Questions tagged [power-supply]

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

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4answers
117 views

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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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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0answers
47 views

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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2answers
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 ...
0
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1answer
100 views

Mirabox Capture Card and External Power Source

I'm looking to power my Raspberry Pi 4B from a 12V tractor battery. I have a buck converter which can be found here. I am considering using this device to step-down the battery voltage and hook up the ...
0
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0answers
39 views

Buttons connected to uart including standby/power button

I have a electronics project (32x32 pixel LED panel) with a Raspberry PI as a computing unit. This device has a self made PCB with holds 2 voltage regulators, one for the onboard micro controller (...
2
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4answers
6k views

Supply 3.3V via GPIO header (Pi3)

I need to power a Raspberry Pi 3 via its GPIO header: I have a beefy regulated PSU capable of providing stable 4.98V, which I planned to route to the 5V pins of the Raspberry as stated in this answer: ...
1
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2answers
35 views

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-...
76
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2answers
97k 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?
2
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3answers
57 views

Is it okay to use my Raspberry pi3 in low power?

My raspberry always flashes the lightning icon and there's a warning a saying that. Is it okay to use my Raspberry pi on that condition? Can it damage the raspberry? I don't have an official power ...
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35 views

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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1answer
39 views

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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1answer
40 views

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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3answers
48k views

Raspberry Pi 3 Model B+ Stable Red Light When Powered Up

I recently got a new Raspberry Pi 3 Model B+ and I managed to flash the OS. But the problem seems to happen when I try to boot it. I do not have the official adapter, but I tried the following: with ...
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2answers
2k 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 ...
0
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4answers
205 views

Power Requirement for Pi 3

I have a Raspberry Pi 3 Model B, and I wish to make a tablet with it. I am using the WaveShare 7inch touchscreen, the pi camera V1, a USB hub and an external CD/DVD drive. But when I got everything ...
0
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1answer
34 views

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-...
0
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1answer
43 views

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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2answers
48 views

Shields and access/share of power supply for fan

Deconz Raspbee II, Dresden Electronics shields occupy 10 pins of Raspberry PI, including all 5 V / 3 V. At same time the DIN casings for Raspberry PI do often provide, a fan that needs a power supply ...
1
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1answer
118 views

Can I use 12v and 8amp battery with L298 motor driver

Can I use 12v and 8amp battery with L298 motor driver with raspberry pi model?
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0answers
42 views

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 ...
0
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1answer
27 views

Power Pi3b+ and 24V Amp off same supply

So I've got a few older pcbs for a low voltage tube headphone amp I built years ago - the Millett Hybrid - and was thinking I could put one together with my Pi3,IQAudio hat DAC, and WD passport HDD ...
1
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3answers
28 views

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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0answers
42 views

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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2answers
1k views

Camera causing Pi to reboot?

I have a Pi Zero with the version 2 pi camera. Lately, when running a program that takes pictures continuously (about once every 2 seconds), the device completely stops and reboots. The program works ...
0
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1answer
117 views

USB OTG with power supply connection to Raspberry Pi Zero

I have connected my 5.2 V 2 A tablet charger to power USB port of Raspberry Pi Zero and USB port to my Linux OS Lenovo laptop, according to this post I must cut the 5 V pin of USB PC port, but I didn'...
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3answers
5k views

Raspberry Pi 4: turn red LED off (via software)

I have an RPI 4 in my room. When I sleep the red light fills a big part of the room. I don't want to turn the pi off as I want 24/7 availability. Its ability to be quiet and always available is why I ...
1
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2answers
407 views

Single power supply to RP3 and Adafruit Motor Hat

I have a project that includes a RP3 and an Adafruit motor hat (https://www.adafruit.com/product/2348), with 2 5v stepper motors (https://www.adafruit.com/product/858). In the guide they state the ...
0
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3answers
91 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, ...
2
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1answer
304 views

How can Rpi I2C read a Coulomb Counter, up to 18V, 10A?

I"m building an autonomous boat with a solar panel. The heart of the boat is a Raspi zero which contains a small program doing the navigation. I've got a 3S li-ion battery of which I'm already ...
8
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2answers
5k views

Use MacBook charger for Raspberry Pi 4

I am using the official 15.3W USB-C Power Supply to power up my Raspberry Pi 4. I got my self a second Raspberry Pi 4 but I haven't bought the power supply yet. Would I be able to use the Macbook ...
2
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3answers
1k views

Powering Raspberry Pi via battery pack and buck converter - how to solve low voltage reboot issues

I'm trying to power a Raspberry Pi 4 via a 6-AA battery pack via buck converter which steps it down to 5V but it gets stuck in a reboot loop on boot up. Watching the display on the buck converter, the ...
0
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1answer
96 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 ...
0
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0answers
28 views

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 ...
0
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4answers
36 views

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 ...
0
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6answers
61 views

Could a USB-powered Raspberry Pi emulate a NO momentary switch (PC front panel SW signal) using its GPIO pins without causing damage?

I am trying to use a Raspberry Pi's GPIO pins in conjunction with a normal ATX motherboard's I/O pins (particularly the "power SW" pair) to trigger boot on the PC as though the Pi were a ...
2
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1answer
100 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
248 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
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1answer
664 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 ...
1
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1answer
168 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
1k views

lightning bolt on first powerup

I purchased the CANAKIT Raspberry pi with the Canakit power supply. I purchased the pre-loaded microsd card. On first power up I got the rainbow and the lightning bolt (no menu) I've tried 3 alternate ...
1
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1answer
588 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
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0answers
108 views

RPI connected to a smart plug -> how to auto turn off plug after RPI shutdown?

In short: I was wondering if it is possible to send a command to a smart plug when the pi is good to kill it's power. background I'm running a 3d printer which I'm going to control with a rpi 4 using ...
-1
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2answers
513 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 ...
8
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1answer
22k views

Powering the Pi 4 - safe voltage levels and current requirements

How to safely power the Pi 4, more specifically: What voltage levels are safe to power the Pi 4 via the USB-C connector or via the GPIO header? What are the current requirements? What Power ...
0
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1answer
51 views

Can We Use A 5.1 3a USB Type-C charger on a Raspberry Pi 4B 8 Gb or 400? [closed]

I am thinking of buying A Raspberry Pi 400 Only Keyboard ( not a kit). So for a power supply I don't want to buy the official power supply, But a adapter and a long cable ( such as here ). Can u just ...
0
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0answers
28 views

Powering raspberry pi with 7.2 Volt battery and a Buck Converter with 1.5A output

I've connected the Raspberry Pi's 5V and GND to the Outputs of a buck converter(https://www.droking.com/30W-Power-Supply-Module-DC-5-32.0V-to-0-30.0V-Buck-Converter-Adjustable-Voltage-Regulator-DC-12V-...
2
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1answer
171 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/...
2
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4answers
663 views

Using battery pack as a UPS

I need to use raspberry devices as mini servers. I'll need to install ~100 of them in different locations. In those areas, electricity power offs are quite common, so I'm thinking using a cheap usb ...
0
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1answer
250 views

Raspberry pi screen resolution and power supply

My RPi screen resolution is lower when I power it from a mobile charger than when I power it from a power supply. When I use the power supply it gives a different (higher) resolution. I checked the ...

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