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Updated answer 01/23/2017:

Maybe this is an answer: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cirDigital Optical Volume Control with LED and photoresistor (light to seperate circuits, optical pot)

Using light to control the 'fades'/volume of each channel by using a LED and photoresistor(s). You can simply control the LED with an Arduino. Because of the LED is driven by PWM, you need to change the PWM frequency. See also example at my answer (and the reason why).

I made some drafts/examples at my question, my question is about if there is component that combines the two. There is, called vectrols but they are very expensive. You can make your own, it's cheap! More info and pictures at my question and answer.

Changed and simplified schematic:

vactrol-volume

More info at my question: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cirDigital Optical Volume Control with LED and photoresistor (light to seperate circuits, optical pot)

Updated answer 01/23/2017:

Maybe this is an answer: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Using light to control the 'fades'/volume of each channel by using a LED and photoresistor(s). You can simply control the LED with an Arduino. Because of the LED is driven by PWM, you need to change the PWM frequency. See also example at my answer (and the reason why).

I made some drafts/examples at my question, my question is about if there is component that combines the two. There is, called vectrols but they are very expensive. You can make your own, it's cheap! More info and pictures at my question and answer.

Changed and simplified schematic:

vactrol-volume

More info at my question: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Updated answer 01/23/2017:

Maybe this is an answer: Digital Optical Volume Control with LED and photoresistor (light to seperate circuits, optical pot)

Using light to control the 'fades'/volume of each channel by using a LED and photoresistor(s). You can simply control the LED with an Arduino. Because of the LED is driven by PWM, you need to change the PWM frequency. See also example at my answer (and the reason why).

I made some drafts/examples at my question, my question is about if there is component that combines the two. There is, called vectrols but they are very expensive. You can make your own, it's cheap! More info and pictures at my question and answer.

Changed and simplified schematic:

vactrol-volume

More info at my question: Digital Optical Volume Control with LED and photoresistor (light to seperate circuits, optical pot)

3 Added an update
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Updated answer 01/23/2017:

Maybe this is an answer: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Using light to control the 'fades'/volume of each channel by using a LED and a photoresistor(s). You can simply control the LED with an Arduino. I know, a photoresistorBecause of the LED is slower than a photodiodedriven by PWM, but maybe it makes it more smooth and avoids hearable digital stepsyou need to change the PWM frequency. It feels like analog and circuits are completely separatedSee also example at my answer (and the reason why).

I made some drafts/examples at my question, my question is about if there is component that combines the two. There is already an answer that mention some partnumbers, called vectrols but they are very expensive. You can make your own, it's cheap! More info and picurespictures at my question and answer.

Digital Optical Volume Control (Quick Draft) Changed and simplified schematic: Digital Optical Volume Control - Quick Draft

vactrol-volume

More info at my question: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Maybe this is an answer: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Using light to control the 'fades'/volume of each channel by using a LED and a photoresistor. You can simply control the LED with an Arduino. I know, a photoresistor is slower than a photodiode, but maybe it makes it more smooth and avoids hearable digital steps. It feels like analog and circuits are completely separated.

I made some drafts/examples at my question, my question is about if there is component that combines the two. There is already an answer that mention some partnumbers. More info and picures at my question.

Digital Optical Volume Control (Quick Draft): Digital Optical Volume Control - Quick Draft

More info at my question: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Updated answer 01/23/2017:

Maybe this is an answer: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Using light to control the 'fades'/volume of each channel by using a LED and photoresistor(s). You can simply control the LED with an Arduino. Because of the LED is driven by PWM, you need to change the PWM frequency. See also example at my answer (and the reason why).

I made some drafts/examples at my question, my question is about if there is component that combines the two. There is, called vectrols but they are very expensive. You can make your own, it's cheap! More info and pictures at my question and answer.

Changed and simplified schematic:

vactrol-volume

More info at my question: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

2 Edit link
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Maybe this is an answer: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir/266541#266541http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Using light to control the 'fades'/volume of each channel by using a LED and a photoresistor. You can simply control the LED with an Arduino. I know, a photoresistor is slower than a photodiode, but maybe it makes it more smooth and avoids hearable digital steps. It feels like analog and circuits are completely separated.

I made some drafts/examples at my question, my question is about if there is component that combines the two. There is already an answer that mention some partnumbers. More info and picures at my question.

Digital Optical Volume Control (Quick Draft): Digital Optical Volume Control - Quick Draft

More info at my question.: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Maybe this is an answer: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir/266541#266541

Using light to control the 'fades'/volume of each channel by using a LED and a photoresistor. You can simply control the LED with an Arduino. I know, a photoresistor is slower than a photodiode, but maybe it makes it more smooth and avoids hearable digital steps.

I made some drafts/examples at my question, my question is about if there is component that combines the two. There is already an answer that mention some partnumbers. More info and picures at my question.

Digital Optical Volume Control (Quick Draft): Digital Optical Volume Control - Quick Draft

More info at my question.

Maybe this is an answer: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

Using light to control the 'fades'/volume of each channel by using a LED and a photoresistor. You can simply control the LED with an Arduino. I know, a photoresistor is slower than a photodiode, but maybe it makes it more smooth and avoids hearable digital steps. It feels like analog and circuits are completely separated.

I made some drafts/examples at my question, my question is about if there is component that combines the two. There is already an answer that mention some partnumbers. More info and picures at my question.

Digital Optical Volume Control (Quick Draft): Digital Optical Volume Control - Quick Draft

More info at my question: http://electronics.stackexchange.com/questions/266536/digital-optical-volume-control-with-led-and-photoresistor-light-to-seperate-cir

1
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