Questions tagged [power-supply]

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

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2
votes
1answer
470 views

Raspberry Pi 4 with Anker PowerPort Speed 5

So I'm thinking of getting a Raspberry Pi 4 and I know they have raised the power requirements to 5v 3amps, rather than buying the offical power supply would using the two blue fast charge ports on my ...
2
votes
2answers
3k views

Raspberry pi 3 b+ and 7" touchscreen over poe

I have an issue, i want to power my pi and 7" touchscreen over poe but the raspberry pi poe hat supplies only 2.5 amp. 7" touchscreen requires 2.5 amp and rpi 3 b+ also requires 2.5 amp so i am in ...
7
votes
2answers
2k views

Can I use a DC-DC step up module to power a Raspberry Pi from 2AA batteries?

I understand that I can use 4AA batteries and a step down module to get 5V and power the Pi, however briefly. However, now I'm getting real outrageous and want to trying powering the Pi from just 2AA, ...
-1
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2answers
89 views

How can I wire a separate battery pack and control it with the 40-pin GPIO?

I am building a high altitude balloon and I need another way of bringing it down besides the balloon popping. I would like to regulate a battery pack with the GPIO on the Pi in order to heat a ...
0
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1answer
101 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 ...
2
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1answer
91 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 ...
0
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1answer
94 views

Is it okay to power the Pi Touchscreen by plugging into the Pi?

I have the official raspberry Pi 7 inch touch screen, and I have mounted to it a Pi 2. Lately I have been using it and I have been plugging the power into the Pi itself. I however recently remember ...
0
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1answer
115 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) ...
0
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0answers
22 views

LCD Installation freeze because of low voltage?

i try to install my LCD 3.5 waveshare, but when extracting the folder and use sudo ./LCD35-show it starts shortly and then freeze. I Got the thunder icon and the freezed screen. Might this be the ...
1
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2answers
69 views

Pi Remains Running When External (Powered) HD is connected

I have a Pi3B+. Attached is a (powered) Western Digital My Book external hard drive. When I accidentally unplugged the power to the Pi, it kept running, happy as can be with the only other energy ...
0
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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 ...
3
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2answers
110 views

Power up a raspberry pi in a plane

Just wanted to know if it was possible to power up a raspberry pi 3 (+7'' touch screen) from the USB socket you can find next to the screen in a plane. I have no idea how much power they provide...
0
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1answer
210 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 ...
1
vote
1answer
308 views

accidently reversed polarity power to Raspberry Pi 3B+

I was trying to make a custom power source to supply power to the micro usb port on the Pi B+ and I reversed the + and - by accident and then smelled something like burned plastic. The SD card doesn'...
2
votes
1answer
143 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 ...
0
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1answer
168 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 ...
0
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1answer
79 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 ...
0
votes
1answer
5k views

How big of a power supply do I need to power a 3B+?

This chart shows the Pi 3B+ drawing upwards of 5.6 W under load. I know they recommend a 2.5a power supply, but is that an exactly accurate number? Would 2.4a be enough? How powerful of a power supply ...
1
vote
1answer
285 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 ...
0
votes
2answers
414 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 ...
0
votes
1answer
212 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 ...
103
votes
11answers
138k views

How do I build a UPS-like - battery backup - system?

As we all know, the Raspberry Pi doesn't really use that much power (5v + 700mA is the spec). I'd like to build a battery backup for power outages in a DIY-ish fashion. I don't need surge protection ...
0
votes
3answers
337 views

RPi3 show under voltage warning while input voltage seems good

I'm designing an embedded system that will be based around a RPi3, combined with the official touch display. In working out how to power the device, I'm getting stuck because the Pi I'm using keeps ...
2
votes
3answers
886 views

Shutdown properly when power-supply can't supply anymore

I've been through tags "power-supply" and "power" of this website and surfing on a lot more but I did not found any answers or information about the subject I'm about to talk about. So, I'm looking ...
1
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0answers
97 views

Safely connect Adafruit's powerboost 1000C LBO to rPi-GPIO

I would like to connect Adafruit's powerboost 1000C LBO control pin to a rPi GPIO-pin. So I can gracefully shutdown my rPi when the LiPo runs low. I would like to connect the LBO to a diode to lower ...
1
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0answers
26 views

can low power be the cause of low WiFi speed?

I'm using a raspberry pi 2 model b running Ubuntu core, and a TP-Link TL-WN821Nv3 USB WiFi adapter, which has a maximum speed of 300mbps/37.5mBps, and a Samsung charger which supplies 2A (lower than ...
7
votes
2answers
3k views

Compute Module 3 current/thermal profile

The Pi Foundation just announced the second iteration of the compute module, usefully called the Compute Module 3. In their press release they've dropped some fairly hand-wavey statements about the ...
1
vote
1answer
78 views

Raspberry Pi Shows Low Power Lightning Bolt When Only Using 1 of 3 Amps

My Raspberry Pi 3B+ is running Kali Linux on the official 7" display. I am using an Anker power bank that says: "5V=6A (3A max per port)" in the description. When using the Pi, it constantly shows the ...
0
votes
0answers
103 views

HDMI port is not working

I have been using an RPI3B+ for around 2 months . I used it remotely most of the time. Recently, when I was trying connect it with a monitor via HDMI to VGA converter , it didn't work at all. I ...
5
votes
4answers
4k views

How likely is SD card corruption?

I was working on my Pi and accidentally disconnected it from power. I have read that disconnecting power while the SD card is being written to can cause SD card corruption. How often does that really ...
0
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4answers
5k 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 ...
2
votes
2answers
72 views

Powering Rpi won't boot using custom microusb and supply

I'm attempting to power my Raspberry Pi with my own power supply. As you can see from the picture, that is the micro usb I have modified to connect to my power supply. However, when I connect it to my ...
-1
votes
1answer
55 views

Powering a line following robot with a power bank. Any thoughts?

I am currently wondering for a college project, if it'd be possible or not to use a power bank to build a line following robot and power both the pi 3b+, the waveform motor driver hat with 2 dc motors(...
2
votes
2answers
359 views

Safe power supply through GPIO pins

I'm designing a HAT and need to supply power to PI zero W and PI 3B+ through the GPIO headers[2&4]. The supply would regulated at 5V 4A (Would be sharing the same power supply with a Thermal ...
66
votes
10answers
122k views

How do I modify my Raspberry Pi to be powered over PoE?

Is it possible to modify the Pi, so that it can receive it's power via Power over Ethernet (PoE)? I would like to be able to power my unit via the ethernet cable, so that I don't have to worry about ...
1
vote
0answers
28 views

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 ...
0
votes
1answer
43 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. ...
4
votes
1answer
950 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 ...
2
votes
2answers
1k 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 ...
2
votes
1answer
809 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): ...
1
vote
1answer
865 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 ...
1
vote
2answers
68 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 ...
0
votes
1answer
38 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 ...
3
votes
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 ...
36
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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)?
3
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5answers
7k 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.
0
votes
1answer
421 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 ...
1
vote
1answer
43 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 ...
0
votes
1answer
190 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 ...
2
votes
2answers
136 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 ...