Description
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.
Technical Specifications
| 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 |
Key Features & Indicators
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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).
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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.
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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.
Pin Configuration
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VCC: Power supply (connect to 3.3V or 5V).
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GND: Ground connection.
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DO (Digital Output): Connect to any digital input pin on your microcontroller to monitor for motion.
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