Interfacing 100 pulses per rev control knobs

[JohnHaine]

Which processor? Arduino? Is there a library you could use?

[Robin Hewitt]

Which processor? Arduino? Is there a library you could use?

I am using a pre-cambrian processor, hopefully without the explosion, the amazing Hitachi HD64180

Robin

[Voicecoil]

I seem to remember that there's a hardware solution using a couple of exclusive OR gates and a counter.....

[JohnHaine]

I seem to remember that there's a hardware solution using a couple of exclusive OR gates and a counter.....

Yes there is, and maybe a D-type flip-flop too to sense direction. (XOR gates just double the pulse rate.) But you then still need to accumulate the pulses with an up/down counter and convert the counter to analogue to emulate the pot.

If there's a C compiler for the processor I guess it should be possible to modify the library code.