Dear Derossi, John, Steve and others,
thanx for your suggestions. We have tried with the R/C filter by giving pulses through switch using 1k resistior and 0.01 capacitor
and also 1k resistor and 4.7 capacitor. There was improvement in the calculation of external events but still the result was not accurate. We will now have to try with Flipflop and software debouncing. Can anyone suggest a debounce software ?
Thanking you all