[sdiy] Verniers for Patch Recording

[Ian Fritz]

At 05:23 AM 10/1/2003, Czech Martin wrote:

>My eyesight is not so good, and I fear it won't get
>any better. So *for me personally* it seems to be no sufficient
>solution. Also I had/have always problems reading slide
>rulers etc., I find it difficult to interpret the vernier
>(even with better eyes). I also think that the 10 turn
>dials are difficult to read.

I certainly sympathize with eyesight limitations.  The scales I've been 
experimenting with seem about as easy to read as ordinary print.  I'm 
deliberately keeping them fairly coarse, to avoid having to get real close 
and squint, like I have to do with my vernier calipers..

>Perhaps larger dials are possible. More resolution, but also
>more space.
>There are knobs with a scale printed on them,
>so the panel needs only an arrow (you can read
>1.2, 1.4, 1.6, 1.8 and so on). These knobs are not cheap.
>2.35 EUR each. See scale.jpg.

Those are nice looking knobs.  But they are expensive and take up quite a 
bit of real estate.  How big are they?

>My idea of fine and coarse does of course not work.
>Obviously the problem applies also to the coarse pot
>which has also the most influence.
>
>Perhaps a mixed approach is possible: the usuall scales
>and knobs for most modules, and a special atenuator
>module that offers 10 turn, or large dials, or scaled knobs
>or vernier knobs or digital pots.
>
>The idea is that perhaps yoiu do not need high resolution
>everywhere at the same time.

Right.  No need to do everything exactly the same way.

   Ian