SKU: SENS-2857
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SparkFun Sound Detector SEN-12642 Module - Analog/Digital/Audio Outputs, Breadboard Compatible

₹1,459.00 (Inclusive of all taxes)
Out of Stock

The SparkFun Sound Detector SEN-12642 is a versatile audio sensing module providing simultaneous analog envelope, digital gate, and raw audio outputs, compatible with 3.3V/5V microcontrollers like Arduino, Raspberry Pi, and ESP32 for sound amplitude and presence detection.

Features

  • Provides three simultaneous outputs: analog envelope, digital gate, and raw audio signal.
  • Wide operating voltage range from 3.5V to 5.5V DC with low 100µA quiescent current.
  • Features an adjustable amplifier with up to 40dB gain via a through-hole resistor.
  • Standard 0.1″ pin header spacing for direct breadboard and prototype board compatibility.
  • Compact board design for easy integration into audio monitoring and trigger projects.

Out of stock

Description

The SparkFun Sound Detector SEN-12642 is a compact, integrated audio sensing solution designed to simplify sound detection and analysis in electronic projects. It incorporates a microphone, pre-amplifier, and conditioning circuitry to deliver three independent signal outputs simultaneously: a raw audio signal, an analog envelope representing sound amplitude, and a digital gate output that toggles when sound exceeds a user-adjustable threshold. This multi-output architecture provides flexibility for applications ranging from simple sound-activated switches to more complex audio level monitoring.

Engineered for reliability, the module operates from a 3.5V to 5.5V DC supply, making it compatible with common 3.3V and 5V logic systems found in Arduino, Raspberry Pi, and other development platforms. The amplifier gain is configurable via a surface-mount resistor, allowing precise calibration of the digital gate’s sensitivity. Its breadboard-friendly form factor and standard pinout facilitate rapid prototyping and integration into a wide array of audio-responsive systems.

Key Features

  • Triple-output design provides raw audio, analog envelope, and digital gate signals for maximum application flexibility.
  • Configurable amplifier gain up to 40dB allows precise tuning of detection sensitivity and threshold.
  • Low-power operation with a typical quiescent current of 100µA, suitable for battery-powered devices.
  • Wide 3.5V to 5.5V input voltage range ensures compatibility with 3.3V and 5V microcontroller ecosystems.
  • Compact, breadboard-compatible PCB with standard 0.1" pin spacing for straightforward prototyping.
  • Robust signal conditioning circuitry provides stable analog and digital outputs for reliable sound detection.

Applications

  • Sound-activated triggers and switches for lighting, motors, or relays.
  • Audio level monitoring and VU meters for recording equipment or environmental noise tracking.
  • Clap or voice command detection interfaces for DIY smart home automation.
  • Acoustic event logging and data acquisition for security or wildlife monitoring systems.
  • Interactive art installations and exhibits requiring sound-based input and control.

Technical Specifications

Manufacturer Part NumberSEN-12642
Operating Voltage3.5 - 5.5 VDC
Operating Current100 µA (typical)
Output InterfacesAnalog Envelope, Digital Gate, Raw Audio
Amplifier GainUp to 40 dB
Gain AdjustmentVia through-hole resistor
Board DimensionsApprox. 9 x 6 cm
Pin Spacing0.1" (2.54 mm)

Frequently Asked Questions

What are the three output signals from the SparkFun Sound Detector?

The module provides three simultaneous and independent outputs: a raw audio signal directly from the microphone, an analog envelope output representing the sound amplitude (higher voltage for louder sounds), and a digital gate output that goes high when sound exceeds a user-adjustable threshold. You can use any combination of these outputs in your project.

How do I adjust the sensitivity or threshold of the digital output?

The digital gate output's threshold is set by the amplifier gain, which is adjustable up to 40dB. You can modify the gain by soldering a different resistor value in the designated through-hole location on the board. Refer to the SparkFun hookup guide for specific resistor values corresponding to desired sensitivity levels.

Is this module compatible with 3.3V microcontrollers like the ESP32?

Yes. The Sound Detector operates from 3.5V to 5.5V. When powered with a 3.3V supply, its analog envelope output will swing within the 0-3.3V range, and its digital output will be logic-high at 3.3V, making it fully compatible with 3.3V logic devices like the ESP32, Raspberry Pi Pico, and many ARM-based boards.

Can I use this sensor to measure precise decibel levels?

While the analog envelope output provides a voltage proportional to sound amplitude, it is not a calibrated sound pressure level (SPL) meter. It is excellent for relative sound level comparisons, triggering events at certain loudness thresholds, or creating audio level visualizers. For precise dB measurements, a dedicated SPL sensor with calibrated microphone and signal conditioning is required.

Package Includes

  • 1 x SparkFun Sound Detector Module (SEN-12642)

Additional Information

Weight 0.016 kg
Dimensions 6 × 9 × 1 cm