LM393 Sound Sensor Module | Adjustable Sensitivity Mic
LM393 Sound Sensor Module with Adjustable Threshold
The LM393 Sound Sensor Module is a high-sensitivity sound detection board that converts audio signals into digital and analog outputs. It uses an electret microphone and LM393 comparator to trigger a signal when sound exceeds a preset threshold, adjustable via onboard potentiometer. Ideal for clap switches, voice-activated projects, and noise monitoring.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage | 3.3V – 5V DC |
| Output Type | Digital (DO) and Analog (AO) |
| Microphone | Electret condenser |
| Comparator IC | LM393 |
| Sensitivity | Adjustable via potentiometer |
| Dimensions | 32 mm × 17 mm |
What You Can Build With This
- Clap switch to toggle lights or appliances
- Sound-activated LED strip animations
- Voice or sound triggered camera shutter
- Noise level monitor with analog output to microcontroller ADC
Compatibility
This module works with any 3.3V or 5V microcontroller, including Arduino Uno, Nano, Mega, ESP8266, ESP32, and Raspberry Pi. The digital output connects directly to a GPIO pin, while the analog output can be read via ADC for varying sound levels.
Wiring Notes
Connect VCC to 5V (or 3.3V), GND to GND, DO to a digital input pin for threshold-based detection, or AO to an analog input for sound intensity reading. Ensure the potentiometer is adjusted until the DO LED triggers at the desired sound level.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
Yes, the LM393 sound sensor module works directly with Arduino Uno at 5V. Connect DO to digital pin 2 and use digitalRead() to detect sound events.
Can I detect sound intensity with this module?
Yes, the analog output (AO) provides a voltage proportional to the sound level. Connect to an analog pin and use analogRead() to measure relative loudness.
How do I adjust the sensitivity?
Turn the onboard potentiometer clockwise to increase sensitivity (triggers at quieter sounds) and counterclockwise to decrease sensitivity. The DO LED lights up when sound is detected.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items