Is there such a thing as...

[David]

I'm wondering if the following component exists.  I can make it (and probably will have to), but I just wanted to see if it existed...

I know there is a Vactec optocoupler that has one LED driving two LDRs.  However, IIRC, those LDRs are in series so they look like a pot.  I'm curious to see if there is an analogous device where one LED drives two fully-independent LDRs.

[mdh]

The  Hamamatsu P873-13 (Small Bear has it) is like that.  It's the photocoupler that's used in the Mutron III envelope filter.

[David]

Nice catch, Matt.  Thanks!

Pricey little cuss, though...   

[Mark Hammer]

What would be wonderful would be a 2-LED/2-LDR unit that resulted in one LDR going lower in resistance when the other went higher.  The two LDRs could then be linked at a virtual "wiper".

[biggy boy]

So something like the circiut on the left, but make it with pots to ajust the flash rate and depth.
Then jam two LDRs up to the LEDs?

[mdh]

Nice catch, Matt.  Thanks!

Pricey little cuss, though...   

Yup.  I plunked down for one when I built my Mutron III clone, because I didn't want to mess around with the other options, and I had already wasted more than $7.25 of time messing around with horribly matched single optos on the breadboard.