More DIY EGOR

[RDwoo10 at aol.com]

Maybe i am missing something but i think that is the opposite of what you 
want to do.  if the temp is moving up & down then you want the current 
(Power, heaters are power devices) to change as well.  that is why the 
feedback is in the heater circuit to continually monitor the feedback off of 
the heater to "figure out" what the temp of the sensor is.  this way if the 
temp goes up the resistance goes up.  so we need to drive the heater less to 
keep the temp of the heater @ the running temp.  if we provided it with a 
constant current source it would always use the same power & the temp of the 
sensor would go up & down with the exhaust temp.  

any of the real EE's can jump in here, if i am all wet.  

Bob Wooten
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