[sdiy] Re: Vactrol (opt align) VCF rev 2: help needed

[René Schmitz]

HI Jürgen, Harry and all,

jhaible at debitel.net wrote:
>>optical alignment isn't guaranteed... the LED might strike one half more
>>effectively.
> 
> 
> Good point, Harry, I didn't think about that!
> So mouting LDRs on EL panels may still have some advantage
> over LED/LDR vactrols even today!


Apart from that, there might also be minute variation in the thickness 
of the photosensitive coating. Most LDRs are based on a piece of 
ceramic, where the coating is applied like a laquer.

Cheers,
  René

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159