The **LS-R976-NR-1** is a specific part number primarily associated with **Infrared (IR) Receivers** or **Photo-reflectors** used in industrial automation, counting devices, and obstacle detection. It is often manufactured by companies specializing in optoelectronics (such as Lite-On or specialized Chinese electronics manufacturers). --- ### 1. Key Technical Specifications Based on the standard parameters for this series of IR components, here are the typical electronic characteristics: | Parameter | Typical Value | Description | | :--- | :--- | :--- | | **Component Type** | Phototransistor / IR Receiver | Detects 940nm IR light. | | **Peak Wavelength** | 940 nm | Matches standard IR emitters. | | **Max Voltage (Vceo)** | 30V | Maximum collector-emitter voltage. | | **Collector Current** | 20mA - 50mA | Current flow when light is detected. | | **Mounting Type** | SMD (Surface Mount) | Low profile for PCB integration. | | **Operating Temp** | -25°C to +85°C | Standard industrial range. | --- ### 2. Physical Layout and Pinout The "R976" series usually follows a standard sub-miniature footprint. * **Emitter (E):** The terminal through which current exits. * **Collector (C):** The terminal where positive voltage is applied (in an NPN configuration). * **Lens:** Usually clear or dark-tinted plastic that filters out visible light to prevent interference. --- ### 3. Circuit Integration To use the LS-R976-NR-1, it must be paired with an Infrared LED (the transmitter). #### Typical Wiring Diagram (NPN Phototransistor) ```text VCC (+5V) | [Resistor 10kΩ] | +---- Output (Signal to MCU) | [Collector] LS-R976 [Emitter] | GND ``` * **When IR light hits the sensor:** The transistor conducts, pulling the Output signal to **LOW**. * **When IR light is blocked:** The transistor turns off, and the pull-up resistor pulls the Output signal to **HIGH**. --- ### 4. Common Applications 1. **Optical Encoders:** Measuring motor speed by counting pulses through a slotted wheel. 2. **Paper Sensors:** Detecting the presence of paper in printers or scanners. 3. **Proximity Sensing:** Detecting when an object is close to a device. 4. **End-of-Travel Switches:** Used in 3D printers and CNC machines to stop axis movement. ---