Opencircuit KY-037 Microphone sound detection module

The KY-037 Microphone sound detection module detects loud sounds like slamming doors. The module has an analog and digital output so the sensor can be ready by any microcontroller.

Specifications: Power supply voltage: +5V Power On LED light: LED1 Electret Condenser Microphone (ECM) sensor AO = analog output provides a real-time output voltage signal of the microphone DO = Digital output, output goes high when the intensity of the sound reaches threshold Comparator Circuit: LM393 Comparator Output LED: LED2, on when sound reaches threshold Built in potentiometer can be used to adjust the DO threshold level Mounting screw hole size: 3mm Circuit Board Dimensions: 35mm x 15mm x 14mm (L x W x H, excluding connector and microphone)

Operation: Pin + to +5VDC Pin - to Ground Pin AO to Microcontroller Analog Input (for analog program) Pin DO to Microcontroller Digital Input (for digital program) LED1 will illuminate when power is applied Turn potentiometer counter-clockwise until LED2 turns off. This is the sound threshold. Then adjust to the appropriate threshold for your application.

NOTE: The electret microphone in this module is not extremely sensitive. It is designed to detect loud noises (slamming doors, glass breaking, dogs barking, doorbells, alarms, buzzers, etc.). It is not appropriate for detecting low levels sounds such as voice conversations.