ISD1820 Voice Recording Module + Speaker
Internal Reference:
KIT.ISD1820.VOICE
ISD1820 Voice Recording Module + Speaker
Product Description
The ISD1820 Voice Recording Module is a compact, easy-to-use audio recording and playback board featuring an SMD version of the ISD1820 chip. Designed for single-chip voice recording and playback, this module includes an onboard electret microphone for audio capture and direct speaker output to drive the included $8\Omega$ external speaker.
This module features integrated push-buttons for standalone operation (Record, Edge-Triggered Play, Level-Triggered Play) and header pins that allow seamless control via microcontrollers such as Arduino, Raspberry Pi, or STM32. It non-volatiles audio data, retaining stored recordings even when powered off. It is ideal for DIY voice prompts, greeting cards, alarm notifications, interactive toys, and robotic projects.
Key Features
- Onboard SMD IC & Microphone: Compact surface-mount design featuring an integrated high-sensitivity electret microphone for direct audio input.
- Standalone or Microcontroller Operation: Push-buttons on the board allow manual control, while side header pins allow microcontrollers to drive playback and recording.
- Non-Volatile Storage: Recorded voice/sound data is stored in internal flash memory without needing backup power.
- Multiple Playback Modes: Supports edge-triggered playback (plays full recording), level-triggered playback (plays while held), and pass-through mode.
- Direct Speaker Output: Built-in driver directly powers an $8\Omega / 0.5\text{W}$ mini speaker without requiring external amplification.
- Loop & Feed-Through Jumpers: Onboard jumper options enable continuous looping or direct real-time microphone-to-speaker pass-through (feed-through).
Product Specifications
- Main IC: ISD1820 (SMD Package)
- Operating Voltage: 3.0V – 5.0V DC
- Recording Time: 8 to 10 seconds (default sampling rate)
- Microphone Input: Onboard Electret Microphone
- Speaker Interface: 2-pin JST / Header output connector (Includes $8\Omega / 0.5\text{W}$ speaker)
- Dimensions: ~38 mm x 42 mm
Pinout & Connection Interface
- Header Pins (Control & Power):
- VCC: Power Supply (+3V to +5V DC)
- GND: Power Supply Ground
- FT (Feed Through): Connect to HIGH to pass microphone audio directly to the speaker.
- PLAYL (Play Level): Plays recording as long as signal stays HIGH; stops when LOW.
- PLAYE (Play Edge): Pulse HIGH once to play the entire recorded message.
- REC (Record): Active HIGH. Recording remains active as long as REC pin/button is held HIGH.
- Jumpers & Onboard Buttons:
- REC Button: Press and hold to record audio.
- PLAYE Button: Press once to play back the full message.
- PLAYL Button: Press and hold to play back audio.
- P-E Jumper (Pass-Through / Loop): Short jumper for continuous loop playback.
- FT Jumper: Short jumper to activate microphone feed-through directly to speaker.
- SP Output: Connector for $8\Omega$ speaker output.
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