Yes the output is a fixed value timed pulse.. but if you play around with a variable resistor in the range, you could make it really sing !! I've done it but most small enough pots to fit on the board were twitchy..so when you plug this one in, it assumes the role of 3000 rpm..can be changed.. maybe a series of dip switches?? now there's an idea!! try it Charlie.. who knows.. you may be the next electronic guru!

John