AVR frequency counter

[new_bee]

Hi everybody, I'm new in this area, so I need your help...
I want to make LED (or better with LCD display) RPM meter that measure 0 to 12000 rpm, based on frequency counter, that means that I need frequency from 0 to 200 Khz, right?

So, if anyone had shematic with code, it will be great!
Thanks alot 8)

 

[chuckey]

12000 Revs Per Minute = 12000/60 = 200 Revs per Second. = 0-> 200 Hz counter. Any counter will do this.
Frank

 

[medap]

use GOOGLE for search AVR + RPM.

 

[dr pepper]

I did something similar but with a pic so not much use to you, the system also displayed road speed, oil pressure, oil temp, gear shift position, voltage etc, wasnt so hard to do, fairly basic stuff for a microc these days.