Aaron,
I would not use a thermocouple, I'd use a thermistor.  Thermocouples need to
have cold junction compensation and complex high gain amplifiers, they don't
interface directly with PICs.

THermistors, however, interface realy well.  Look up AN512 for a way to read
a resistor without using an A/D input.  You'll need to write a lookup table
to linearize the thermistor.  This has been discussed a little the last
couple of days.

 This fellow is doing virtually the same thing - contact him and compare
notes:  > Marcelo Y. m_yamamoto@uol.com.br



-----Original Message-----
From: Aaron <azzi_b@AZZNET.FREESERVE.CO.UK>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Monday, October 18, 1999 4:41 PM
Subject: HELP


>I am just starting to program pic chips, and i am working on a ecu system
>for a small gas turbine engine for use in a radio controled plane.
>
>I am wanting to know how to read  and calibrate a thermocouple into my
>16c84, and how to power a 4 volt electric motor with variable speed.  I
have
>already figured out to measure the pulse generated by the reciever, and now
>am getting a little stuck on these points.   Can anyone help
>
>Regards
>
>Aaron Bott