DIY: 40MHz Frequency Counter

This project describes how to make a small, cheap and simple frequency meter using Atmega16. It cane measure frequencies up to 40 Mhz with errors below 1%!

Source:http://www.ikalogic.com/freq_meter_2.php

 

The display used is four common anode type 7-segment display. Since an ATMEGA16 microcontroller can source up to 40mA of current per I/O pin, no need of transistors for the 4 enable signals.

The firmware for Atmega16 is written in C.

Read Rest of the Project.