[sdiy] preset panels

[Andre Majorel]

On 2005-08-26 15:23 -0400, Roy J. Tellason wrote:

> Since somebody mentioned those patch panels in here,  I thought I'd
> toss this out...
> 
> I've scrapped several VCRs recently,  older ones,  where you had a
> preset panel.  Got three of them sitting here at the moment.  Each has
> a set of switches,  typically 3-position and 14 or so of them,  and a
> multiturn trimpot for each position.
> 
> I *think* based on some examination that this stuff is arranged in a
> matrix, where some sort of a logic signal selects which of the
> switches are selected and which trimpot,  the output connections of
> which are all tied to some common point,  probably eventually fed to
> the tuner section of the VCR.
> 
> Seems to me this would also be usable for a sequencer,  perhaps.  The
> logic signal inputs could be stepped through,  and the pots could
> allow for the adjustment of some parameter or other as output.

Don't know about those, but I've seen presets that were rated for
something like 20 rotations. That's twenty, not twenty-thousand.

-- 
André Majorel <amajorel at teaser.fr>
http://www.teaser.fr/~amajorel/