LORDWORLD Audio Module Expansion Board for Raspberry Pi Pico PCM5101A

Raspberry Pi Pico Audio Expansion

The LORDWORLD expansion board adds stereo audio output to a Raspberry Pi Pico through a PCM5101A decoder. It mounts directly on the standard Pico header and provides both a 3.5 mm headphone jack and dual speaker headers for concurrent use. Developers receive sample code for audio playback and sound-card implementation. The board targets makers who need a compact, ready-to-run audio front-end for Pico projects.

I2S Interface and Sampling Limits

Audio data moves over a three-wire I2S bus, a choice that helps keep electromagnetic interference low. The decoder accepts sample rates from 8 Hz up to 384000 Hz, so the same hardware can handle voice-grade prompts or high-resolution music streams. Projects that require multi-channel surround or digital audio outputs such as S/PDIF will need a different solution because this board only exposes analogue stereo.

Build and Daily Connections

The board uses the standard Pico pin header, so it stacks without extra wiring and leaves the remaining GPIO pins accessible for other hats. A 3.5 mm jack handles headphones while two pin headers drive passive speakers directly, letting you switch between private listening and room audio without re-soldering. The compact footprint fits inside most Pico-sized enclosures, though builders who need line-level RCA or balanced outputs must add external circuitry.