Raspi Voice HAT Dual Microphone Expansion Board For AI Voice Applications For Raspberry Pi 4B

Raspi Voice HAT Dual Microphone Expansion Board For AI Voice Applications For Raspberry Pi 4B

Overview:
Raspi Voice HAT is a dual-microphone expansion board for Raspberry Pi specially designed for AI and voice applications. Now you can build a more powerful and flexible voice product that integrates devices for Amazon Amazona voice service, Google Assistant, Baidu AI, etc.

The board is an audio module designed based on that for Raspberry Pi. It uses the WM8960 low-power stereo codec, which is controlled by the I2C interface, and the audio is transmitted through the I2S interface. There are two microphones on both sides of the circuit board to collect sound. It also provides 12 APA102 RGB LEDs and an onboard speaker, and provides a user button and an I2C interface for expanding applications.

In addition, the on-board 3.5mm audio jack or 2.0 speaker output for JST can be used for audio output, and music can be played through an external headset, and it can also be played with an external speaker through the dual-channel speaker interface. There is a high-quality MEMS silicon microphone on the left and right sides of the board, which can record in stereo.

Features:
- Supply voltage: 5V
- Logic voltage: 3.3V
- Audio codec chip: WM8960
- Control interface: I2C
- Audio interface: I2S
- Expansion interface: 1 x I2C, 1 x button
- Power interface: 1 x Type-C interface (5V)
- LED interface: 12 APA102 programmable RGB LEDs, connected to SPI interface
- DAC SNR: 98dB
- ADC SNR 94dB
- Headphone driver: 40mW (16Ω at 3.3V)
- Speaker driver: 1W per channel (8Ω BTL) (onboard mono speaker)

Product Specifications:
- Working voltage: 5V
- Interface: I2S
- Size: 65 x 56 x 21mm

Product Interfaces Introduction:
LP and LN correspond to the positive and negative poles of left speaker respectively; RP and RN correspond to the positive and negative poles of right speaker respectively.

Function Pin         Pin For Raspberry Pi (BCM)                         Description
5V                                          5V                                      Power supply positive (5V power supply input)
GND                                     GND                                         Power supply ground
SDA                                   P2/SDA                                           I2C data input
SCL                                    P2/SDA                                          I2C clock input
CLK                                       P18                                            I2S bit clock input
LRCLK                                   P19                                           I2S frame clock input
DAC                                      P21                                           I2S serial data output
ADC                                      P20                                            I2S serial data input
BUTTON                            P29 or P31                                         custom buttons

Product Using:
http://ukonline2000.com/?p=1207

Package Included:
- 1 x Raspi Voice HAT