The Shop > Electronics & IC Programing
hacking a tacho module?
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hopefuldave:
That would be simpler, but there's not really access in that direction... Holbrook packed a lot in the headstock, quite tightly, and still left the headstock nearly two feet long....

Just changing the crystal seems a lot less work, too!

Dave H. (the other one)
quantumeer:
Black up 10 of the teeth.  The obvious frequency counter circuit won't care that the pulses are irregular ;)  Or indeed, change its idea of how long a second is by changing the crystal.

Mark
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