Been working on a project PWM controlled 4 NTC temp sensors 4 PWM controlled fans for my pc case
got most of the code for the PWM done and the temp sensors still a ways off yet ill post some code in the next week or so
it will eventually interface to a sparkfun LCD based on the amtel 328p with a button pad and rotary encoder
will be configurable through the lcd which will also display temps directly from the msp430g2553 as well as serial commands from the pc if i get my way..
no RPM measurement as i'm running low on pins
the NTC sensors aren't the most precise but a look up table helped with the non- linear response
I used the vcc as the ref on the voltage divider will have to see how accurate it is over a few days to a week