help with op amp circuit

This is the place for any magazine-related discussions that don't fit in any of the column discussion boards below.
Posts: 23
Joined: Wed Aug 20, 2008 3:30 pm
Location: Indiana, USA

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


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

User avatar
Posts: 3862
Joined: Fri Jan 11, 2002 1:01 am
Location: NewJersey

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.

Post Reply

Who is online

Users browsing this forum: Google [Bot] and 35 guests