Hi folks,
I've finished and testet the first prototype of my 4-channel volume control. It is designed to be used in my 4-way active speaker project, but can be used for any other project. It features optocouplers for the digital control connection to decouple the circuit from the controller.
It uses a PGA4311 and a OPA1664 input buffer. No output buffer is used, because the circuit should be located near the power stage.
Control has been tested from an Arduino and from the RaspberryPi - both work well. I'm thinking about a specific controller board designed just for this project.
Any comments?
Regards
Daniel
http://www.crazy-audio.com
I've finished and testet the first prototype of my 4-channel volume control. It is designed to be used in my 4-way active speaker project, but can be used for any other project. It features optocouplers for the digital control connection to decouple the circuit from the controller.
It uses a PGA4311 and a OPA1664 input buffer. No output buffer is used, because the circuit should be located near the power stage.

Control has been tested from an Arduino and from the RaspberryPi - both work well. I'm thinking about a specific controller board designed just for this project.
Any comments?
Regards
Daniel
http://www.crazy-audio.com
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