supply for CM3+ board and got few questions. I decided to use 2 LDO's (3V3 and 1V8 outputs both from 5V usb VBUS). Wanted to ask if its good solution or maybe connect 1V8 to 3V3 ...
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1answer
148 views

Despite having powered USB Hub, Raspberry Pi 2+ doesn't detect Seagate 1TB HDD anymore

I'm trying to set up a raspberry pi 2+ as an always on torrent box. I had it set up one time and it was working, but then when I turned it off and on again it froze on start up. After flashing the ...
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1answer
176 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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5answers
2k views

Choosing a Pi4 power supply

I'm trying to decide what is the best option for powering a Pi4. The specs mention for a minimum of 3A. Let's consider we would also like to connect a 2.5" drive to the Pi4. Could someone more ...
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1answer
95 views

Power Pack for RPi 3

Is there a popular ups power shield that can be used to with RPi 3? Ideally I would like to write some code in Python to monitor the battery status of the power pack and also still have access to the ...
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1answer
35 views

How to power on multiple LED through 3.3V rail ? (Power supply problem)

I'm trying to use the 3.3V rail to power up 10 LED (20mA/LED). I read that the raspberryPi could supply until 1A through this 3.3V rail, that's a lot more than needed when all the LEDs are powered on....
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1answer
294 views

Monitor Displaying “No Signal” with RetroPie at Powerup

I'm in the process of building a game console using RetroPie and a Raspberry Pi 3. I'm connecting the Pi to a monitor via HDMI, and I'm powering both using a power strip with an on/off switch, to ...
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0answers
26 views

Reboot issues when plugging other devices into power

Model: Raspberry Pi 3b+ Raspberry pi 4.19.66-v7+ Raspbian Buster July 2019 edition Offical PSU. I have an Arduino uno powering off one of the USB ports on the PI. Nothing else attached. I have my ...
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2answers
419 views

How Much Current for GPIO Power Supply?

I'm working on an audio project where the Raspberry Pi will be powered off the GPIO. I was trying this using an LM7805 voltage regulator to get 5v from the 9v power supply that is standard in a lot of ...
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1answer
217 views

Low power alert logo

While simple tasks like browsing web, a lightning bolt appears in the top right part of the screen. I'm using a 2A charger. Is this really dangerous, for the pi or the SD card or the peripherals ...
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1answer
47 views

Reporting undervoltage, accidental reverse voltage

I've got a raspberry pi 3b+ mounted in my wall with the official 7″ touchscreen, and after some time i noticed the symbol in the top right corner notifying that it does not get the voltage it's ...
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1answer
68 views

Can a Raspberry Pi 4 be used as USB gadget but draw power from elsewhere?

Assuming that the Raspberry Pi 4 is attached as a slave to emulate different devices/gadgets using the USB OTG functionality available on the USB-C port: Is it possible to power the Raspberry from ...
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1answer
90 views

How to choose a power source for Raspberry Pi 4?

I bought a R-Pi some days ago. We all know raspberry pi needs 5V 3Amp to operate. I have these options for the power source: I have an SMPS (Detached from a Desktop PC) which have 5 V and 15 Amp ...
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1answer
133 views

part incompatibilities

I am trying to control a 4.5V motor with a pi. I am going to use this to control the motor: https://www.ebay.com/itm/2X-L298N-Dual-H-Bridge-DC-Stepper-Motor-Driver-Controller-Board-Arduino/...
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15answers
546k views

How do I turn off my Raspberry Pi?

Should I just pull the plug? Or is it best if I exit LXDE and any other running processes first?
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1answer
120 views

How to make a splitter cable for the USB2 OTG port on the RPi 4B?

According to the answer to Where is the USB2 OTG port on the RPi 4 Model B located? the Raspberry Pi 4B has a "hidden" OTG port in the USB-C power connector. I found at Very simple OTG on pi4 and at 4 ...
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1answer
30 views

powering raspberry pi zeroW via computer usb port

I ran out of wall plugs for the Pi and I would like to power a zeroW via a USB port from my laptop. There are 2 microusb ports on the zeroW should which 1 should I use, the one near the edge or the ...
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1answer
40 views

Whether using a 3.4 Ampere adapter or Qualcomm QC 3.0 adapter to power a Raspberry Pi 3B+ can cause damage? [duplicate]

So here it goes,after looking out hundreds of pages regarding powering of Raspberry Pi 3B+ still some hesitations here. I have totally read this out very detailed & nicely written answer by ...
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1answer
547 views

Powering 12v and a Pi from the same battery

I'm building a game that contains: rpi (5v) 2x 9g micro servos (5-6v) 5m RGB led strip (12v) Right now I use 3 different sources: 4xAA battery packs (6v) for the servos 8xAA battery pack (12v) for ...
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1answer
959 views

Raspberry Pi Low Power Warning

RPi Model B+ Raspbian 7.11 Kernel 4.14.41-v7+ I've been getting low power errors during startup (lightning bolt), and continue to see them in my syslog. I have tried multiple different USB cables, ...
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8answers
7k views

What is the highest voltage from the power supply a Raspberry Pi 3 B can handle without getting damaged?

I am using Android things on Raspberry Pi 3 B with a 7-inch touch screen. Currently, I always see a yellow thunder bolt sign on the screen which means that the Raspberry Pi isn't receiving a high ...
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2answers
49 views

About Power supply for Pi 4b [duplicate]

I have bought Pi 4b but now I don't wanna buy separate power adapter for it, I already have 5V,4A power adapter of my smartphone so can I use it for Pi 4b also??
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0answers
24 views

RPi 3B power supply and external USB Hub issue

I am building a project with a custom USB hub attached to one of the RPi USB ports. On the custom hub I attach 7 USB devices powered by their own batteries. The custom USB Hub is equipped with an ...
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2answers
38 views

The best way to connect the 7” touchscreen

I have a pi 3 model B+ and the official raspberry Pi PSU, and the official 7” touch screen. I’m running Raspbian with all the latest updates. I have connected the display using a USB cable as ...
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2answers
32 views

do RPi3 3.3/5V pins output constant voltage even if the RPi power supply is changing voltage?

I want to power my RPi with a lithium ion battery. The RPi will be powering some devices which require constant voltage to power them. If I use a battery as supply for the RPi (which changes as it ...
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2answers
182 views

powering the RPi 4 + a 2.5" HDD with 1 power adapter

Ok, so here's the problem: I want to build a RPi 4 machine for gaming. From what I've read, if I want to attach a 2.5" HDD via usb 3.0 to the Pi 4, it will have to be powered somehow, since the Pi won'...
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1answer
798 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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1answer
100 views

Pi 3 w/Pisound - Won't turn on unless wait a few minutes

I have a Pi 3 and Pisound (hat) and to turn it off I just unplug the cable. Now oddly, if I plug it back in right away I just get a red light, no blinking yellow BUT If I wait a few minutes to plug it ...
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2answers
3k views

safeness of using 18650 + battery casing for raspberry pi

I am planning to use a 18650 battery and a casing like below to run a raspberry pi zero W outside on my watch, but I hear bad stories about lithium ion batteries, like 18650, exploding on a regular ...
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1answer
77 views

Battery Usage Pi Zero W for video stream

I am trying to do live video streaming from the rasberry pi, meaning the camera is recording a video and then transmitting the live video over wifi. What is the smallest battery I can use to power ...
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1answer
3k 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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0answers
76 views

power supply for multiple raspberry pi4

I am wondering if any one knows of a power supply that will power 4 or more raspberry pi4 with the type C plug? (Yes I would like the full 3 amps or more) I thought of a standard ATX power supply, ...
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3answers
399 views

Powerbank Qualcomm 3 fried my Pi Zero W

I tried running a Pi Zero W on a 10000 mAh powerbank with qualcomm quickcharger capability (https://www.biltema.se/kontor---teknik/mobiltillbehor/powerpacks/powerpack-10000-mah-2000041816) . The ...
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3answers
2k 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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2answers
54 views

Voltage drop when RaspberryPi boots

Im trying to learn robotics with raspberrypi but im having a problem. I have 6 AA batteries in a batteryholder that are connected to a breadboard and with M-M jumping wires its connected to a LM2596S ...
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1answer
58 views

Powered USB3 Hub vs USB3 Y Power Cable

I have an issue that means I have to use a powered USB hub for the HDD that is attached to my RPI4 (long story). The hub just broke. My budget doesn't allow for a decent powered USB3 hub BUT does ...
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2answers
290 views

Power Rasberry Pi Zero W using LiPo 11.4V and 7805 converter

In order to power a Raspberry Pi Zero W, I'm using the 7805 converter to lower the ~11.4V from a LiPo Battery to 5V. The resulted voltage is about 4.96V. The Raspberry Pi starts to boot for about 20 ...
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2answers
71k views

Raspberry Pi Power Limitations

There are very many, often contradictory, claims about the power requirements and limitations of the Pi. What are the exact requirements?
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0answers
45 views

RaspberryPi is not provided with enough power

Im trying to learn robotics with raspberrypi but im having a problem. I have 6 AA batteries that are connected to a LM2596S adjustable voltage regulator module, Which then is connected to the ...
2
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3answers
1k 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 ...
0
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1answer
177 views

Can I supply power with 5V 2Amp to Raspberry pi 4 [duplicate]

Can I supply power with 5V 2Amp to Raspberry pi 4? Currently 5V 3Amp chargers by Raspberry Pi are out of stock , so I am using phone charger with 5V 2Amp along with Type C adapter.
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2answers
70 views

Should I tear apart USB PSU or get a dedicated switching PSU?

I'm going to be using an Pi-3B+ to switch an AC and a DC device using one of the popular relay modules. This whole project is going to go in a custom screw-together project box that will have AC input ...