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Author Topic: Arduino Uno Heat Generation  (Read 254 times)
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Hi All,

New guy here --  I'm in the process of developing a cooling system and have started calculating the heat generation within the system.  Does anyone know how much heat the Arduino Uno generates?  If not, a ballpark figure will suffice for the time being.  Thanks in advance.
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Depends on the power source.
USB from computer, 5V/500mA is supplied, so 2.5W max.

9V from external source at 500mA? 4V, 500mA is dissipated just as heat in the regulator.
12V, even worse.

So, very situation dependent.
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The arduino itself consumes about 40mA so that at 5V gives you 0.2W. But as cross roads says the bulk of the power is from the regulator.
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Gents,

Thanks so much for the info, it's much appreciated!

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