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Entombing that mess with a squirt of hot melt glue
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That makes it a tank circuit with Q = R sqrt(C / L) = 1. Which is a pretty low Q, all things considered.
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If there’s no monitor connected, then the X server doesn’t know quite what to do.
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The Arduino analogWrite() function does all the heavy lifting to set the PWM machinery for normal use, followed by the tweakage for my purposes.
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Because we’ll get an interrupt for each click in either direction, we can’t simply look at the B input to tell which way the knob is turning.
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Bottom line: when you use fixed-point arithmetic, make sure you check the low end for underflow and the high end for overflow.
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Even if you RTFM, apply painstaking logic, and wire very carefully, there’s a 50% chance that the knob will turn the wrong way.
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A dab of PTFE lubricant on the latch and strike plate makes the storm door close exceedingly smoothly
The Smell of Molten Projects in the Morning 