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Of late, the magnetic stirrer mixing my morning cocoa occasionally doesn’t start spinning when I turn it on, which calls for some investigation. Removing the four obvious screws concealed under the rubber feet and prying off bottom cover reveals the trivial innards: The speed adjustment pot holds the little circuit board in place, with the…
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The fix is the same as in 8.10… as described there.
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It’s not hermetic and certainly doesn’t have perfect conduction around the joints.
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I’m not sure what to make of this, other than that location is everything.
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For any particular Arduino Pro, I think you could very accurately compensate the initial frequency error by measuring the actual oscillator frequency and then hardcoding the adjustment value.
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Alas, QCAD wasn’t showing any of the printers.
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I just replaced an Energizer lithium cell that I installed on 19 March 2008
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A bit of diagnostic winnowing revealed a ding on one side of the CD’s hole
The Smell of Molten Projects in the Morning 