I'm working on developing an Arduino-based small engine tachometer that takes its input signal from an engine's spark plug wire. Going outside to experiment with a live engine got tiresome, so I arranged this on my wood lathe.
It's a scrapped Tecumseh TVS90 lawnmower engine with the fuel tank, air cleaner and carburetor removed.
It works. I run it at the lathe's lowest speed (500 rpm) and I get spark generation for testing my tachometer design. A downside is that crankcase oil seeps down past the piston eventually and comes out the open spark plug hole in the cylinder head. I'm also getting what I take to be electromagnetic field generation from the ignition coil that's overwhelming my pickup probe. I haven't had that problem with a live engine mounted on a lawnmower.
So, it remains to be seen whether or not I can call this item a success.
- - -
Addendum -- SATURDAY, FEBRUARY 9, 2019
Here's a brief video of the rig in action.
# # #
# # #
No comments:
Post a Comment