I the past, I have used my optical tach to measure RPM and check tach
accuracy. This is a unit I bought from the Radio controlled model airplane
shop.In R/C model flying, it is held in front of the propeller and the
light pulses cause it to read prop RPM. On my sprite, I just paint two white
marks on a pulley and read engine speed. This is a well and good when the
tach is in the car, but what I need is something that will check a tach on
the bench. Anyone out there able to design a "pulse gererator" of sorts from
Radio Shack parts I could build as a winter project? Bob C
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