The ISD1820 is a Voice Recorder Module that provides outstanding quality, natural audio from the recorded audio by a Microphone driven through Microcontroller. The module has dual operation modes; Standalone and Microcontroller are driven, therefore, we one easily use this as per demand.
Hardware Overview
- REC Button: The REC input is an active high-record signal. We should press this button while recording.
- Play-E Button: Playback, Edge activated. When a high transition is detected continues until it reached the end of the memory space.
- Play-L Button: Playback, Level activated button. When this gt pressed, it starts a playback cycle
- Microphone In: To get the voice signal, the microphone input transfers its signals to the chip pre-amplifier present on the board.
Features and Specifications of ISD1820
Features
- Push‐button interface, playback can be edge or level activated
- Automatic power‐down mode
- On‐chip 8Ω speaker driver
- Signal 3V Power Supply
- Can be controlled both manually or by MCU
- Sample rate and duration are changeable by replacing a single resistor
- Record up to 20 seconds of audio
- .High-quality, natural voice restored.
- Can be used as a propaganda module.
- With looping, jog playback, and single-pass play function.
- Available single-chip control.
Specifications
- Dimensions: 43 x 34 x 11 (LxWxH) mm.
- The working voltage: is DC 3V-5V.
- Loudspeaker: 8 Ohm, 0.5W.
- An easy to use 10 seconds voice recording.
Pinouts of ISD1820
| Pin Name | Description |
| VCC | DC 2.4-5.5V |
| GND | Ground |
| FT | FeedThrough: This mode enables the Microphone to drive the speaker directly. |
| REC | The REC input is an active HIGH record signal. The module records whenever REC is HIGH. This pin must remain HIGH for the duration of the recording. |
| P-E | 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 | Playback, Level‐activated, when this input pin level transits from LOW to HIGH, a playback cycle is initiated. |
| SP+ | provide a direct drive for loudspeakers with impedances as low as 8ohms, Not Serial Parallel Interface Pins. |
| SP- | provide a direct drive for loudspeakers with impedances as low as 8ohms, Not Serial Parallel Interface Pins |
Applications
Recording Devices
Since this module works to record audio, therefore, can be used in various portable recording devices to serve that purpose.
