Hi, Malc
relies on the sensors you use ...
LM 35, 335 .... ( voltage output ) will need 4 ADC Inputs ... Obvious, eh ?
DS 18x only need 4 Bidirectionnal I/Os ( Onewire "net" will lead to deal with DS IDs ... eh ! )
Add a nice 16 or 20 X 4 LCD ... say 1 full port
4 Pushbuttons or better a Keyboard ( looks more " pro " LOL ) 1 full port
4 R/G status Leds ... or 8 leds ... 1 Full port
let's "proto" aboard a 16F877A or 16F887 ... no soucy if a 28 pins is sufficient ( 876A or cheaper 886), and use of a faster or Bigger ROM ( if necessary ) 18F4520, 4620 or 2520/2620 will be easy ...
GLCD aren't so good, generally, because of the PID loops - BUT here there's no hurry for calculations ... or driven with it's own serial Pic Driver.
What about ???
Alain
Last edited by Acetronics2; - 6th December 2009 at 15:58.
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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