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DIY wind sim with more than 3 PWM fans?

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(@tonym)
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Joined: 4 years ago
Posts: 6
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In the standard setting it is meant to connect up to 3 PWM fans (like 3 x Noctua NF-A14 iPPC 3000) to an Arduino Uno via the PWM on Pin 9, 10 and 11. The 12V power is then going directly to the 3 fans.

 

But….

 

Can I connect 2 PWM fans, instead of only 1 fan, to an single PWM output on the Arduino pin#9, 10 or 11?

(That way I could have more than 3 fans connected to a single Arduino)

 

I mean is the PWM signal coming from the Arduino “strong” enough to control 2 fans instead of 1 fan?


   
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 fgnq
(@fgnq)
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Joined: 3 years ago
Posts: 11
 

Siempre que no rebases el consumo de 3 amp, se puede hacer, pero no hace falta eso, el sistema esta preparado para 4 ventiladores, yo tengo 2 para el viento y 2 fijos, pero podria poner los 4 al viento, siempre que no rebase los 3 amp.

Saludos.


   
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(@tonym)
Active Member
Joined: 4 years ago
Posts: 6
Topic starter  

Answering my own question as I did my wind sim project: It does work.

My setting:

4 PWM fans connected to 3 PWM outputs on a Arduino Leonardo (9, 10 and 11).

Pin #10 is then used to control 2 PWM fans.


   
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