Features:
- Record and playback up to 10 seconds of audio, extendable to 20 seconds.
- Control via pushbutton or MCU.
- Edge or level-activated playback.
- Built-in microphone for recording.
- On-chip 8-ohm speaker driver.
- Auto power-down mode for energy efficiency.
- Operating voltage: 2.6 - 5V.
Specifications:
- Main chip: ISD1820
- Size: 38 mm × 42.5 mm
Control Features:
- REC (RECORD): Activated when the pin is HIGH for recording. Release to stop.
- PLAYE (PLAY Edge): Playback activated on HIGH transition, stops at End-Of-Message (EOM).
- PLAYL (PLAY Level): Playback active when the pin is HIGH until set to LOW or EOM is reached.
- PTREPEAT (REPEAT Jumper): Enables continuous playback.
- FT (FT Jumper): Enables Feed-Thru mode to send audio from the microphone to the speaker.
- LED Output: Goes LOW when LED is lit.
- VCC: Operates between 2.6 to 5.5V.
- GND: Should be connected to the uC ground.
- NC (No Connect): Unused pin.
Resistor-Controlled Oscillator (ROSC):
ROSC input determines recording duration, sample rate, and bandwidth. The duration can be adjusted by changing the resistor value per the table below.
| ROSC |
Duration |
Sample Rate |
Bandwidth |
| 80K Ohm |
8 Secs |
8.0kHz |
3.4kHz |
| 100K Ohm |
10 Secs |
6.4kHz |
2.6kHz |
| 120K Ohm |
12 Secs |
5.3kHz |
2.3kHz |
| 160K Ohm |
16 Secs |
4.0kHz |
1.7kHz |
| 200K Ohm |
20 Secs |
3.2kHz |
1.3kHz |
Audio Output:
- The module can drive an 8-ohm speaker.
- It can be used to drive an audio amplifier for louder sound if needed.
Features:
- Record and playback up to 10 seconds of audio, extendable to 20 seconds.
- Control via pushbutton or MCU.
- Edge or level-activated playback.
- Built-in microphone for recording.
- On-chip 8-ohm speaker driver.
- Auto power-down mode for energy efficiency.
- Operating voltage: 2.6 - 5V.
Specifications:
- Main chip: ISD1820
- Size: 38 mm × 42.5 mm
Control Features:
- REC (RECORD): Activated when the pin is HIGH for recording. Release to stop.
- PLAYE (PLAY Edge): Playback activated on HIGH transition, stops at End-Of-Message (EOM).
- PLAYL (PLAY Level): Playback active when the pin is HIGH until set to LOW or EOM is reached.
- PTREPEAT (REPEAT Jumper): Enables continuous playback.
- FT (FT Jumper): Enables Feed-Thru mode to send audio from the microphone to the speaker.
- LED Output: Goes LOW when LED is lit.
- VCC: Operates between 2.6 to 5.5V.
- GND: Should be connected to the uC ground.
- NC (No Connect): Unused pin.
Resistor-Controlled Oscillator (ROSC):
ROSC input determines recording duration, sample rate, and bandwidth. The duration can be adjusted by changing the resistor value per the table below.
| ROSC |
Duration |
Sample Rate |
Bandwidth |
| 80K Ohm |
8 Secs |
8.0kHz |
3.4kHz |
| 100K Ohm |
10 Secs |
6.4kHz |
2.6kHz |
| 120K Ohm |
12 Secs |
5.3kHz |
2.3kHz |
| 160K Ohm |
16 Secs |
4.0kHz |
1.7kHz |
| 200K Ohm |
20 Secs |
3.2kHz |
1.3kHz |
Audio Output:
- The module can drive an 8-ohm speaker.
- It can be used to drive an audio amplifier for louder sound if needed.
