Rickharris
Senior Member
I need to measure RPM of a motor shaft - about 2000 RPM - I intend to use a photo transistor LED etc - and will get the bits tomorrow at school - But a thought struck me I am concerned that as the speed increases the pulse width will decrease - am I correct in thinking that I could coloured the shaft half black and half white i.e. a 50% duty cycle i would still get the same count as if i put a narrow stripe on the shaft.
It sounds logical but I have been struck by doubt. Can always try it tomorrow of course.
It sounds logical but I have been struck by doubt. Can always try it tomorrow of course.