The **KWVS2-2CB-R** is a specific electronic component typically categorized as a **Vibration Sensor** or **Tilt Switch**. It is designed to detect mechanical motion, vibration, or changes in orientation using a non-mercury based mechanism. --- ### 1. Technical Specifications Below are the general characteristics typically associated with this series of sensors: | Feature | Specification | | :--- | :--- | | **Type** | Rolling Ball / Spring Vibration Sensor | | **Contact Type** | Normally Open (NO) or Momentary Close | | **Operating Voltage** | Typically < 12V DC | | **Current Rating** | < 20mA | | **Life Expectancy** | > 100,000 cycles | | **Housing Material** | Plastic (PBT/ABS) or Metal | | **Lead Finish** | Tin Plated / Gold Plated | --- ### 2. Internal Mechanism and Working Principle The "KWVS" series usually operates using a **rolling ball mechanism**: 1. **State of Rest:** Inside the housing, a small conductive ball rests away from the contact pins (Circuit Open). 2. **State of Motion:** When the device is shaken or tilted, the ball moves and briefly touches the two internal terminals. 3. **Electrical Output:** This contact completes the circuit for a fraction of a second, creating a pulse or "trigger" signal. --- ### 3. Key Electronic Characteristics * **Non-Mercury:** Unlike older tilt switches, this model uses a solid metal ball, making it environmentally friendly and compliant with RoHS standards. * **Omni-directional Sensitivity:** It is designed to trigger regardless of the direction of the vibration, provided the force is strong enough to move the internal mass. * **Contact Resistance:** When triggered, the resistance drops significantly, but due to "bounce," it is best used with a debouncing circuit or an interrupt pin on a microcontroller. --- ### 4. Typical Applications * **Anti-theft Alarms:** Detecting when a device or vehicle is moved. * **Power Saving:** Waking up a remote control or toy when it is picked up. * **Orientation Sensing:** Simple tilt detection for consumer electronics. * **Impact Detection:** Logging if a package or product has been dropped. --- ### 5. Implementation Example When connecting this to a microcontroller (like an Arduino), use a pull-up resistor to ensure a stable logic state. ```cpp // Basic Arduino code to detect trigger const int sensorPin = 2; // Connected to KWVS2-2CB-R void setup() { pinMode(sensorPin, INPUT_PULLUP); // Use internal pull-up Serial.begin(9600); } void loop() { int sensorVal = digitalRead(sensorPin); if (sensorVal == LOW) { Serial.println("Vibration Detected!"); delay(200); // Simple debounce } } ```