>Hi,
>        Is there anyone can provide me info. on how to make a thermometer using
> PIC?

What are your constraints? Easy programming? Cost? Temperature range? High
precision? Here are just a few ideas...

Easy programming - how about hanging an LM35 sensor and a cheap op-amp onto
the analog input of a 16C6xx

Low cost - use a thermistor and a 7555 or similar to make a temperature
dependent oscillator. Calibrate this in software.

Wide temperature range - use a type-K thermocouple and a AD595 cold junction
compensator/amplifier. Feed this into a 12 bit a-to-d with a serial interface.

High Precision - Use a platinum resistance thermometer and a commercial
linearisation module (or design your own if you feel brave) Feed this into a
16 bit a-to-d with a serial interface.

I hope these are some help,

Keith.








==========================================================
Keith Dowsett         "Variables won't; constants aren't."

E-mail:      kdowsett@rpms.ac.uk
Phone:       0181-740-3162
Fax:         0181-743-3987

Snail mail:  MRC Clinical Sciences Centre, Cyclotron Unit.
                 Hammersmith Hospital. London W12 0NN.