KY-038 (Red) XD-74 (Blue) Sound Detection Microphone Sensor Module XD74 KY038 LM393 For Arduino Voice Noise Detection

Specification: A(Red)

- Signal output indication.
- Single channel signal output.
- Circuit board output switch quantity.
- The output effective signal is low level.
- Can detect the intensity of the sound environment.
- With the retaining bolt hole, convenient installation.
- When there is sound, outputs low level and the signal light.Can be used for Acoustic control light, give sound and light alarm working with Photosensitive sensor ,and sound control,sound detection
- Working voltage:DC 3.3-5V
- Main chip: LM393, Electret condenser microphone
- Package Included: 1 x Sound Detection Sensor Module

Note: This sensor only recognizes the availability of sound (vibration principle) can not identify the size of the sound or the specific frequencies of sound.

Tutorial & Code:

- [Tuto](https://goo.gl/F1VqR6)[rial](https://goo.gl/F1VqR6)
- [Code](https://goo.gl/WUuxrn)

Difination: B (Blue)

Sound detection module suitable for detecting sound through the microphone and indicating when it exceeds the trigger point. The module is suitable for use with Arduino, Raspberry Pi and other microcontrollers. The sound trigger point is adjustable using the potentiometer, when the trigger point is exceeded the LED illuminates and the output is sent LOW.

- 3.3V - 5V input voltage
- Dimensions: 45 x 17mm