The **JQ400-R** is typically a core component used in **infrared (PIR) motion sensor** modules and remote-control systems. It is an integrated circuit (IC) or a specific module assembly designed for signal processing and power management in automatic lighting or security systems. --- ### 1. Technical Specifications Overview The JQ400-R is optimized for low power consumption and high sensitivity. Below are the typical electrical characteristics found in this series: | Parameter | Specification (Typical) | | :--- | :--- | | **Operating Voltage** | DC 12V - 24V (standard) | | **Static Current** | < 50µA | | **Output Type** | Relay Output or High/Low Logic Level | | **Delay Time** | Adjustable (typically 5s to 10 mins) | | **Detection Range** | 3 to 8 Meters | | **Operating Temp** | -20°C to +50°C | --- ### 2. Core Electronic Components The JQ400-R architecture usually consists of four main electronic sections: #### A. The PIR Sensor (Pyroelectric Input) * **Function:** Detects infrared radiation emitted by human bodies. * **Component:** Usually a dual-element sensor paired with a Fresnel lens to focus the IR energy onto the sensor surface. #### B. Signal Processing IC * **Function:** This is the "brain" of the JQ400-R. It filters the noise from the sensor and determines if a "trigger" event has occurred. * **Features:** Includes built-in operational amplifiers and a window comparator to prevent false alarms caused by temperature fluctuations. #### C. Control Potentiometers * **Sensitivity (SENS):** A variable resistor used to adjust the detection distance. * **Time (TIME):** A variable resistor used to adjust how long the load remains "ON" after motion stops. #### D. Switching Element (Output Stage) * **Relay:** In many JQ400-R models, a mechanical relay is used to allow the control of high-wattage AC loads (like LED lamps or sirens). * **Transistor/MOSFET:** Used in low-voltage DC versions for faster switching and silent operation. --- ### 3. Connection Pinout When integrating the JQ400-R into a circuit, the wiring typically follows this standard logic: ```cpp // General Logic for JQ400-R Wiring VCC -> [Positive Power Supply] GND -> [Common Ground] OUT -> [To Load or Microcontroller Input] ``` --- ### 4. Common Applications 1. **Automatic Lighting:** Turning on hall or garage lights upon movement. 2. **Security Systems:** Triggering an alarm when an intruder enters a zone. 3. **Industrial Automation:** Activating conveyors or displays when a person approaches.