Counting Pulses

I am needing to calculate four axle rpms. I have twenty counts per rev on each axle. If I use the COUNT command, I eat up alot of time. I am considering using the PULSIN command. A friend of mine told me about the http://www.awce.com/pak7.htm

It looks like it will do the trick. Does anyone else manufacturer a product similiar? Or are there any other options?

Thanks
Toby

Do a search for Frequency Counting, and you will find a great example that Bruce did for someone using Darrel Taylor's Instant Interrupts to trigger on a rising edge, and then trigger again later on the falling edge. I think you can easily modify it for your project, and by using interrupts you'll free up a lot of microprocessor time.

Good Luck!

Jerry.

Thank you I will look into it.
Toby

Which method you choose depends a lot on how fast those pulses are coming in. What is the maximum RPM of the shafts you are trying to measure the speed of?

3000 hz would be the absolute fastest.