help with op amp circuit

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trident
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Post by trident » Sun Nov 09, 2008 1:03 pm

Hello

The pull up was added as a failsafe for a missing control signal, this will keep the fan running and prevent loss of cooling. The control signal is from an open-collector / open drain-output so I think 10K will work.

Regards, trident

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MrAl
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Post by MrAl » Mon Nov 10, 2008 9:43 am

Hi again,

Ok, sounds good. You should be all set then...
LEDs vs Bulbs, LEDs are winning.

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