Ths project may be of interest:
DIY "Lightspeed Attenuator" - Passive LDR Volume Control (audio optocouplers)
By adding 4 more of the optical elements to the potentiometer a 6 channel attenuator will result - see Fig. 2. (See next link).
Matched LDRs are available from the author of the project - I have no connection with this offer.
http://diyaudioprojects.com/Forum/vi...php?f=13&t=785
Cheers, Marshall.





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