Questions tagged [cooling]

Use for questions related to cooling the Raspberry Pi.

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2 votes
3 answers
89 views

Board getting super hot, what's wrong with my Raspberry Pi 3?

So I was about to benchmark cooling techniques to cool my raspberries when I noticed that my RPI3B Rev 1.2 board was getting abnormally hot out of the box when booting a vanilla Raspbian from the SD ...
1 vote
1 answer
45 views

Connect several sim800l with external power supply to the uart of ip4 and floating ground

I am creating a circuit with several sim00l connected to different UARTs each with its own external power. But I'm curious if having other objects like cooler-fan connected to other GND of the rpi ...
0 votes
1 answer
133 views

Raspberry Pi Case fan running 24/7

So a few days ago, I installed Raspbian Bullseye on my Raspberry Pi 4, and now the case fan (pin 4) is running 24/7 Even when the fan is disabled, the GPIO 14 pin is unplugged, or the system is turned ...
0 votes
0 answers
34 views

Using Temp Sensor to Control Mains Water Valve

I have a complicated use case that I'm hoping to solve work a RaspberPi. I need to control a valve that turns on mains water from city service when a temperature sensor reaches the max allowable limit ...
0 votes
2 answers
526 views

Lower temperature for GPIO fan turning on

raspi-config P4 only allows temperatures above 60, but I prefer being able to touch my pi before the fan turns on. Is there a way to ignore this limit and set the temperature to a lower value?
1 vote
2 answers
371 views

Does installing a fan need inrush current protection?

On the internet, I found this plan to install and control a fan: I wondered whether one needs protection against inrush current since I heard a fan might draw quite some current when it is starting ...
0 votes
2 answers
105 views

Air cooling calculation? [closed]

How do I calculate the airflow needed to cool a RPi2 / 3 / 4? Assume "cool" means keeping the chip below a temperature where the Pi needs to throttle. Assume the chip is being stress tested, ...
1 vote
1 answer
97 views

Raspberry Pi cooled with a Peltier cell [closed]

I've an RPI3B+ mounted in an IP65 box and placed inside a greenhouse. Obviously the CPU becames really hot during the day and it reaches 80°C (even after the installation of the small heatsinks). I ...
2 votes
2 answers
393 views

raspberry pi fan don't start to spin without hand help!

Raspberry Pi has recently added fan control feature in its raspi-config tool. This made me curious to add a fan to my RPI 4. I did it recently with a 680-ohm resistor, 2N2222 transistor, 1N4007 diode, ...
-1 votes
2 answers
121 views

Pi-4 with fans and ribbon cable

New to this. I bought a pi-4 kit. It has dual heatsink fans that get connected to pin 4 and 6. however, I want to do other projects and need to connect a ribbon cable to it. how can i do that while ...
1 vote
3 answers
111 views

Raspberry PI cooling

I have just recently got a Raspberry PI 4B with 8GB RAM and I am wondering how much cooling is necessary. The usecase will be installing Arch Linux and using it as my daily driver, so it probably has ...
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-2 votes
1 answer
311 views

What are the CPU fan speed options for the Pi? [closed]

I see that I can connect my CPU fan (included with a kit) to pins 4 and 6 (red and black respectively) to cool my CPU. However this is rather loud. How can I run the fan in a way that is quieter? How ...
  • 349
1 vote
2 answers
147 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 ...
3 votes
4 answers
6k views

Can I control a 4-pin fan with a Raspberry Pi without adding more circuitry?

I'm interested in adding a fan to my Raspberry Pi 4, but I would like to be able to control when it is on/off programatically. However, what I see is that most of the fans suitable for Raspberry Pi ...
  • 139
1 vote
1 answer
415 views

How to dimension a heat pipe + radiator for passive cooling of the RPi 4 B?

I'd like to cool a Raspberry Pi 4 Modell B with passive cooling only. To get the heat away from the chip I'd like to use a heat pipe and radiator to distribute the heat. Something like this. My ...
  • 155
0 votes
1 answer
2k views

Comfortable long-term operating temperature for Raspberry Pi 4B [closed]

I have a Raspberry Pi 4B 8GB running non-stop under a fairly mild load. Among other things, it serves a somewhat large PostgreSQL DB, but the mean CPU usage rarely exceeds 25%. There is a Low-Profile ...
  • 131
1 vote
1 answer
209 views

Do i need a fan, or will ventilation holes suffice?

this setup has not yet been completed. I'm only asking so I can order a fan if needed I plan on connecting the following elements directly to my pi4- relay(i think I'll need two) small LED with ...
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2 votes
1 answer
1k views

Will thermal paste help in cooling down the CPU of my Pi 4 even further?

I have the latest Raspberry Pi 4 (8gb edition), I'm using my Pi as a server to host a website, and to host a Discord bot that is being used in more than ~800 servers right now. I overclocked my Pi, ...
  • 29
0 votes
0 answers
40 views

Does raspberry 4 need cooling? [duplicate]

I got RPi 4 (4GB), with official case and power supply, updated to latest eeprom BCM2711 detected Dedicated VL805 EEPROM detected BOOTLOADER: up-to-date CURRENT: Thu Apr 16 17:11:26 UTC 2020 (...
2 votes
1 answer
3k views

Is it safe to connect a 3.3v fan to gpio instead of power? [duplicate]

I have a Raspberry Pi 4B and a fan. According to the instructions paper of the fan, it should be connected to a ground and a 3.3V power , or a ground and a 5V power. So I've used the former setup ...
  • 141
0 votes
2 answers
403 views

Cooling problem

I'm going to put my raspberry pi zero in a water/air tight box outdoors, but I'm worried that it might overheat with it preforming tasks all day and sitting in the sun. Considering that, I want a way ...
  • 79
1 vote
1 answer
1k views

Does this flat heat sink even work for cooling?

I bought a raspberry pi 4 case, and it came with these heat sinks you see in the picture + a fan. From the sizes, I guess the flat heat sink is for the CPU. I kind of find it hard to believe that this ...
1 vote
0 answers
62 views

How to power RPi with fan from single source?

Electronics beginner here. I have Raspberry Pi 4 GB variant. I have the following power requirements: power a 5V cooling fan 12V cooling fan (a spare cooler master)thanks @Milliways safely (i.e. ...
0 votes
0 answers
81 views

Finding source code for the Atmel MCU on the PoE Hat

I have recently purchased a raspberry pi 4. I have a small DC cooling fan for it, but I am limited to it being constantly on, which is annoying. I have seen (but do not need, or personally have access ...
-1 votes
3 answers
337 views

Running RPi 3B without a fan or radiator [duplicate]

I am using my RPi 3B purely for feeding data Flightradar24 (with Pi24 installed instead of pure Raspbian). I assume that usage of electronics and overall load of the device is rather low. My ...
  • 129
2 votes
0 answers
162 views

Cooling Fan Hat?

The PoE hat has a built-in cooling fan, and even has drivers in Raspbian to automatically turn it on and off based on the CPU temperature. However, any guides to add a temperature-controlled fan seem ...
6 votes
2 answers
3k views

Are resistors required for builtin PWM fans?

There are many guides on how to set up a 5V fan for a Raspberry Pi and control its speed with PWM. Usually, this includes using a a transistor a resistor between the PWM pin and the transistor gate ...
  • 161
4 votes
4 answers
15k views

How to program active cooling connected to GPIO

I have Raspberry Pi 3b+ with the case, which has a small 5v fan, which is connected to GPIO. Look to picture below: The Fan runs continuously, but I don't want continuous operation. I want the fan to ...
  • 125
1 vote
1 answer
42 views

Controlling array of fans

So I'm building a stack of Pi's and the case I'm buying comes with four fans. I want to use a Pi Zero (ideally, but whichever one will work is fine) to control all the fans but I have no clue if this ...
0 votes
0 answers
82 views

Can I use the ALJ D882 transistor or SS8550 transistor to control the 5V fan on my raspberry pi 3?

Can I use the ALJ D882 transistor or SS8550 transistor to control a 5V fan on my Raspberry Pi 3? Fan is 5V 0.33A (fan from my old laptop). http://alltransistors.com/transistor.php?transistor=52900 - ...
  • 1
0 votes
2 answers
59 views

Running temperature options

I have new RPi 3B+ intended to run 24/7. I am looking to ensure it doesn't overheat, so am wondering whether having wired ethernet would make it run cooler than using the WiFi? The Pi is situated ...
  • 136
1 vote
3 answers
1k views

Raspberry Pi case ventilation necessary?

I have a Pi 3 B+ that I am using as a portable media server, and it can get quite warm. I need a case for it, and I have been looking at a few, however very few of them have any sort of ventilation. ...
0 votes
0 answers
216 views

Used within a Pi-Top Notebook, does the Raspberry Pi 3 B+ run cooler than the Pi 3 B?

I've been thinking about upgrading from a B to a B+, so I went and looked at the Raspbian Stretch with Desktop download I recently used to set up a new SD card for my Pi-Top running the Model B. It is ...
3 votes
3 answers
45k views

Where do I plug in a 5V mini fan on a Raspberry Pi?

I have a Raspberry Pi 3 Model B+. I am currently installing the Pi into a Super Tinytendo case, which came with a built-in mini fan. However, I'm not sure which set of pins I should plug the fan into. ...
0 votes
4 answers
6k views

What cooling is the most effective for the RPi 3B+?

I've been doing some research with the new RPi 3B+, but have been struggling to find much information about effective cooling for overclocking. I have seen some solutions such as Heatsinks (small ...
3 votes
2 answers
835 views

Cooling down the Raspberry Pi 3 in a Vacuum

I'm working on a small little project involving the Raspberry Pi 3 and the LSM9DS1 Breakout board from Adafruit. We plan to place the Pi and the sensor board in a high radiation environment (but ...
1 vote
1 answer
358 views

Is it safe to paint the Raspberry Pi PCB and microchips to give it a different color, and if so, are there recommended products?

In the O'Reilly book "Raspberry Pi Hacks" there is Hack 40 "Make Your Pi Water-Resistant (Without a Case)" in which they describe how they make a Raspberry Pi temporarily water-resistant using ...
  • 1,082
1 vote
1 answer
963 views

Powering a 5 volt fan from GPIO

I found a 5 volt fan from an Acer laptop, and want to fit it to my Pi (sunon maglev fan GC055515VH-A). It has three wires - red, black, and yellow - why is that?! The unit does not state its ...
  • 11
1 vote
1 answer
261 views

Pigrrl 2 case and cooling fan

I know how to set up a fan on a Pi 3. But can I attach this fan to the GPIO under the Pi by soldering it and will it affect the PiTFT that is actually attached to the Pi GPIO on top? And could the ...
0 votes
1 answer
1k views

Detect CPU slowdown due to overheating

How do you detect when the Pi is slowing down its clockspeed due to overheating? I know I can find the "current" CPU speed by running: sudo cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq ...
  • 2,211
1 vote
1 answer
184 views

does a heatsink for RPi3 processor needs to be exactly centered?

Does a heatsink for RPi 3 processor needs to be exactly centered ? It fell while I was "aiming" for the processor with the board in its case (I know, sloppy). Thankfully the thermal pasted heatsink ...
  • 235
4 votes
4 answers
1k views

Did I destroy my GPIO board?

I bought a 30mm DC fan to cool off my Pi. It worked just fine if I plugged it into the 5V and GND pins. However, I wanted it to be programmatically controlled, so I plugged it into pin #18 and GND. ...
  • 69
1 vote
1 answer
2k views

Will a USB powered fan cool my Pi 3 with a touchscreen attached and will it draw to much power?

I have seen tutorials that show a fan plugged into the USB port to cool the Pi, would this overload the Pi? Is it necessary to use a fan at all?
  • 313
2 votes
3 answers
195 views

Will a fan cool my Pi 3?

Will a fan cool my Pi 3 without heatsink? I'm using it for some hard-core gaming and it's heating up enough that the thermal warning comes up and I don't want to use heatsink because the case I've got ...
2 votes
3 answers
10k views

Will 3.3v gpio work for a fan without hurting the pi?

Will it hurt the pi if I run a fan on the 3.3v gpio? I have a hdmi lcd screen on mine and I don't want to use the usb ports for a fan. I have a raspberry pi 3 by the way
5 votes
5 answers
9k views

How do I control GPIO-connected fan via code at a certain CPU temperature?

I have just bought a 5v Pi fan for my Pi3. I'm using Retropie 4.1 for the OS. I have connected the red and black wires of the fan to ground and GPIO 18 respectively. How can I get the fan to start ...
0 votes
1 answer
2k views

Raspberry PI 3 fan doesn't work

I have connected fan (5V, 0.2A) to raspberry pi 3 on pins 2 and 4. When I turn on raspberry, fan doesn't work. Does fan should start with turning on raspberry? Or I have to setup some configuration to ...
  • 103
8 votes
4 answers
48k views

Cooling fan powered directly from GPIO?

I have a Pi3 in a fairly enclosed environment, and I found that, even when my Pi was relatively idle (5% CPU usage) the CPU temp was averaging around 80C, which is close to the 85C where the Pi starts ...
  • 2,211
1 vote
4 answers
2k views

do I need radiator for Raspberry PI 3 model B [duplicate]

I am going to build cluster with Raspberry Pi 3 Model B. I am going to buy dozen of raspberry. and I wanted to know if I need radiator too
  • 11
11 votes
6 answers
25k views

Raspberry Pi cooling; Blow cold air in or suck the hot air out?

I'm attaching a fan to the RPi's original case. I wanted to use a laptop cpu fan. Should I suck the hot air from RPi? or blow cold air inside the case? Btw, there's a heatsink on the Soc and LAN & ...
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