Hackaday6y
Optical Tach Addresses The Need For Spindle Speed Control
The sensor hangs down just far enough to watch a ... No worries — a 2D-printed color-shifting tach can work too.
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What Does 'RPM' Stand For? Here's What It Means In The World Of Cars
In other words, the tachometer displays the RPM using sensors to measure the crankshaft rotations or the duration the pistons move up and down inside the combustion chamber. The tachometer has a ...