"Lloyd E. Sponenburgh" lloydspinsidemindspring.com wrote in message
. 3.70...
"RogerN" fired this volley in
m:

Perhaps as part of the program you could have it
record how much adjust time of the curtains accumulated over a day.
Try to tune the algorithm for best temperature control with minimal
winch run time.


Roger, a decent PID algorithm accommodates changes in conditions, and
"learns" the lead/lag characteristics of the system. Most of the even
most-basic PID controllers (ready made) have that capability.

LLoyd

It's been a while since I messed with my Basic Stamp but IIRC they used 8
bit integer math. My Basic Stamp 1 had only about 16 bytes ram, I'm not
sure that would do a PID control, maybe. I think the BS2 has about twice
that amount of ram. I'm not to great at working with integer math,
especially 8 bit.

RogerN