Gadget said:
This is going to be a 3feet tall robot so space is not an issue. The reason I am using the 18 is because I have never used it before and want to try it.
From what I herd it is alot better then the 16xxx series.
'Better' is a very relative term!, the 18F series are more complicated to use as they have a larger instruction set, although if you are already experienced with the 16F series it's not a large change - but you need to be VERY aware of the differences between the two series, there are a number of differences that aren't obvious at forst glance.
The 16F series is already the equivilent of using a sledgehammer to crack a nut for this job, moving to the 18F series is using a steamroller to do the same job :lol:
In robotics speed is rarely a problem, a PIC will spend almost all it's time doing nothing except wasting time - changing from 16F to 18F will probably increase the 'wasted time' from something like 99.5% to 99.7%.