Based on the power amplifier LM386 and a electret microphone, it can be used to detect whether there is any sound that beyond a set threshold. The threshold can be adjusted by the onboard potentiometer.
Adjust the on-board potentiometer to adjust the sensitivity. The module output HIHG/LOW when the voice is Lower/higher than the threshold set by the potentiometer.
Please note that this sensor can only outputs if there is sound that beyond the threshold, but not the loudness and frequency.
- On-board LED indicator
- Threshold adjustable
- Working voltage: 3.3V-5V