On 18 Jan 2004 21:51:35 -0800, the renowned email@example.com (Greg)
Just use two inputs (for quadrature) with 2K~10K pullups. Makers often
recommend an RC on each input, but it's not necessary with debounce
done in sofware and good ESD design.
On ones like the above, use another input for the push switch. You
need to poll at about 400Hz for good results with this type of
encoder. It's also possible to use interrupts, triggered from the B
line, but it's not as good.
"it's the network..." "The Journey is the reward"
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