maxlinux2000 Posted August 28, 2019 Share Posted August 28, 2019 Most of the time our Arm computer does nothing and the CPU is around 40º, and therefore no fan is needed. But sometimes they work a lot and the fan is really necessary. So I wonder if a 5V fan connected to the gpio pins can be used and that the same board sends power to the fan when for example the CPU exceeds 60 °. And below 60º the orangepi that cuts the current to the fan. Can it be done without external components? Link to comment Share on other sites More sharing options...
guidol Posted August 28, 2019 Share Posted August 28, 2019 I dont think the GPIO line had enough power to drive the fan. I think you should wire the fan to the normal 5v line and put a switching device like a relais or switching transistor in the fan powerline connected to the GPIO or I2C line. then you can read the temperature via script and switch the fan on/off with the script. another idea would be a bimetal switch in the 5v powerline of the fan (so no script control) Just my 5 cent Link to comment Share on other sites More sharing options...
maxlinux2000 Posted August 29, 2019 Author Share Posted August 29, 2019 Tnx... good ideas, I will study them Link to comment Share on other sites More sharing options...
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