Gravity: Voice Recorder Module -WTR096 V2.0

Gravity Voice Recorder Module V2.0 is a compact embedded audio recording board designed for quick voice capture and playback in interactive electronics. The small audio module records sound while a button is pressed and stores up to 20 seconds of audio for immediate playback through an external speaker. A 16KHz sampling frequency provides clear voice reproduction, while the wide 3.3V–5V operating range supports integration with common development platforms such as Arduino. This compact sound playback module suits interactive installations, educational prototypes, robotics alerts, and DIY electronic builds requiring simple recorded audio output.

Note: Key aspects such as the 100,000 repeatable recording cycles, physical dimensions (37mm × 35mm), and core functionalities including single‑button recording and the 3‑pin digital interface remain consistent with the previous generation. The current version extends recording time to 20 seconds, increases the sampling frequency to 16KHz, and expands the operating voltage range to 3.3V–5V.

Effortless Single‑Button Audio Recording

A built‑in recording trigger enables immediate sound capture with a simple press‑and‑hold action. Audio recording begins when the button is pressed and stops upon release, storing the captured sound for later playback. This intuitive control method eliminates complex configuration, making the embedded voice recording board convenient for rapid prototyping, sound tagging, and interactive hardware projects where quick audio input is required.

Clear 16KHz Audio Playback with Flexible Output

The embedded sound recorder stores up to 20 seconds of audio and reproduces recordings through external speakers. Support for an 8Ω 3W speaker or active speaker enables flexible amplification options depending on the application environment. The upgraded 16KHz sampling rate significantly improves voice clarity compared with earlier versions, producing more intelligible sound output for announcements, alerts, or short voice prompts.

Digital Interface for Microcontroller Control

A 3‑pin digital interface allows the interactive audio module to connect directly with microcontrollers and embedded control systems. Playback can be triggered programmatically through digital signals, enabling automated voice feedback or conditional sound effects in robotics, smart devices, and interactive installations. This digital trigger capability transforms the small recording board into a programmable audio response component for embedded electronics.

Compact Hardware with Long Recording Lifespan

The miniature recording board measures only 37mm × 35mm, allowing convenient installation inside enclosures or compact prototypes. Support for up to 100,000 recording cycles ensures reliable long‑term operation in frequently updated applications such as message devices or demonstration systems. Durable construction and small footprint make the module well suited for embedded audio projects where space and reliability are critical.

Figure: Wiring diagram of Gravity Voice Recorder Module

Recommended external speaker: JST-2P 3W8Ω Speaker.

Compact audio recording electronics such as this embedded voice playback module are widely used in robotics prompts, interactive exhibits, educational demonstrations, talking devices, and custom notification systems. Simple recording control combined with programmable playback makes the hardware suitable for prototyping smart gadgets, STEM learning projects, and responsive embedded systems that require short recorded audio messages.