ISD1820 voice recording module
The ISD1820 Voice Recording Module is a compact and easy-to-use audio recording board capable of capturing up to 10 seconds of high-quality voice. Featuring an onboard microphone, loudspeaker output, and the ISD1820 chip, it supports direct recording, loop playback, jog playback, and single-pass playback modes. Operating on 3V–5V, it is fully compatible with Arduino, Raspberry Pi, and other microcontrollers, making it ideal for DIY audio projects, toys, alarms, and interactive electronics.
وحدة تسجيل الصوت ISD1820 هي لوحة تسجيل صوتي مدمجة وسهلة الاستخدام، قادرة على تسجيل ما يصل إلى 10 ثوانٍ من الصوت بجودة عالية. تتميز بـ ميكروفون مدمج ومخرج لمكبر الصوت وشريحة ISD1820، وتدعم وضعيات التسجيل المباشر والتشغيل المتكرر والتشغيل المتقطع والتشغيل لمرة واحدة. تعمل بجهد 3 - 5 فولت، وهي متوافقة مع Arduino وRaspberry Pi والمتحكمات الأخرى، مما يجعلها مثالية لمشاريع الصوت اليدوية والألعاب وأجهزة الإنذار والإلكترونيات التفاعلية.
The ISD1820 Voice Recording and Playback Module is a versatile audio module designed for hobbyists, students, and engineers who want to add voice recording and playback capabilities to their electronic projects. Built around the popular ISD1820 chip from Nuvoton, this module offers natural-sounding voice reproduction, making it a reliable solution for any project requiring real human-voice output.
The module comes with an integrated electret microphone, allowing the user to record audio directly without needing any additional input device. Recording duration is set to a default of 10 seconds, with sampling frequencies adjustable through external resistors for those who want to fine-tune audio quality versus recording length. Recorded messages are stored automatically and remain in memory even after power-off thanks to the chip's non-volatile storage.
Playback is supported in three flexible modes: PLAYE (single-pass), PLAYL (loop play with hold), and jog playback for repeated triggering. All major control pins are broken out to header pins, enabling microcontroller-based control via Arduino, Raspberry Pi, ESP32, or any 3.3V/5V logic system. An onboard 8-ohm speaker output is included for direct sound reproduction, eliminating the need for an external amplifier in most use cases.
Powered by a simple 3V to 5V DC supply, the ISD1820 module is plug-and-play, beginner-friendly, and an excellent introduction to audio electronics.
Specifications
- Main IC: ISD1820 voice recording chip
- Recording Duration: 10 seconds (default; adjustable via external resistor)
- Sampling Frequency: 3.2 kHz (default)
- Operating Voltage: 3V – 5V DC
- Onboard Microphone: Electret condenser type
- Speaker Output: Direct drive for 8Ω / 0.5W speaker
- Memory Type: Non-volatile (retains audio after power-off)
- Control Modes: REC, PLAYE (single-pass), PLAYL (loop), Jog playback
- Interface: Standard header pins for microcontroller control
- Module Dimensions: 54mm × 38mm
Features
Applications
- DIY Voice Recorders and personal memo devices
- Interactive Toys and Greeting Cards with custom voice messages
- Smart Doorbells and announcement systems
- Voice-Activated Alarms and security alerts
- Robotics Projects requiring spoken feedback or sound effects
- Educational STEM Kits teaching audio electronics and microcontrollers
- Arduino and Raspberry Pi voice-based applications
- Museum Exhibits and Kiosks with short recorded narration
- Accessibility Devices for users with reading or speech difficulties
- Industrial Notification Systems for short voice prompts
- Home Automation projects with audible status updates
- Prototyping and Hobby Projects that need quick voice integration