Guide on flow sensor application

[HenrikOlsson]

Hi,

1) Sure, configure TMR1 as a counter and feed the signal to the T1CKI (Timer 1 Clock Input) pin instead of T0CKI.
2) It's possible for sure but how to do it "the best way" depends on the frequency of the incoming pulses from the sensors and on what else the PIC needs to do. For example, use TMR0 and TMR1 to count pulses from two of the sensors and use two IOC-pins for the other two. Another option is to use four IOC-pins, one for each sensor. Another is to use four external F/V converter chips and feed the output voltage from each to the ADC of the PIC. Yet another is to use the count command on four pins in sequence.

/Henrik.

EDIT: OK, just saw that the output frequency is fairly low. ~45Hz at full flow, dutycycle of 40-60%. So, as long as you poll the inputs at at least ~120Hz (timer interrupt for example) you should be able to count pulses in software.