The **FD-R60** is a common model number associated with **Industrial Microwave Sensor Modules** (often Doppler Radar sensors) used for motion detection, automatic doors, and security systems. Below is a breakdown of the electronic components and functional specifications for this type of module. --- ### 1. Key Component Specifications The FD-R60 typically operates on the **X-Band** frequency. Its internal circuitry is designed to emit a low-power microwave signal and detect the frequency shift (Doppler Effect) caused by moving objects. | Component / Parameter | Specification (Typical) | | :--- | :--- | | **Frequency** | 10.525 GHz | | **Operating Voltage** | 5V DC ± 0.25V | | **Current Consumption** | 30mA - 40mA | | **Detection Range** | 2 to 16 meters (Adjustable) | | **Signal Output** | Analog Level / TTL Pulse | | **Antenna Type** | Integrated Microstrip Patch Antenna | --- ### 2. Functional Blocks The internal electronic architecture of the FD-R60 consists of four primary stages: #### A. The Oscillator (Transmitter) * **DRO (Dielectric Resonator Oscillator):** This generates the stable 10.525 GHz high-frequency carrier wave. * **Microstrip Antenna:** A flat, etched copper pattern on the PCB that radiates the microwave energy into the environment. #### B. The Mixer (Receiver) * When the transmitted wave hits a moving object, it reflects back at a slightly different frequency. * The **Mixer diode** combines the transmitted and received signals to extract the "Difference Frequency" (Doppler frequency), which is usually in the low Hz to kHz range. #### C. Amplification & Filtering * The raw signal from the mixer is extremely weak. * **Operational Amplifiers (Op-Amps):** Usually a dual op-amp (like the LM358) is used to amplify the signal and filter out high-frequency noise or 50/60Hz interference from power lines. #### D. Signal Processing / Output * The circuit converts the analog wave into a digital high/low signal or a measurable analog voltage that a microcontroller (like Arduino or PLC) can interpret. --- ### 3. Pinout Diagram (Standard) Most FD-R60 modules utilize a 3-pin or 4-pin header for integration: ```markdown 1. VCC -> +5V Power Supply 2. GND -> Ground 3. OUT -> Signal Output (Active High when motion is detected) 4. IF -> Intermediate Frequency (Raw analog output - optional) ``` --- ### 4. Implementation Example To use the FD-R60 with a microcontroller, you generally treat it as a digital input. ```cpp // Basic Arduino Logic for FD-R60 int sensorPin = 2; // Connected to OUT int ledPin = 13; void setup() { pinMode(sensorPin, INPUT); pinMode(ledPin, OUTPUT); } void loop() { int motion = digitalRead(sensorPin); if (motion == HIGH) { digitalWrite(ledPin, HIGH); // Motion detected } else { digitalWrite(ledPin, LOW); } } ``` ---