ISD1820 Voice Recording and Playback Module – 10 Seconds
The ISD1820 Voice Recording Module is a compact audio recording and playback board designed for DIY electronics, robotics, and microcontroller projects.
Featuring the ISD1820 voice recording chip, the module allows users to record and play back short voice messages or sound effects without requiring external memory.
It includes an onboard microphone, recording and playback buttons, and a speaker connection, making it ideal for Arduino, ESP32, and interactive electronics applications.
Key Features
-
Main Chip: ISD1820
-
Recording Duration: Approximately 10 Seconds (Typical Module)
-
Operating Voltage: 3–5V DC
- Built-In Microphone
- Onboard Recording and Playback Buttons
- Non-Volatile Audio Storage
-
Playback Modes: Edge-Triggered and Level-Triggered
- Repeat Playback Support
- Microcontroller Control Interface
- Direct Speaker Output
- Supports 8Ω, 0.5W Small Speaker
- Compact PCB Design
Technical Specifications
| Parameter |
Specification |
| Model |
ISD1820 |
| Product Type |
Voice Recording and Playback Module |
| Main IC |
ISD1820 |
| Operating Voltage |
3–5V DC |
| Recording Duration |
Approximately 10 Seconds |
| Audio Input |
Onboard Microphone |
| Audio Output |
Speaker Connection |
| Recommended Speaker |
8Ω, 0.5W |
| Recording Control |
REC Button / Control Pin |
| Playback Control |
PLAYE / PLAYL |
| Repeat Playback |
Supported |
| Memory Type |
Non-Volatile |
| Approximate Dimensions |
38 × 42.5mm |
Control Functions
| Control |
Function |
| REC |
Records audio while activated |
| PLAYE |
Plays the recorded message once |
| PLAYL |
Plays audio while the input remains active |
| FT |
Feed-through mode for microphone audio |
| SP+ / SP- |
Speaker Connections |
| VCC |
Power Supply |
| GND |
Ground |
Applications
- Arduino Voice Projects
- ESP32 Audio Projects
- Talking Robots
- Voice Reminder Systems
- Interactive Toys
- Sound Effects and Alarms
- DIY Electronics
- Educational Projects
Arduino and ESP32 Compatibility
The module can operate independently using its onboard buttons or be controlled through compatible microcontroller GPIO pins.
-
Arduino UNO / Mega / Nano: Supports digital control of recording and playback.
-
ESP32 / ESP8266: Can control the module using suitable 3.3V logic-level connections.
-
Raspberry Pi: Can control playback and recording using compatible GPIO interfacing.
Important Notes
- The typical recording duration is approximately 10 seconds and may vary depending on the module's oscillator configuration.
- Recorded audio is retained when power is disconnected.
- The module is intended for short voice messages and sound effects, not high-quality audio recording.
- Connect a suitable small speaker to the speaker output terminals.
- The module does not require an SD card or external memory.
- A speaker may need to be purchased separately.
Package Includes
1 × ISD1820 Voice Recording and Playback Module
