Audio Expansion Module for Raspberry Pi Pico Stereo Decoder Speaker and Headphone Support
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Audio Expansion Module for Raspberry Pi Pico Stereo Decoder Speaker and Headphone Support
Pico-Audio is an advanced audio expansion module designed specifically for Raspberry Pi Pico. Equipped with the energy-efficient PCM5101A stereo decoder, it utilizes the I2S bus for digital signal transmission.
Key Features:
- Standard header compatible with Raspberry Pi Pico series (stackable design)
- Built-in 3.5mm Jack for connecting external headphones
- Dual-channel speaker output for direct speaker control
- Supports a wide range of sampling rates: 8 ~ 384000 Hz
- High-quality stereo sound output
- Uses 3-wire I2S bus, effectively reducing EMI interference
- Development support available (audio playback examples, sound card support)
Raspberry Pi Pico Compatibility
The module features female headers for direct Raspberry Pi Pico attachment and male pins for stacking additional modules.
Board Components Description
- Speaker connector: 2 channels, 4-wire
- SMD Potentiometer: Speaker output volume adjustment
- Test points: Audio decoder outputs for signal observation
- 3.5mm Jack: Standard headphone output
- RT9193-33: 3.3V linear regulator
- PCM5101A: Audio decoder, I2S bus (3-wire)
- APA2068: Audio power amplifier
- Raspberry Pi Pico connector: For microcontroller connection, stackable design
Technical Specifications
- Operating voltage: 5V
- Logic level: 3.3V
- Audio decoder: PCM5101A
- Audio bus: I2S
- DAC SNR: 106 dB
- Speaker output power: 2.6W per channel (4Ω BTL)
- Sampling support: 8~384000 Hz
Pinout Definition
Dimensions
Kit Contents
- Pico-Audio x1
- 8Ω 5W Speaker x1
Note: Raspberry Pi Pico is not included in the kit.
