[sdiy] optocouplers/Vactrols

[Metrophage]

I don't prefer any yet, I am just getting into them, like it sounds you
are. Each manufacturer makes units with various respective resistances
and response times.

Clairex and Hamamatsu appear to be dropping their production of many,
if not all, analog photocouplers. There are still quite a few out
there. Compare specs for the values you need!

CJ


--- Paul Higgins <higg0008 at tc.umn.edu> wrote:

> Hi all,
> 
> I was wondering what optocouplers (LED/LDR combo) list members
> prefer.  
> I've certainly used the PerkinElmer (formerly EG&G/Vactec) Vactrols
> and 
> have made some DIY models as well.  I'm waiting to see if I can get 
> some samples of the Silonex (Audiohm) couplers.  I remember Hamamatsu
> 
> (sp?) was mentioned on the list some time ago, but all I can find on 
> their site is info on their LDRs (which of course would still be
> useful 
> for DIY couplers).  I also know that I can get some of the Clairex
> LDRs 
> from either Digi-Key or Mouser, I forget which.
> 
> I recall the response time being a potential issue with the Hamamatsu
> 
> parts (as fast as OTAs/VCAs), whereas the Audiohm couplers seem to be
> 
> in the same range as many of the Vactrol parts, maybe a bit slower.  
> (Rise times for Audiohm parts seem to be in the 3-6 ms range).
> 
> Thanks,
> -PRH
> 
> 



		
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