Hi,

I'm about to start designing a small system that is to provide reasonably
accurate temp control, drive a 2x16 or 2x20 lcd and handle12 inputs and 10
outputs.

I'm probably going to use a `74 for the job.
I'm looking to those of you that have experience with these these things for
advice.

1. I need to store temp setting and some other data in NV memory. I require
about 128 Bytes. May be written to once or twice a day. Can I use the EEProm
in the 74 for this?

2. I need a cheap but reliable 10 bit A/D with IIC. (dosen't every one?)

3. Is it efficient to drive the LCD from the serial port or is 4 bits on a
parallel port the best way?

4. I'm planning to use a dead simple control algorithm for the temp controller,
but just in case, does anyone have souce code (prefer basic) for a pid loop
algorithm.

Thanks & Regards,
Glen Fry
fry@powerup.com.au
Who is very very new to PICS, but keen to have a go.