ISD1820 is a small Voice Recorder and Playback module that can do the multi-segment recording. The user can achieve a high quality of recording (for 8 to 20secs) for each application with the adjustment of the on-board resistor. This Voice Recorder/Playback module is designed with embedded-Flash memory, which can hold data for up to 100 years and erase/record the life cycle up to 100,000.
Pin Description of ISD1820 Recorder/Playback Module
| Pin Name | Description |
| VCC | DC 2.4-5.5V |
| GND | Ground |
| FT | FeedThrough: This mode enables the Microphone to drive the speaker directly. |
| REC/REC (Button) | The REC input is an active‐HIGH record signal. The module starts recording whenever REC is HIGH. This pin must remain HIGH for the duration of the recording. REC takes precedence over either playback (PLAYL or PLAYE) signal. |
| P-E/PLAY-E (Button) | Playback, Edge‐activated: When a HIGH‐going transition is detected continues until an End‐of‐Message (EOM) marker is encountered or the end of the memory space is reached. |
| P-L/PLAY-L (Button) | Playback, Level‐activated, when this input pin level transits for LOW to HIGH, a playback cycle is initiated. |
| SPI | The SP+ and SP‐ pins provide a direct drive for loudspeakers with impedances as low as 8Ω. Note: This is not Serial Parallel Interface Pins. |
| MIC | Microphone In: the microphone input transfers its signals to the on‐chip pre-amplifier. |
Specifications:
- the main chip: ISD1820
- Module Board size: 38mm x 42.5mm
- The working voltage: DC 3 ~ 5V
- Loudspeaker: 8 Ohm, 0.5W.
Features:
- An easy to use 10 seconds of voice recording
- High-quality, natural voice restored
- Can be used as propaganda module
- with looping, jog playback, single-pass play function
- Available single-chip control
- This module can directly drive a small speaker 8 ohm 0.5W
- Power supply :3-5V, which can be accessed pin power;
- Audio recording control mode: the key to control or microcontroller, IO has drawn the line of control
Interfacing Diagram
The ISD1820 based voice recorder and playback module can easily be controlled using any microcontroller like PIC, Arduino, etc. via three digital I/O communication pins.
Applications
- Voice Recorder
- Microcontroller based audio playback
- Sound recorder
Package Includes :-
- 1 x ISD1820 Recording Module Voice Board With On Board Mic
- 1 x Speaker
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