KY-037 Voice Sound Detection Sensor

Specifications

• Name: KY-037 Voice Sound Detection Sensor
• Module Type: Sound Detection
• Use Case: Sound intensity monitoring and sound-triggered actions
• Output Type: Analog and Digital

2. Electrical Specifications

• Operating Voltage: 3.3V – 5V
• Output:
  • Analog Output (AO): Varies with sound intensity, and is useful for measuring sound amplitude.
  • Digital Output (DO): High (logic level 1) when the sound level exceeds the threshold; otherwise Low (logic level 0).
• Current Consumption: Approx. 4-5 mA

3. Physical Dimensions

• PCB Dimensions: Approx. 38mm x 15mm x 13mm (L x W x H)
• Weight: Approx. 5g
• Pin Header: 3-Pin (DO, AO, GND, VCC)

4. Components and Features

• Microphone: High-sensitivity condenser microphone.
• Adjustable Potentiometer: Adjusts the sound sensitivity level threshold for the digital output.
• LM393 Comparator: Integrated to process sound intensity and determine digital signal output.
• Indicator LEDs:
  • Power LED: Shows module power status.
  • Signal LED: Lights up when the sound threshold is reached (Digital Output High).
• Anti-Interference Design: Designed to reduce false triggers from ambient noise.

5. Performance Specifications

• Sensitivity Range: Typically effective for detecting claps, knocks, or other sharp sounds within a few meters.
• Frequency Response: Optimized for sounds within the human audible range (approx. 20Hz – 20kHz).
• Output Response Time: Fast response to sudden changes in sound intensity; ideal for real-time applications.

6. Applications

• Sound-triggered projects, such as clap switches for lights, alarms, and sound-activated toys.
• Environmental noise monitoring.
• Voice detection systems for speech-activated processes.

7. Wiring and Connections

• Pinout:
  • VCC: Connects to a 3.3V or 5V power source.
  • GND: Ground connection.
  • AO (Analog Output): Outputs an analog voltage corresponding to the sound intensity.
  • DO (Digital Output): Outputs a digital HIGH when the sound level exceeds the set threshold.