Questions tagged [power-supply]

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

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2answers
29 views

Pi crashes without apparent reason

I own a Pi4 (4GB), and I'm having some issues. The pi crashes with no apparent reason. By crashes I mean it becomes unreacheable via ssh, PiHole and HomeAssistant that are running on it become ...
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0answers
25 views

CAN I boot RPI4 power up all 3.3V, 1.8V, 1.2V separately? and remove MxL7704

I am wondering If I can Run RPI4 or RPI CM4 by external 3.3V, 1.8V, 1.2V (x2) connected to board removing Mxl7704 and Chokes. and I may have to pull up RUN signal to RPI. located at MxL7704's 20th pin....
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15 views

Powering HDMI splitter from Raspberry Pi Zero W

I have a base zero W that I want to turn into a receiver for spotify connect and some old speakers that connect via a 3.5mm jack. I want to get audio out of it that isn't horrific sounding (such as $5 ...
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0answers
32 views

Powering Raspberry PI 4 from powerbank

I have a Raspberry PI4 and i want to include it in an embedded system so I decided to power it with a power bank but the only power banks I find are 5V 3.5A or 6V 3A.Is it ok to use one of them or ...
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1answer
63 views

Mean well power supply for rpi through GPIO [closed]

I have a Mean Well Switching power supply 5V. I have connected 5V output to rpi's 3b+ gpio pins to power it up, but the supply is just going up/down like it has no power drain. can you recommend how ...
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1answer
31 views

Why does my Pi Zero keep shutting down by itself?

I am trying to make a smart plug that activates a relay when it receives a certain message via MQTT. It works, but the Pi shuts down randomly, both when the relay is active and when everything is just ...
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2answers
556 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 ...
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0answers
23 views

What's the upper limit on power that the 3B+ can take?

I've been looking to power my Pi using batteries, but I've had no luck so far. I used a power bank with 5V, 2.1A output but I got the "under voltage detected" error. Internet search told me ...
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1answer
36 views

How can I use a GPIO input pin for a 12v circuit?

I want to know with the raspberry pi if the button is clicked. I want ot use the button of the GPIOZERO python library. The power plug is a 12v power plug. Can this circuit work? (I'm a beginner.) ...
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1answer
37 views

Pi Zero with RS-485 interface operated inside breaker panel crashes

Setup I am operating an Raspberry Pi Zero inside a distribution board. The pi is powered via usb using a din rail power supply and it connected to an usb-rs485-adapter to get modbus data from a smart ...
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0answers
19 views

Physically turn the Raspberry Pi Touch display on and off with a switch

I use a Raspberry Pi Touch Display that I connect like shown in the following picture to my Raspberry. The black and red wires are connected to thee GND and 5v pins respectively. Now I want to ...
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1answer
69 views

Can RPi 4 deliver more amps on the 5 volt rail than RPi 3 powered over PoE?

I have a setup using a Raspberry Pi 3B. I use the PoE hat on top and I power the entire setup over PoE from a Unifi switch. The setup has quite a lot of peripherals that need power and I use the 5 ...
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1answer
30 views

How to hold the date that has been set on an improper shutdown?

I've noticed that if I set a date through the timedate command, let's say date -s "2 OCT 2006 18:00:00" and I reboot the Raspberry or I do a proper shutdown the system hold the right date, ...
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Can I use a TP4056 Micro USB 5V 1A instead of a powerboost 1000c to a Raspberry Pi Zero?

I am using a Raspberry Pi Zero and to make it rechargeable I need a Powerboost 1000c (from https://www.adafruit.com/product/2465) would I be able to supplement this for a TP4056 Micro USB 5V 1A? This ...
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2answers
39 views

Red Led flashing

I have a PI 4, WHEN using a 3.5A USB power measured 5.1v supply, the red LED is constantly on. When using a power supply which was rescued from a DVD player, checked supply 5.1v I get a flashing red ...
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1answer
43 views

How should I power multiple RPi 3 units from a beefy power supply? [closed]

I have to power 20 Raspberry Pi 3 units from a few 5V 10A power DC power supplies. I have little experience in electronics. The RPis can be up to 1.5m apart from one another. A friend of mine ...
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1answer
25 views

Raspberry Pi B don't start [closed]

I try to boot from Rasbperry PI 1B version 2011.12, but it only shows the Red light but nothing happen. I try difference OS with no luck. The problem is the power?
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1answer
44 views

Keep running Pi while charging batteries [closed]

I would like to build a simple automatic irrigation system with Pi zero, the thing is that I don't have access to electricity outside. I thought to connect 5v solar panel + 3\4 chargeable batteries. ...
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4answers
57 views

power troubleshooting

I am trying to power a raspberry pi 3 over a long distance (5 meters). I can power the raspberry pi with the standard power supply from Raspberry Pi itself, but when I use these: https://www.digikey....
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1answer
40 views

Can i run my raspberry pi 24x7 with the solar power bank? [closed]

I wanted to run the pi with a pi cam and internet module for 24x7 for lifelong, can i do that if i am using a 10000mah solar power bank https://www.amazon.in/dp/B07DB5FT9H/ref=...
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3answers
71 views

Running Toy Motor circuit with Pi's 5v

I am currently going through the tutorials included with those kits that you can get for the Pis with breadboards and components, etc. Anyway, in the tutorial, I am making the following circuit: In ...
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2answers
26 views

Raspberry Pi not booting - red power light, no ACT light

I shut my RPi3 Model 3B+ down earlier with sudo shutdown now, and while it was shutdown, but not disconnected, we had a power outage. When the power came back on, the Pi would not start. The red power ...
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1answer
612 views

Pi 4 maximum power consumption

What is the maximum theoretical power consumption of Pi 4? I had expected that I would be able to find some sort of specification table for that, but I could not. The only things I could find were ...
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1answer
73 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 ...
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1answer
54 views

external power supply [closed]

Using Rpi4. Using camera and IR lighting. Would like it to be powered by rechargeable batteries. What are my options.. I have found 'holding cases' for AA batteries but only for Raspberry 3s. I have ...
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0answers
18 views

Buttons connected to uart including standby/power button

I have a electronics project (32x32 Pixel led panel) with a raspberry pi as computing unit. This device has a self made PCB with holds 2 voltage regulators, one for the onboard micro controller (atmel ...
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3answers
134 views

Power Raspberry Pi 4 with a phone charger [duplicate]

I've got a phone charger that delivers 4.5 A at 5 V (Huawei SuperCharge), which should be enough to power the the Pi 4. Can I use this charger or do I have to buy the original one? Thanks in advance
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1answer
291 views

Power Raspberry Pi 4 (4GB) In any Car [closed]

Hey , so here's the dilemma , I want to use My yet-unused Raspberry Pi 4 (4GB) in my car , providing it works , as it seems this one was from the first batches manufactured and people reported it ...
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2answers
68 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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3answers
39 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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1answer
81 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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1answer
46 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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1answer
37 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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1answer
57 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
57 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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37 views

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
131 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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1answer
61 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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2answers
2k 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
48 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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1answer
66 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
640 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
268 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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0answers
106 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
60 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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1answer
465 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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0answers
72 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
26 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
138 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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2answers
338 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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