The ISD1820 Voice Recording and Playback Module is a compact, reliable, and versatile audio solution designed for DIY electronics projects, embedded systems, and educational applications. With its built-in microphone, 0.5W speaker, and user-friendly development board, this module enables you to easily record, store, and play back short voice messages without requiring complex programming or external audio processors. Whether you are prototyping interactive devices, creating voice-enabled systems, or building hobby electronics, the ISD1820 offers an affordable and practical solution for sound recording and playback functions.

Engineered around the ISD1820 voice IC, this module supports recording durations of up to 10 seconds with high-quality audio output. It comes preconfigured with push buttons for direct recording and playback control, making it suitable even for beginners. For advanced users, the module can also be interfaced with microcontrollers such as Arduino, Raspberry Pi, or STM32, allowing for enhanced control and integration into larger electronic systems.

Key Features

• Integrated Recording & Playback: Built-in ISD1820 chip allows easy recording and playback of up to 10 seconds of audio.

• High-Quality Audio Output: Includes a 0.5W mini speaker for clear and audible sound reproduction.

• Simple Control Options: Onboard push buttons for REC, PLAYE (edge-triggered playback), and PLAYL (level-triggered playback).

• Microphone Included: Comes with an onboard electret microphone for direct voice input.

• Stand-Alone & MCU Compatible: Works independently with push buttons or can be controlled by microcontrollers (Arduino, Raspberry Pi, STM32, ESP32).

• Low Power Consumption: Efficient design makes it ideal for battery-powered and portable projects.

• Wide Applications: Perfect for DIY electronics, robotics, security alarms, educational kits, and voice-assisted devices.

• Compact Development Board: Easy-to-use module with clear pin headers for simple integration into circuits.

Technical Specifications

• Chipset: ISD1820 voice recording IC

• Recording Duration: 8–10 seconds (typical)

• Control Modes:

  • REC: Start/stop recording

  • PLAYE: Playback (edge-triggered, plays message once)

  • PLAYL: Playback (level-triggered, plays while button held)

• Audio Output: 0.5W, 8Ω mini speaker included

• Audio Input: Onboard electret condenser microphone

• Power Supply Voltage: 3V to 5V DC

• Interface Compatibility: Direct push buttons and microcontroller I/O pins

• Playback Quality: Clear voice with good intelligibility

• Operating Modes: Stand-alone operation or MCU-controlled operation

• Board Dimensions: Approx. 38mm × 42mm (varies slightly by manufacturer)

• Additional Features: Onboard headers for external connections, adjustable resistor for mic sensitivity

Applications

The ISD1820 recording and playback module is widely used across educational, hobbyist, and professional environments. Its versatility makes it suitable for:

• DIY Electronics Projects: Add sound effects or voice prompts to your prototypes.

• Robotics: Enable your robot with voice commands, sound notifications, or recorded messages.

• Security Systems: Integrate voice alerts or custom warning messages for alarms.

• Toys & Learning Kits: Use in interactive toys, talking devices, or electronic teaching aids.

• Home Automation: Implement voice reminders or custom alerts in smart home projects.

• Embedded System Development: Ideal for rapid prototyping and testing sound integration in embedded designs.

Why Choose the ISD1820 Voice Module?

• Ease of Use: No programming required for basic operation—simply press the record and play buttons.

• Expandable: Can be connected to external circuits and microcontrollers for advanced use cases.

• Reliable Performance: Delivers consistent audio recording and playback without distortion.

• Cost-Effective: Affordable solution compared to complex digital audio systems.

• Educational Value: Great for learning how audio recording and playback circuits function in real applications.