KY-038 Microphone Sound Sensor Module
The KY-038 Microphone Sound Sensor Module is a microphone-based sound detection module that uses an electret condenser microphone and an LM393 comparator to de…
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Product Description
Overview
The KY-038 is one of the most common sound sensor modules used in electronics projects. It detects sound using an electret condenser microphone and compares the signal against an adjustable threshold using the onboard LM393 comparator. The module provides a real-time analog output and a digital output that switches when the sound level exceeds the preset threshold.
It is commonly used for clap switches, sound-triggered automation, security alarms, and educational electronics projects.
Specifications
Module Name: KY-038 Microphone Sound Sensor Module
Sensor Type: Electret Condenser Microphone
Comparator IC: LM393 Dual Voltage Comparator
Operating Voltage: 3.3 V to 5 V DC
Working Current: 4–5 mA
Frequency Response: 50 Hz to 20 kHz
Microphone Sensitivity: -44 dB ±2 dB
Output Type: Analog Output (AO), Digital Output (DO)
Digital Output Level: LOW when sound exceeds threshold, HIGH under normal conditions
Sensitivity Adjustment: Onboard Potentiometer
Interface: VCC, GND, AO, DO
Maximum Detection Distance: Up to 0.5 m (Depends on sound intensity)
Operating Temperature: -20°C to +70°C
Module Dimensions: 35 × 15 × 13 mm
Weight: 3–5 g
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