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/diy/ - Do-It-Yourself

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>> No.1612849 [View]
File: 29 KB, 600x325, fet_optocoupler_potmeter_100.jpg [View same] [iqdb] [saucenao] [google] [report]
1612849

>>1612839

nope. you can use optocouplers to send analog signals. use a DC voltage to bias the LED on, then AC couple your signal on top of that. a vintage gadget called a vactrol was often used for this purpose.



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