[sdiy] sin/cos pot (was: Elektron Digitakt teardown)

[Ove Ridé]

On Monday, 10 July 2017, Michael Zacherl <sdiy-mz01 at blauwurf.info> wrote:

> How would you tell the direction of the movement?
>

There are two tracks shaped as cos and sin. If you graph one rotation, you
would get cos and sin, aka sin and 90 degree out of phase sin. Another (in
this case helful) representation is the unit circle, where the x and y axis
are repreented by cos and sin. Since every position on the pot is indexed
uniquely by an angle (that is, each pair of values is unique to a single
angle) everything else follows naturally. It's a quadrature source and you
could also draw direct a comparison to a rotary encoder, which essentially
does thesame thing, but per step instead of full cycle, and discrete
instead of continuous.


-- 
/Ove

Blog: <http://blog.gg8.se/>

"Here is Evergreen City. Evergreen is the color of green forever."
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