On 08/12/2013 02:18 AM, Phil Allison wrote:

"Leif Neland"
Phil Allison har bragt dette til os:

DJ mixers have a "cross-fader " that allows a pair of stereo channels to
be mixed in any proportion. Most DJs work the ring of the things - so
much so that it is standard practise make the cross-fader a "user
replaceable" module fitted on sub panel that slots into the main panel.

Are anyone using an optical fader, where moving the fader allows more or
less light to a sensor, controlling the fading?

Or should I file a patent claim? :-)


** I built such a set up for a customer in the mid 1980s.

Worked like a charm.

A few high end DJ desks have optical or VCA x-faders.


.... Phil

Hall-effect feels left out now.

http://www.electronicproducts.com/Pa...vs_sensor.aspx