Read the statement by Michael Teeuw here.
Cooling Raspberry
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@madscientist
Expensive. :DAnyway, I didn’t want to drain the power from 3.3V GPIO. As I’ve heard, Torques could give a harm to chips of RPI when it is connected to 3.3V GPIO directly.
and for using 5V GPIO, to control its speed or on/off, additional relay circuit should be needed. I just had wanted a ready-made. :)
And about the fan noise… case-by-case. -
So, I bought a Nocutra 5V fan and coded a script like this:
https://codingworld.io/project/lueftersteuerung-raspberry-pi -
I finally received my heat sinks and had the time to play with my second Pi (3b+, not my mirror-Pi, which is just a 3b).
The heat sink is fixed to the CPU via heat conducting double-sided adhesive. It’s a small surface but it holds well. The 30mm 12V fan is connected to the 5V and GND of the Pi. That’s enough to get it running and it’s totally silent. The airflow is enough to keep everything cool.
To fix the fan to the heat sink I just used some wood screws. Didn’t have any nicer looking ones…
Costs:
- list itemFan 1.17€ from Aliexpress
- list itemHeat sink: 1.16€ (for 5 pieces) from Aliexpress, You can also buy just once but I will use the others for other projects.
- list itemHeat conducting adhesive: 1.08€ for 48 pieces (25x25mm). You can buy less but I also use it for other projects…
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Excellent. I did this a long time ago, same as you. 12v fan (from an old Mac power supply) connected to 5v and ground pin, mounted on a simple heat sink, and it’s virtually silent. My results were astonishing. Before, about 65C. After, and still, about 40C.
Can you tell my what your before and after results are? I’m just curious.
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@mykle1 Pretty much the same as yours. Before was around 62-65°C and now I am around 41-42°C under pretty much the same conditions. And for the noise: You can barely hear the fan if you put your ear right next to it. I am pretty pleased with the result, especially for the price.
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Nice. Well done, young man. :thumbsup:
