My project using the famous and simple 16F84A
I've done a simple but very nice (actually it was not simple in the beginning at all) project using 16F84A µC. It was a
frequency meter. It measures the frequency of several i/p waves. If it is square, you can directly i/p it to the µC. If it is sine wave, you can use a sine>sq. wave converter . The same case applies to triangular wave.
The edges of the i/p square wave are counted, then displayed either on an LCD or one seven segment display, by showing one digit of the the whole frequency no. then removing it, waiting .5 secs (for instance), then showing the next digit.
We (me and my team), were able to measure the frequency till about 1 MHz.
PS. If you've seen the movie
INCREDIBLES, then, our frequency meter was
fast enough like DASH (who is inside my avatar on your left
)