Questions tagged [power-supply]

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

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16 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
14 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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28 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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33 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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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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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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35 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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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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1answer
46 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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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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167 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
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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41 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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3answers
532 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
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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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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1answer
40 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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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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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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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
62 views

External power supply to servo motor [closed]

The servo motor(I'm using MG996R) needs lots of power to run through the raspberry pi board power supply. so I decided to supply it externally using an SMPS box. when the servo is connected to 5v of ...
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160 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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531 views

Power Pi4 with USB-C Power Bank

Can a USB-C Power Bank be used to power a Pi 4 for off-grid or mobile uses where the Pi cannot be tethered to either a mains electric socket or a POE switch?
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42 views

Can I power up the PI with the LDO MIC29300

I am using the MIC29300 https://www.microchip.com/wwwproducts/en/MIC29300 in my circuit to generate a 5V signal to my ADC (works fine now) Would it be possible to grab that 5V line and have it ...
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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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132 views

Power Supply Raspberry pi 4

I have googled a lot but didn't find anything useful. Can I use any power adapter other than the official Raspberry Pi supply? Moreover, I have an Argon One Case and many people have recommended ...
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2answers
176 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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1answer
327 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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3answers
60 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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1answer
79 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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1answer
47 views

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
401 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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1answer
259 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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42 views

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
48 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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61 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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2answers
102 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
57 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
1k 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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38 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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3answers
129 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
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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2answers
50 views

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 ...
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1answer
80 views

USB-C to USB-C Cable Recommendations for Pi 4

Based on the USB-C implementation issue in Pi 4 rev. 1, I'm looking for recommendations on a non e-marked USB-C cable to use for power. Having dug through my own cable stash, I've found a couple of ...
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1answer
78 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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33 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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1answer
57 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
73 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
2k 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
44 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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