my PWM Fan Controller with real time RPM display

[d0ughb0y]

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http://youtu.be/DwWnl3bREww

Full control of 4 pin PWM fans.
It actually stops the fan when you set the duty cycle to 0, unlike other pwm fan controllers that can't actually turn off the fan.
Plus real time RPM display.

This is part of my DIY controller.
http://www.reefcentral.com/forums/showthread.php?p=23188619#post23188619

 

[Ligershark]

Full control of 4 pin PWM fans.
It actually stops the fan when you set the duty cycle to 0, unlike other pwm fan controllers that can't actually turn off the fan.
Plus real time RPM display.

This is part of my DIY controller.
http://www.reefcentral.com/forums/showthread.php?p=23188619#post23188619

I have some somewhat related questions for you doughboy. I use pwm fans with my storm x. When my led's begin to turn on or off (say dawn or dusk) the fans automatically go to full speed and are unnecessarily loud. Do you know of a way for me to have them gradually increase like my leds? Have you used or been able to tinker with a storm x controller? There is a special channel for fans where you set minimum and maximum speeds. The problem is I cannot set a time curve.

 

[d0ughb0y]

you can make it ramp by calculating the duty cycle using arduino map function.
my diy controller code has the pwm fan ramp feature.