This frequency meter is capable of frequencies upto 5Mhz . It has an error rate of 5% at any frequency. (by averaging ..)
The compiler used is HI-TECH C . (basically the program can be recompiled for any PIC which has a CCP1 module and timer 1).
Xtal is 20 MHz.
The opamp can be any model that has GBP of about 20Mhz.
The circuit can directly measure any frequency upto 4.5 - 5 Mhz.
( The frequency range of this counter can be increased upto 10 to 20MHz, by adding a frequency divider circuit. )
The files can be downloaded from
Hotfile.com: ?atwy hosting plików jednym klikni?ciem: freqcntr.zip
Check it out and suggest improvements if any :) This is my own successful project . mi8 b able to help in your doubts if ne.
Hava Nice Time