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Old 06-19-2018, 06:31 PM   #1
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Default Arduino and interrupts with rotary encoder

I want to control a Si5351a dds using a 200ppr optical rotary encoder. All the previous examples I have seen just use the bog standard 16ppr mechanical encoders.
I have looked at the options and using interrupts seem to be the best - does anyone know if an arduino can handle the speed of such an encoder?
Paul's optimised library seems ideal but using a teensy 3.2 just for this looks like overkill - I'd rather just use a nano clone but its not clear if this
library is just for teensy . Any advice before I start?
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Old 07-24-2018, 04:15 PM   #2
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Is the Si5351a the engine? (could not find it with a quick search)
It depends on how fast the decoder rotates (engine speed), and how much work should be done in the ISR (keep it short) and the processor clock speed for the standard Nano, which will be 16 MHz.
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