KY-037 Microphone Audio Sound Detection Sensor Module

The KY-037 Microphone sound detection module detects loud sounds like slamming doors, breaking glass, doorbells and alarms. The module has analog and digital outputs so the sensor can be ready by any microcontroller. The microphone can be oriented horizontally (perpendicular to the circuit board), or vertically (pointed 90 degrees from the circuit board) for optimal configuration. KY-037 Specifications: Power supply voltage: +5 VDC 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: 34mm x 15mm x 14mm (1.34 x 0.6 x 0.55 inches) L x W x H, excluding connector and microphone KY-037 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-level sounds such as voice conversations.