Microphone Sound Sensor (LM393)
by Generic
SKU: PSA-CMP-SOUND
No reviews yetTypical India street price
₹25–₹60
Clap / noise detector for interactive projects.
Interface: Analog + digital
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Concept
Electret mic → amp → comparator.
A little theory
Sound pressure becomes a tiny AC voltage; the op-amp boosts it. Digital OUT trips when amplitude > pot. In the classroom, treat Microphone Sound Sensor (LM393) as a beginner part using Analog + digital. Typical India street price is about ₹25–₹60. Always verify voltage and pin labels on your exact module — silk screens vary across clones. Start with a datasheet or trusted learn guide, power the part correctly, share GND with the MCU, and test with a simple blink/read sketch before building the full project. Measure voltages with a multimeter when something fails, and keep actuator current off the MCU regulator.
How it works in a project
Use DO for clap-on lamp; AO for VU-style analog.
Classroom & project use
- Clap switch
- Noise meter
- Voice-activated LED
Buying in India
Precautions
- Share a common GND with the microcontroller
- Verify polarity and voltage before powering the circuit
Specifications
| Mic | Electret |
| Output | AO + DO |
| Category | Sensors |
| Difficulty | Beginner |
| Voltage | 3.3–5V |
| Interface | Analog + digital |
Pinout
VCC | GND | AO (and DO if comparator module)
