Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Operating Voltage | 3.3V - 5V DC |
| Output Signal | Digital Switching Output (0 and 1) |
| Sensitivity | Adjustable via Potentiometer |
| Microphone Type | Electret Condenser Microphone |
| PCB Color | Blue |
| Dimensions | 32mm x 16mm x 8mm |
| Interface | 3-Pin Header (VCC, GND, DO) |
| Compatible Platforms | Arduino, Raspberry Pi, ESP32 |
| Response Time | < 10ms |
| Application | Voice Control, Clap Switch, Noise Detection |
Anonymous
Mar 28, 2026
Rating: 3/5
Works well but sensitive to voltage spikes
The detection works fine, but I noticed some false triggers when my motor driver activated nearby. Adding a capacitor helped stabilize it. Good for simple projects, maybe not industrial use.
Anonymous
Mar 15, 2026
Rating: 5/5
Great for learning embedded systems
Bought this for a university project on voice-activated lights. It was easy to code for and the documentation online is plentiful. Highly recommend for beginners.
Anonymous
Mar 06, 2026
Rating: 4/5
Compact and effective
Small form factor fits easily into tight enclosures. The microphone picks up sounds clearly. Only wish it had an analog output option as well, but for digital switching, it's perfect.
Anonymous
Mar 06, 2026
Rating: 4/5
Good value but needs calibration
Great little sensor for the price. You definitely need to spend time adjusting the potentiometer to get the threshold right for your specific environment. Once set, it's reliable.
Anonymous
Mar 03, 2026
Rating: 5/5
Perfect for my Arduino clap switch project
This module works exactly as described. The sensitivity adjustment is very responsive, allowing me to tune it specifically for hand claps without triggering on background noise. Easy to wire up.
Anonymous
Mar 02, 2026
Rating: 5/5
Reliable digital output
I've used these in several student robotics kits. The digital output is clean and interfaces perfectly with microcontrollers. The blue PCB is sturdy and the soldering points are clear.
Q: Is there a delay between the sound occurrence and the output signal?
A: The response time is extremely fast, typically under 10 milliseconds. Any perceived delay is usually due to the code processing time on your microcontroller, not the sensor itself.
Q: Does this module provide an analog output or only digital?
A: This specific blue board model provides a digital switching output (DO). It outputs a high or low signal based on whether the sound intensity exceeds the threshold set by the potentiometer.
Q: Can this detect specific frequencies like a whistle?
A: The module detects sound intensity (amplitude) rather than specific frequencies. However, by adjusting the sensitivity potentiometer, you can tune it to react primarily to sharp, loud sounds like a whistle while ignoring lower ambient noise.
Q: How do I adjust the sensitivity?
A: There is a small blue potentiometer on the board. Use a small Phillips screwdriver to turn it clockwise to increase sensitivity (detect quieter sounds) or counter-clockwise to decrease it.
Q: What is the maximum voltage this can handle without damage?
A: The recommended operating voltage is between 3.3V and 5V DC. Applying voltage higher than 5V may damage the onboard comparator and microphone circuitry.
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