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This module is a high-sensitivity, non-directional sensor used to detect mechanical vibrations, shocks, or tilts. It is widely utilized in security alarms and smart devices due to its simple digital interface and adjustable sensitivity.
| Feature | Specification |
| Main Chipset | LM393 Low Voltage Comparator |
| Sensor Type | SW-420 (Normally Closed vibration switch) |
| Operating Voltage | 3.3V to 5V DC |
| Output Type | Digital (0 and 1) Logic levels |
| Current Consumption | >15mA driving ability |
| Dimensions | Approx. 32mm x 14mm (PCB only) |
| Sensitivity | Adjustable via onboard potentiometer |
| Mounting | Includes a 3mm fixed bolt hole for easy installation |
Onboard LEDs: It typically features two indicators: a Power LED (indicates the module is receiving electricity) and a Status/Digital Output LED (lights up when a vibration is detected).
Clean Signal: The use of the LM393 comparator ensures a clean waveform and strong output signal, making it easy to connect directly to an Arduino, Raspberry Pi, or ESP32.
Normally Closed (NC) Design: In its stable state, the circuit is closed (output is LOW). When vibration occurs, the internal spring momentarily disconnects, driving the output HIGH.
VCC: Power supply (connect to 3.3V or 5V).
GND: Ground connection.
DO (Digital Output): Connect to any digital input pin on your microcontroller to monitor for motion.
