Author Archives: Andrew

3D Printable Rear Case Cover for Raspberry Pi + Wolfson Card + PiHut case

Posted on April 18, 2018 by Andrew

I drafted a design for a new rear case cover for the Pi Hut case for the Raspberry Pi official 7″ touchscreen The Wolfson Card I fitted here prevents fitting of the original rear case cover, so I drafted up … Continue reading →

Posted in Engineering, Gadgets, Music, Streaming | 1 Comment

The Wolfson Sound Card Noise Gate and 24 bit Data

Posted on March 31, 2018 by Andrew

Recently I did some measurements on the Wolfson card to get an idea of the dynamic range. When playing a 24bit file @ -100dBfs there was no output from the card. This was perplexing, as the noise floor is some … Continue reading →

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Improving PSU filtering on the Wolfson Raspberry Pi Sound Card

Posted on March 25, 2018 by Andrew

I’ve been thinking about elegant ways to improve the PSU filtering of the Wolfson card and to ensure that any switching noise from the relatively noisy power supplies Raspberry Pi’s are usually used with is effectively filtered. There’s plenty of possible … Continue reading →

Posted in Engineering, Music, Streaming | 6 Comments