The **TOAD347-RXC** is a specialized electronic module, typically functioning as a high-frequency **Superheterodyne Wireless Receiver**. It is commonly used in remote control systems, security alarms, and IoT data transmission. --- ### 1. Technical Specifications The following table summarizes the key electronic characteristics of the module: | Parameter | Typical Value | Unit | | :--- | :--- | :--- | | **Operating Frequency** | 315 / 433.92 (Region dependent) | MHz | | **Operating Voltage** | 3.0 – 5.5 | VDC | | **Sensitivity** | -108 to -110 | dBm | | **Operating Current** | 3.5 – 5.0 | mA | | **Data Rate** | Up to 10 | Kbps | | **Modulation Type** | ASK / OOK | - | --- ### 2. Core Electronic Components The architecture of the TOAD347-RXC consists of several critical stages: #### A. RF Front-End * **Antenna Input:** A 50-ohm impedance point where a tuned wire antenna is connected. * **Low Noise Amplifier (LNA):** Boosts the weak incoming radio signal while minimizing added noise. #### B. Frequency Processing * **Local Oscillator (LO):** Usually crystal-stabilized (using a SAW filter or Crystal) to ensure frequency stability and prevent drift. * **Mixer:** Combines the RF signal with the LO signal to down-convert it to an Intermediate Frequency (IF). #### C. Demodulation Stage * **Data Slicer:** Converts the analog IF signal into a digital square wave (TTL level) that can be read by a microcontroller (MCU). * **Filter:** Removes high-frequency noise to ensure the integrity of the data stream. --- ### 3. Pinout Configuration Most TOAD-series receiver modules follow a standard 4-pin or 5-pin layout: 1. **VCC:** Power Supply (Positive). 2. **DATA:** Output pin providing the demodulated digital signal. 3. **DATA (Optional):** Some modules provide a redundant data pin for stability. 4. **GND:** Ground (Negative). 5. **ANT:** Connection point for the antenna (usually a 17cm or 23cm wire). --- ### 4. Application Integration Example To interface this module with an Arduino, you would typically use the `RadioHead` or `RCSwitch` library. ```cpp // Basic connection logic void setup() { pinMode(2, INPUT); // Connect TOAD347-RXC Data pin to Pin 2 Serial.begin(9600); } void loop() { int sensorValue = digitalRead(2); // Process the binary pulses from the receiver } ``` ---