Atomic Audio-3.5 Base is a voice recognition and audio playback base designed for the Atom series controllers (not compatible with Atom Voice). It integrates an ES8311 mono audio codec, a MEMS microphone, and an NS4150B power amplifier, equipped with a standard 3.5mm audio jack and a 4-segment TRRS connector (CTIA standard) to support both audio output and microphone input. The ES8311 supports 24-bit audio resolution with a sampling rate range of 16kHz ~ 64kHz and communicates via the I2S interface, enabling high-fidelity audio processing. The onboard MEMS microphone offers a high signal-to-noise ratio and digital output capability, optimized for automatic speech recognition scenarios, while the integrated speaker delivers efficient audio output. This base supports full-duplex communication for simultaneous audio transmission and reception, making it suitable for applications such as voice assistants, voice control terminals, smart home voice gateways, and voice interaction devices. Features Built-in microphone and speaker 3.5mm audio jack Supports audio output + microphone input Built-in insertion detection with automatic switching to external microphone line Integrated ES8311 hi-fi audio codec, supporting 24-bit high-resolution audio processing Supports full-duplex voice communication with simultaneous audio transmission and reception Applications Atom expansion base DIY node controller Peripheral interface expansion Specifications: Audio Codec: ES8311 MEMS Microphone: ME1502AM5G Speaker: 1W@8Ω NS4150B Audio Interface: 3.5mm Headphone Jack (SMID-5P, 5-pin) Voltage Regulator: TPS7A2033PDQNR GPIO Expander: PI4IOE5V6408ZTAEX Power Consumption: Standby Mode: [email protected] Recording Mode: [email protected] 50% Volume Playback: [email protected] 100% Volume Playback: [email protected] Color: Gray Material: PCB+Plastic Package Contents: 1 x Atomic Audio-3.5 Base 1 x Hex Key L-Shape 1.5mm (For M2 Screw) 1 x M2 * 8mm cap head machine screw Only the above package content, other products are not