Hi,
A question: I can see that the POV effect is something similar to an stroboscopic effect (is it?). Such a case: I've understood that you use the CD with the notch as a clock signal for the arduino. Is that the case or the CD you are using is the CD that makes the POV?.
In any case: you are using the signal coming from the notch as an interrupt to do something, so you have to solve the problem . . .
Comparator (use of): of course, it depends on the signal you get form the CD/notch system. In general terms, YOU CAN eliminate the noise problem by means of a comparator; sometimes a simple RC (resistor - capacitor) circuit will do . . I need to know 1) what is the speed of the CD (rpm)? and 2) what is the width of the notch?
I adjoint an image to illustrate the effect of the noise (why it generates a number of interrupts) an another one whith a standard comparator circuit (just to make sure we are talking about the same thing).
Regards
