Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Operating Voltage	3.3V - 5V DC
Output Signal	Digital Switching Output (0 and 1)
Sensor Type	SW-420 Vibration Switch
Comparator Chip	LM393
Sensitivity Adjustment	Blue Potentiometer
Board Size	3.2cm x 1.5cm
Mounting Hole Diameter	3.0mm
Indicator LED	Power and Trigger Status LEDs
Compatible Platforms	Arduino, Raspberry Pi, STM32
Application Scope	Anti-theft alarms, toy cars, robotics

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Perfect for my Arduino alarm project

This module works exactly as described. The sensitivity is easily adjustable with the potentiometer, and it triggers reliably when tapped. Great value for the price.

Anonymous

Mar 17, 2026

Rating: 5/5

Great for learning electronics

Bought this for a university project on security systems. It interfaces perfectly with the microcontroller and the LEDs help visualize the state clearly.

Anonymous

Mar 16, 2026

Rating: 4/5

Reliable batch purchase

Ordered ten units for our workshop. Nine worked flawlessly out of the box; one had a slightly loose pin but was easy to solder back in place.

Anonymous

Mar 14, 2026

Rating: 4/5

Good sensor, clear instructions needed

The hardware quality is solid and the LM393 chip provides a clean signal. I wish the listing included a basic wiring diagram, but a quick search online solved that.

Anonymous

Mar 08, 2026

Rating: 5/5

Responsive and compact

Very small footprint which helped in my tight enclosure design. It detects vibrations instantly and the output goes low immediately upon detection.

Anonymous

Mar 01, 2026

Rating: 5/5

Exceeded expectations

I was worried about false positives, but adjusting the potentiometer fixed that entirely. Now it only triggers on significant shocks. Highly recommended.

5 FAQ

Q: How do I adjust the sensitivity?

A: Use the blue potentiometer on the board. Turn it clockwise to decrease sensitivity or counter-clockwise to increase it while testing with gentle taps.

Q: Does this module output analog or digital signals?

A: This module outputs a digital signal (HIGH or LOW). When vibration is detected, the DO pin switches states.

Q: Is there a delay between vibration and signal output?

A: The response time is nearly instantaneous, typically within milliseconds, depending on the strength of the vibration and sensitivity setting.

Q: What is the maximum current this module can handle?

A: The module itself consumes very little current (approx. 3mA). The output pin should not source more than 20mA to avoid damaging the comparator chip.

Q: Can I connect this directly to a 5V Raspberry Pi GPIO?

A: Yes, the module operates on 3.3V to 5V, making it compatible with Raspberry Pi GPIO pins without needing a level shifter.

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