Questions tagged [power-supply]

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

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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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33 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 ...
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3answers
26 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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33 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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Recommended current for external breadboard power supply [migrated]

I want to buy an external power supply for my breadboard (this one). It says that the input should be between 6.5V and 9V, which is easy enough to understand. To power the supply, I planed on buying a ...
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3answers
72 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, ...
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27 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 ...
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4answers
31 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 ...
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6answers
55 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 ...
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1answer
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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 ...
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3answers
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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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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 ...
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2answers
31 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 ...
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1answer
49 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 ...
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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-...
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3answers
48 views

Power supply raspberry pi 3 with AA batteries

I want to know if it is possible to supply power to raspberry pi 3 with AA batteries. Some electronic boards like Arduinos contains a voltage regulator. The Vin voltage input can be greater than 5V. ...
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1answer
33 views

Should I use an external power supply for controlling 4 servos?

So I have for servos that I could connect to a breadboard and to raspberry pi GPIO 5V pin to power them. But I have read that That is not safe it can damage the pi. Is that true? instead of using ...
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37 views

Official power supplies sticking out parts

I have bought a new USB-C power supply for a new RPi and the adapter is significantly smaller than the old micro-USB ones, but to my surprise this new power supply also 'suffers' from the 'oversized ...
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1answer
33 views

Raspberry pi 4 power supply without any periphirals

I'm planning to use raspberry pi 4 for homebridge. I will not be connecting any display or any input device and will use ethernet cable for network. will 5v 2amp adapter be sufficient for power?
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1answer
33 views

AC adapter for 5.6~11V DC power supply for freenove shield and raspberry pi

I recently bought a little raspberry pi + freenove car kit. The kits instructions are to use two 3.7 V 18650 rechargeable batteries. I have these batteries and everything works fine. But now I'd like ...
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1answer
97 views

Powering Raspberry Pi 4 'on the move' using power bank [closed]

There are good official resources that state that recommended power supply must be 3 amps (e.g. official RPi power supply via mains). However, for use 'on the move' or remote locations this may not be ...
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1answer
30 views

Supply (under) voltage problem

I have a solid PSU putting out 5.4VDC capable of 60amps/300watts. I have 5.4VDC going into the Pi3, but get the lightning bolt/undervoltage condition. On Pins 2 & 6 on the GPIO I'm only getting ~4....
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Raspi 2 v1.1 freezes randomly

I set up my old Raspi2 v1.1 a few days ago, but its behaving strange. It freezes / hangs up after some time. Things I've tried so far: Swapped out my sdcard for a different one Copied the os to an ...
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3answers
127 views

Powering RPi 4 Model B with 5v 3A Car Power Supply Module

I would like to use a buck converter between a 12V DC power supply and my RPi4, and found this car power supply to be appealing. It claims to step down from 12V to 5V 3A, which is almost the same as ...
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1answer
100 views

Monitor the power consumption in real-time (in Ampere or Watt)

I'd like to monitor in real-time the power consumption of a RPi. (0.5A, 1A, 2A, etc.) I know this can be done with a multimeter in ammeter mode in series, but I thought maybe there is an easier method,...
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2answers
66 views

2,5" USB external hard drive not detected

I plugged a 2,5" USB external 500GB hard drive to a Raspberry Pi 2 (Model B Rev 1.1), but it is not detected: there is no /dev/sda, /dev/sda1 lsblk does not display the disk lsusb shows a few ...
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1answer
53 views

Should I power RaspPI + peripherals from hub or use GPIO?

I’m planning my first “proper” Raspberry Pi project. I want the end result to be user friendly, and so should use only a single power source. But internally I need to power several separate devices: ...
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2answers
272 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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36 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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1answer
338 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
69 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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3answers
923 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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1answer
57 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
41 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
28 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
84 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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28 views

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
44 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
49 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
26 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
52 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
64 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
47 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
84 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
50 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
5k 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
97 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
61 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
28 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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