Questions tagged [power-supply]

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

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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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32 views

Under-voltages while powering a Pi 3A+ via the +5V/GND pins

I need to power my Pi 3A+ via the pins (not the onboard micro USB) so I can put the power connector anywhere I want in my custom box. I have a separate micro USB female connector connected via two ...
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1answer
15 views

Best voltage for a Raspberry Pi 3B

I have 5.0V 3A and 5.2V 3A regulated supplies that I can repurpose for my Raspberry Pi 3B project. Am thinking of using the USB power jack. Which should I go with? 5.2V would seem to be within the ...
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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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159 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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29 views

Can raspberry pi4 connect to 2 2.5inch laptop harddrives with a 5v2a power supply?

I have two spare laptop hard drives and I want to use them with my raspberry Pi4. I wonder if a 5v2a power supply enough to make them up and running. If a 5v2a power supply wasn't enough, which kind ...
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196 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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34 views

Is it possible to control the 5V supply (e.g. pin 4) via python?

I want to (de)activate a fan, which is connected to the pins 4 and 6, depending on the temperature of the CPU. Is it possible to (de)activate Pin 4 (or Pin 2) at the Raspberry Pi 4 via python? I have ...
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168 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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29 views

How can I expand the 5V pins?

I require 2 more 5v pins to be used - as I would like to avoid welding the 4 wires directly to the 5V pins, I wanted to know if it would be possible to expand those pins. I would require a small ...
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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 ...
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38 views

What happens when power goes off suddenly?

I have a pi 4. While running it, the electricity was gone.After electricity was back, it was working perfectly. What can happen if this sort of power cut occurs multiple times?
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453 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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1answer
38 views

Is it safe to power Raspberry Pi 4 with 8V?

I have a ESC control from an RC car similar to this one: and although it says it has a UBEC of 6V, I measure 8V when I supply the ESC with two 18650 batteries in series. I want to supply my Raspi 4 ...
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1answer
47 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 ...
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2answers
712 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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Isolate Raspberry pi from power supply on shut down

Ok Team I need to know if this circuit will work or if there is a better way. Use Case: I have a piece of machinery that is controlled via a Raspberry pi zero W. It just controls a relay board to ...
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472 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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2answers
251 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
142 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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38 views

How to power Rpi4B and 12V solenoid at the same time?

i'm new in raspberry pi. i want to parallel powered my raspberry pi with 12 v and 5 amp, because i want to powered not just the raspberry pi. i want to powered a solenoid too that run in 12 volt and ...
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1answer
29 views

Wifi not connecting depending on power supply

I am using a RPI 3 B+ with a Touchscreen. It worked for almost a year but since 2 weeks the pi is no longer connecting to wifi. The adapter is there, I can even select my wifi, enter my password but ...
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173 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 ...
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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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43 views

Running pump & servo - Relay needed?

simulate this circuit – Schematic created using CircuitLab So I am working on a project that will require both a servo motor plus a small water pump. Both run on 3.7 -6v and I am going to use ...
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Rpi freezes every now and then, how to fix it with a watchdog?

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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3answers
534 views

Constant undervoltage, despite meter showing otherwise

I have a Raspberry Pi 3B+, running Raspbian. Linux raspberrypi 4.19.97-v7+ #1294 SMP Thu Jan 30 13:15:58 GMT 2020 armv7l GNU/Linux It server primarily as a MagicMirror2 machine. I can see the ...
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2answers
53 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
74 views

How to add Capacitors to Raspberry Pi

My goal is to add capacitors to the Raspberry Pi power-supply. Currently I have my raspberry Pi plugged straight into a portable 5v battery, this works fine. However, I want to be able to swap from ...
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3answers
130 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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3answers
535 views

How can a 12VDC power supply stepped down to 5VDC for Rpi?

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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100 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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3answers
197 views

Power supply for raspberry pi model b+

I have a 5V/1.5 A power supply lying around. Will this be sufficient for the pi b+ model?
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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
162 views

Rpi4B Smart UART UPS PSU Troubleshooting Problem

I have a MakerFocus Raspberry Pi 4 Battery Pack (Amazon). Trying to figure out the serial interface for it but documentation isn't great. I've found only this packet so far that the board sends: ...
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5answers
838 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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29 views

What power supply do I need to power three raspberry pi 3/4 and powered usb hub

I want to build a raspberry pi cluster with two RaspberryPi 4, one Raspberrypi 3 and a usb powered usb hub. in the past I used the MeanWell, RS-25-5 with 25W 5V 5A for just one Pi and usb hub. ...
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3answers
43 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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1answer
9k views

Powering Raspberry Pi Zero from a USB Power Bank

I want to purchase a USB Power Bank, one of the tiny portable ones, to power my Pi Zero, I need it to last at least 12 hours, but preferably 15 hours, for a comfortable safety cushion of time. My Pi ...
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2answers
875 views

RPi 3 B+ under voltage with Retropie

I recently acquired a brand new RPi Model 3 B+ and decided to try and install Retropie (v4.4) on it. I managed it to boot properly and I got a PS3 controller to work via USB. The problem is that I ...
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1answer
41 views

Powering multiple Raspberry Pi 4s with 65W USB-C computer charger

Is it possible to power up multiple raspberry pi's with 65W USB-C computer charger? If so, is there anyone who have done it, that they can share how they did it?
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9k views

Pi Zero W power through usb socket

Can I power a Pi Zero W and still use the usb hub at the sametime with this?
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1answer
112 views

Can I power a RPi 4 model B via a 5V/2A fast charging adapter?

It says 5V/3A in technical specs, I wonder if that 3 A is a must, or is there anybody who can power RPi 4 model B via a standard 5V / 2A smart phone adapter. Specifically, I would love to hear ...
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2answers
55 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 ...
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238 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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63 views

RPi 4B official power source not powering it ON

I am trying to get my RPi4B(4GB) powered ON with a power supply but am frustrated with the results. I found a workaround to this problem, which is that I can power on the Pi4B with a type-C USB cable ...
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332 views

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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4answers
153 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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1answer
18 views

Can I power the raspberry pi 0 w off of both ports at once?

I want to solder a male usb port to my Pi, so that it can be a little dongle computer. However, if I power it with a powerbank, and while it is still being powered, plug it into another power source ...
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1answer
31 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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