Hello Rudy,

Nice to hear your willingness to work and learn.

Going by your needs you will do well to select the P89c51RD2 from philps - it has all that you want - UART, PCAs, PWMs and most important 64K of Flash. No need for a separate programmer - how about that ?

And when selecting the slots for the optical tacho use 60 segments - that way the RPM == Hertz.

And finally you said you want to use Fuzzy logic - well that is interesting. When you just have one output and one feedback is fuzzy logic going to give big benefits ? OK I am not very conversant here - just curious.

Have fun

Raghu