Poor man’s counter
This project will turn your multimeter into a sensitive frequency counter with a wide counting range.You can also use this project to upgrade your old frequency counter and extend the range up to 2.5GHz.This project will describe a prescaler which will work up to 2.5GHz and with very high input sensitivity.The prescaler will divide the input frequency with either 1000 or 10.000.
   Poor man’s counter
For more detail Poor man’s counter website
hem.passagen.se