ISD1820 Voice Recording Module

The ISD1820 module is a compact, easy-to-use voice recording and playback system designed for embedded audio applications. Based on the ISD1820 IC, it allows users to record up to 10 seconds of audio directly via the onboard microphone and play it back using push-button controls or external triggers. Its simple interface and low power requirements make it ideal for DIY electronics, toys, alarms, and voice-activated systems.

🔧 Key Features:

• Onboard microphone for direct voice input
• Record/playback buttons for manual control
• Supports up to 10 seconds of non-volatile audio storage
• Three playback modes:
  • PLAYE: Edge-triggered playback
  • PLAYL: Level-triggered playback
  • REC: Record button for audio capture
• Speaker output: Direct connection to 8Ω speakers via onboard amplifier
• External control pins: Compatible with Arduino, Raspberry Pi, and other microcontrollers
• Low power operation: 3V–5V DC input
• Compact form factor: Easily integrates into small enclosures or project boards

🔌 Pinout Overview

• VCC / GND: Power supply input (3–5V DC)
• REC / PLAYE / PLAYL: Control inputs for recording and playback modes
• FT: Feed-through mode for real-time audio pass-through
• SP+ / SP-: Speaker output terminals
• MIC: Onboard microphone for voice capture

📦 Applications

• DIY talking toys and greeting cards
• Voice-triggered alarms and alerts
• Educational electronics and STEM kits
• Interactive exhibits and sound effects modules
• Embedded voice prompts in consumer devices