"scada" wrote in message
. net...

If I were doing it I would use a PIC chip as Paul suggested. However there
are other ways to do it if you do not want to go through the learning
curve
to program a PIC chip.

1- Use an Analog to Digital IC, make a resistor divider to scale the range
of the Temp Sensor to the input of the DAC. Take the Digital output to a
MAX232 IC (RS232 converter). The rest is in your programming.

2- Use a Voltage to Frequency converter IC (check Analog devices, National
Semiconductors to name a few). Input the IC with the resistive divider as
above, and output the digital again to the MAX232 IC.

3- www.dataq.com has a neat package for $25 that inputs several Analog
channels and outputs that data in a graph on your computer! I bought one
awhile ago, it does the job.



More excellent advice! Thank you!!