![]() Note: I had some minor noise-issues with the boards. ![]() I recently realised I didn’t post these before and as the project they were meant for died somewhere along the way I am not sure I’ll ever pick these up again (at least not within the foreseeable future). ![]() I haven’t included any software in the download file, but there should be plenty of examples online that shows how to do this integration (especially for the Arduino).Īs even the not so keen-eyed observer will notice, this isn’t a new layout. The boards are intended to be controlled from an Arduino or a similar microcontroller via an SPI-interface. These aren’t actually digital, but just digitally-controlled resistor attenuators integrated on an IC – which doesn’t really matter anyway.Īs is often the case, there are two board versions: One is a “normal” stereo version with a single PGA chip onboard, the other is a balanced/multichannel version that has two chips onboard (for balanced setups) and the possibility to daisy-chain more boards (for multi-channel systems). A “digital” volume control based on the well-known PGA2310/PGA2311 ICs from TI.
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