SW-420 Digital Vibration Sensor Module with LM393
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Description
The SW-420 digital vibration sensor module detects environmental shock and vibrations using a normally closed switch and an onboard LM393 comparator. When idle, the circuit remains closed with a low output and green indicator active, driving high when motion or impact momentarily breaks the contact. It is ideal for students, hobbyists, and makers building interactive security alarms and robotics projects.
Reliable vibration detection
Featuring a normally closed SW-420 switch, the module outputs a low digital signal while stationary with its green signal LED illuminated. Any vibration momentarily breaks the circuit, driving the output high and turning the LED off to alert the connected controller.
Clean comparator output
An integrated wide-voltage LM393 comparator delivers a clean digital waveform with strong driving capability exceeding 15mA. It operates across a 3.3V to 5V supply range for direct interfacing with microcontrollers.
Compact design and installation
The compact 3.2 x 1.4cm board features pre-drilled mounting holes for easy installation onto chassis or enclosures. Take care when wiring, as reversing the power input direction can damage the onboard chip.
Typical applications
This sensor is well-suited for smart cars, earthquake detection devices, motorcycle alarms, and general theft alarm systems.
Package contents
Includes 1 x Vibration Sensor Module.
Specifications
| Device | Sensor Module |
| Type | Digital | Vibration |
| Sensor Type | SW-420 normally closed type vibration sensor |
| Comparator | Wide Voltage LM393 Comparator |
| Working Voltage | 3.3V ~ 5V |
| Output Format | Digital Switching Output (0 and 1) |
| Driving Ability | >15mA |
| PCB Size | 3.2 x 1.4cm |
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