Low squarewave frequency doubler?

[Andreas]

Thanks for the help guys!

Hello,

and this really works with a "real" car?

Usually there is a plausibility between engine speed and wheel speed which switches off cruise control if there is a implausible "gear ratio" like e.g. on a slippery/iced road.

with best regards

Andreas

[AmmoJammo]

This system has no way of monitoring engine RPM, only wheel speed.