Questions tagged [power-supply]

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

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182 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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1answer
6k views

Cut GPIO power on shutdown

I'm developing a project where I have a button connected to the Raspberry Pi GPIO where it sends shutdown command when pressed for 3 seconds. I also have a 16x2 LCD that outputs status messages. When ...
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131 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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3answers
42 views

I've got this mobile charger and I'm wondering if I can use it to power my pi4. If so, what should I look out for when buying a usb2-usbC adaptor?

I've got this mobile charger and I'm wondering if I can use it to power my pi4. If so, what should I look out for when buying a usb2-usbC adaptor?
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2answers
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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
372 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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2answers
154 views

Can you connect a power supply in series/paraellel to 5V & Ground GPIO pins

I am controlling a stepper motor and an LCD screen from one raspberry pi. Originally, the motor and screen were powered from the 5V output pin on the raspberry pi. I found that this would draw too ...
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I would like to add a battery to my Raspberry Pi 4. Can i do this by soldering to tp7, tp12, or tp1 on the underside of the board?

I would like to add a battery to my Raspberry Pi 4. I am building a tablet that can be turned on and off by a switch that brings power from the usb port from a power bank to power the pi, can i tie ...
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452 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
232 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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2k 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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1answer
137 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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1answer
60 views

Power off Raspberry Pi if charger of powerbank is connected and turn back on if disconnected

I have a (maybe trivial) problem. I want to power a Raspberry Pi (more specific a SteroPi) with a power bank. The power bank has the feature, that its output is always on. So even if I plug in a ...
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0answers
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Distinguishing RPi4 models with USB-C issue and without

The first model of the RPi4 seems to have an issue with USB-C, as reported by ArsTechnica. The effect is that E-marked cables do not work well. The Raspberry Foundation has confirmed this issue and ...
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1answer
630 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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3answers
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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 ...
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1answer
1k 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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1answer
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Raspberry 3+ b and two external usb drives: lack of current

I've encountered the following problem: when I connect 1 external usb hdd to my Pi, everything works fine. But when I connect second one with the same characteristics, both drives are not usable. I ...
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1answer
368 views

Powering difference between different Raspberry Pi 4 models

Raspberry Pi 4 has three models which have 1GB, 2GB, and 4GB of RAM. Is there any difference between these models for powering?
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2answers
77k 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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1answer
51 views

5v/12v power source/submersible water pump/RPI/relay. What kind of combination is suitable?

I am using a 12v DC water pump with a 20 l/min flow rate, a raspberry pi 3B and a distance sensor. I would like to use a relay and an external power supply to control turning on/off the water pump. so ...
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3answers
4k 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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Beginner help setup

I've set up my rasberri pi4 month or so ago and tried to restart but stuck on screen with color stripes please help
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1answer
204 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 ...
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1answer
41 views

Small, Rechargeable LiPo and RPi 4B

I've started a new, more specific thread, here. I'm looking for a way to power my Pi 4B inside a 3d-printed laptop project (nothing has actually been started yet), and it would be great to hear what ...
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2answers
41 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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1answer
908 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
36 views

Raspberry Pi alternative with low power mode? [closed]

The Pi has no low power mode. That's a shame. Is there anything like the Pi that does have a low power mode? Is SleepyPi or switching to ESP32/Arduino the only way?
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1answer
310 views

3.5 inch HDD case/rack with separate 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 separate power supplies. Cases/Racks with two HDD slots ...
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2answers
3k views

Raspberry Pi - 4 blinks

I'll start by saying that I probably shorted something to cause this. I noticed this behavior the next morning after spilling some water next to it. I didn't think any got on it through the holes in ...
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2answers
45 views

Powering the Raspberry 3 B+ with PSU

I have a PSU from Amazon that provides 5V and I used my trusty multimeter to adjust the voltage to exactly 5.0V. I used it previously to run some silent fans, but I don't have any use for that anymore ...
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1answer
53 views

Raspberry pi3 power supply

I want to buy a power supply that is good both for my PIC16 environment (breadboard with 3.5V - 5V power bank) and for my raspberry 3PI. Than I choice a 5V 3A power supply with a USB exit from Amazon:...
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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
31 views

UPS for Pi 3B and hdd

I'm quite new to the Pi world, but I need a UPS unit to power both a Raspberry Pi 3B and a 2.5'' hard disk used by the Pi. I thought a power bank could be the right choice for me, but I cannot find a ...
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2answers
55 views

DS18B20 Temperature Sensor's Power Supply and Rpi's Pull-Down-GPIO-Pin Sinking Current Requirements

I have a RPi zero W and am reading four ds18b20 temperature sensors (with a 10K ohm resistor between the data and vcc line). Now and then I keep getting "SensorNotReadyError" from the sensors. My ...
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1answer
226 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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6answers
12k 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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4answers
142 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 ...
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2answers
35 views

Can I power two Pi from a single Lithium battery?

I need to run at least 2 Pi together, one controlling hardware and another sensing its environment. I would like to keep weight down by using a single LiIon battery. I have one to connect to a PiJuice ...
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2answers
89 views

Power Raspberry Pi using GPIO Pins and a 10A supply with 7805

I am currently working on a project where i have micro-controller,stepper drivers etc all powered through a single 12v 10a power supply. I was planning to use the same supply to power the raspberry pi ...
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7answers
90k views

Will any external battery power a Raspberry Pi?

I am working on a project that needs the Raspberry Pi to work without a mains connection. I have considered buying a 50000mAh USB power bank. Would this power a Raspberry Pi, and if so, would it ...
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1answer
191 views

Raspberry Pi external power supply for sensors

I am working on a project that involves a Raspberry Pi 3B+ and multiple sensors (temp/humid DHT22, pH probe and EC probe from atlas scientific, cameras....). I am trying to figure out how to power my ...
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2answers
797 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 ...
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2answers
175 views

Convert 12V to 5V to power RaspberryPi

I have an Eleksmaker laser cutter which has a board with a 12V output (see top of image). I would like to power my RaspberryPi using this 12V output. What is the advantage of powering the ...
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1answer
47 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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1answer
163 views

Supply 5v to peripheral using solder pads and not GPIO?

This seems like a simple enough question but it hasn't been easy to find an answer! I have a Pi3 (with recommended PSU), official screen, official camera and I've now added the respeaker 2-mics Pi ...
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2answers
355 views

Raspberry Pi Zero W solar power setup

Good day, I have a Raspberry Pi Zero W that I would like to deploy onto a tower that is supplied with 12VDC power from a photovoltaic solar panel. I'm currently looking at powering the Pi Zero W ...
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5answers
1k views

How to monitor if a remote Rpi freezes and reboots it, using a watchdog timer or otherwise

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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2answers
169 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 ...
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2answers
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Is L293DNE Dual H-Bridge Motor Driver Chip/Board also a 5V voltage regulator/converter to power the Raspberry Pi itself?

Have been reading many articles showing how to connect DC motors to the Raspberry Pi and of course a DC Motor Driver Chip/Board is needed to come between DC motors and the Raspberry Pi GPIO Pins to be ...