[sdiy] LED/LDR modules

[Joachim Verghese]

Hi,

> Silonex do a useful range.  Prices start around £1 (1 UK pound)
> each from Farnell.  I bought a batch of ten last year and managed
> to select several pairs that matched over a useful range.  I've seen
> them used in Focusrite opto compressors and de-essers.

I've also seen them in products by Dunlop (MXR Phase 100 reissue)
and Motion Sound (R3-147 rack mount rotating speaker).

BTW, isn't it reassuring to see these comparatively lo-tech
optoelectrical components being used in current commercial products?
Not that I'm anti-DSP or anything, but lo-tech has charm (and usually 
sounds good, too)!

> Data sheets were available on the Silonex website last time I looked.
> I think it's www.silonex.com, but if it isn't, it shouldn't be difficult
> to find.

That's correct, and to recap:

http://www.silonex.com/datasheets/index.html
(Scroll down to "optocouplers")

Vactrols:
http://opto.perkinelmer.com/products/catalog/familylisting/family699.asp
(they used to have datasheets, but...)

Clairex:
http://www.clairex.com/shortform.asp?category=Optocouplers&Page=1

Hamamatsu:
http://usa.hamamatsu.com/opto-semi/hybrid/p873.htm
http://www.hpk.co.jp/hp2e/products/ssd/CPRE/CouplerE.htm

-joachim