走马观花

PCM5102A decoder board for NanoPI NEO/NEO2

Overview

NanoPI NEO/NEO2 is a very compact development board. The manufacturer has developed a decoding board for supporting use, but this decoding board is not easy to buy, and it has RCA output, which is not suitable for compact use. Basically, I re-drawed a board according to the schematic diagram provided by the manufacturer, and added 4 buttons to expand the control functions.

See here for usage and introduction: https://wiki.friendlyelec.com/wiki/index.php/NanoHat_PCM5102A/zh

The board was laid out smoothly and soldered.

The selection of components is somewhat different from that of the manufacturer. Be prepared to pick up.

Smooth voice.

However, even if I use a linear power supply and connect it to an amplifier for listening, it still doesn’t sound very good. Later I made a board with separate AMS1117 power supplies for digital and analog circuits, but there didn’t seem to be any improvement. I don’t know if it was due to the selection of components. The bad thing is that the circuit design is not good. Then forget about listening to the 1794 decoder...the planned functions of button volume control and playback have not been developed (in fact, I don't know how to write this program yet -_-!).

Design Files

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Update:2025-06-23 17:31:49

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