robincnn
Well-Known Member
Thanks for your inspiring designs.If it stays OFF or On ,the fan has failed and no longer operates.
So .. A blue small led ,for the "Fan OK " thing and a bi-colored ,red-green ,for the "SoftOnSet " thingy ...
At the center ,the 12 position dial ,of the single pole rotary switch adjusting
the driver's output current .
Was there any reason you chose HLP-60H-42 over lpf 60d 42. Other than efficiency
Most quality fans have MTBF over 150k hours. Is fan relibilty still an issue?
I was thinking of a diy that will use bi metal thermal switch and will cut down power to 20% if heatsink temp goes over a threshold(fan failure).
Was thinking of adding 25k ohm and thermal switch parallel to 100k pot. Problem is I need thermal switch needs to stay open and close at the threshold temp, opposite of what those big metal thermal switches. Not sure if there is an easier way to do this.