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Cooling Fan on a Melzi Board

adilmalik

Cooling Fan on a Melzi Board
May 13, 2014 12:07PM

Registered: 11 years ago
Posts: 27

Hi,

my Melzi board has a fan connector on it for an additional cooling fan. How can i use it? Can i just connect it directly to my 12v fan because i dont see a flyback diode in the schematics?

Cheers

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3Dmaker4U

Re: Cooling Fan on a Melzi Board
May 17, 2014 09:03AM

Registered: 10 years ago
Posts: 208

Basically you can connect a fan, but be aware that if you use a laptop power supply adapter then the voltage is most probably 19 V. Larger fans (e.g. 80 mm) will probably resist, but small ones (e.g. 40 mm) may die rapidly. Don't bother about diodes smiling smiley

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Jokek

Re: Cooling Fan on a Melzi Board
February 03, 2015 03:29PM

Registered: 10 years ago
Posts: 10

You can use PWM to control the fan. In that way a 12V fan can handle 19V without problems.