I'm trying to control a 9v audio signal through a self made optocoupler(200k dark LDR and random blue LED, temporarily). They're all taped up together and dont seem to be getting any interference. The LDR is in parallel with a 10kohm resistor as I need a linear 0-10k resistance. But I'm having a re…

Linear resistance through optocoupler

stoopkid October 7, 2011, 6:52am 8

Would it help much to just get a real optocoupler? Would this work?

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