My Dad has a Diesel tractor and he wants me to build him a tachometer for it. He doesn't want any digital electronics on it. What would be the best way to generate a pulse off of the flywheel to use with a regular tachometer?
I have an application where I need to monitor the pressure in an air plenum to ensure air flow is present in a computing device. The air plenum will have positive and negative pressure depending on which of the two blowers are being used (one blows out, one blows in). If the pressure is +2"...
