[sdiy] Small Resistors and slider pots

[Don Tillman]

   From: "J. Larry Hendry" <jlarryh at iquest.net>
   Date: Tue, 3 Apr 2001 20:11:37 -0500

   Not exactly.  But, when I was in high school (many years ago) I played
   in a band and used a Farsisa VIP233 keyard.  The volume pedal was optical
   However, the variance method was different.  It used a fixed light source
   and a fixed light sensing device.  The pedal pushed a piece of metal or
   some other material between the fixed source of light and pick up that had
   a slot that was very narrow at one end and got wider at the other to let in
   more light.

The Morley volume and wah pedals have always touted this as their big
feature.  The one Morley pedal I ripped apart had a wide strip of dark
cloth between the light bulb and the photocell.  Stepping down on the
pedal unwrapped the strip of cloth to cover the light path.

http://www.morleypedals.com

(Morely is now owned by the same company that make Accutronics
spring reverb tanks.)

  -- Don

-- 
Don Tillman
Palo Alto, California, USA
don at till.com
http://www.till.com