The **KWVS2-2BC-R** is a specific electronic component, typically categorized as a **Vibration Sensor Switch** (often referred to as a "Spring Type" or "Rolling Ball" vibration switch). These components are widely used in low-power electronics to detect motion, tilt, or physical shock. --- ### 1. Technical Specifications The following table outlines the general technical characteristics of this type of component: | Parameter | Typical Value | | :--- | :--- | | **Switch Type** | Vibration / Shock / Tilt | | **Max Voltage** | 12V DC | | **Max Current** | < 20mA | | **Contact Resistance** | < 10 $\Omega$ | | **Insulation Resistance** | > 10M $\Omega$ | | **Operating Temperature** | -40°C to +80°C | | **Lifespan** | Up to 100,000 cycles | --- ### 2. Physical Construction & Internal Mechanism The "2BC-R" designation usually refers to the physical form factor and the sensitivity rating. * **Internal Spring/Ball:** Inside the housing is a thin spring or a conductive ball. When the device is at rest, the circuit is either "Open" or "Closed" depending on the orientation. * **Trigger Mechanism:** Upon sensing a vibration or movement, the internal element moves and touches a center post or the outer casing, momentarily completing (or breaking) the electrical circuit. * **Housing:** Usually encased in a heat-shrink tube or a plastic shell to prevent environmental interference. --- ### 3. Application Circuits These sensors are often used as "Wake-up" switches for microcontrollers (like Arduino or ESP32) to save battery life. #### Example Connection Diagram ```cpp // Basic Arduino Logic for Vibration Detection int sensorPin = 2; // Connected to KWVS2-2BC-R int ledPin = 13; void setup() { pinMode(sensorPin, INPUT_PULLUP); // Use internal pull-up resistor pinMode(ledPin, OUTPUT); } void loop() { int measurement = digitalRead(sensorPin); if (measurement == LOW) { digitalWrite(ledPin, HIGH); // Vibration detected } else { digitalWrite(ledPin, LOW); } } ``` --- ### 4. Common Use Cases * **Anti-theft Alarms:** Detecting when a device is moved or picked up. * **Power Management:** Turning on a device (like a bicycle light or a remote control) only when it is in motion. * **Toys:** Triggering sound or light effects when the toy is shaken. * **Smart Devices:** Activating displays on wearable tech when the arm is lifted. ---