The **TX16-R3T** is a high-performance infrared (IR) transmitter module commonly used in remote control systems, optical communication, and sensor applications. It is often paired with an "R1" or "R2" series receiver. --- ### ## Key Electronic Components & Specifications The internal circuitry of a TX16-R3T typically consists of a high-output IR LED, a driver transistor, and modulation circuitry to ensure signal stability. | Feature | Specification | | :--- | :--- | | **Operating Voltage** | 3.3V to 5.0V DC | | **Peak Wavelength** | 940nm (Infrared) | | **Transmission Distance** | 10 – 15 meters (depending on voltage) | | **Carrier Frequency** | Typically 38kHz (standard for IR remotes) | | **Input Interface** | 3-Pin (VCC, GND, Signal/Data) | --- ### ### Technical Breakdown 1. **Infrared Emitter (LED):** The core component is a 940nm Gallium Arsenide (GaAs) LED. Unlike standard LEDs, these are optimized for high-speed switching to facilitate data transmission. 2. **Modulation Circuitry:** To prevent interference from ambient light (like sunlight or indoor lamps), the TX16-R3T modulates the data signal onto a carrier frequency (usually 38kHz). This ensures the receiver only "listens" to the specific pulses sent by the transmitter. 3. **Driver Stage:** Since microcontrollers (like Arduino or ESP32) cannot provide high current, the module includes a small transistor or buffer IC to drive the IR LED at higher power levels for better range. --- ### ### Pinout Diagram | Pin | Name | Description | | :--- | :--- | :--- | | 1 | **VCC** | Power Supply (3.3V - 5V) | | 2 | **GND** | Ground | | 3 | **DAT / SIG** | Input Signal from MCU (Pulse Width Modulation) | --- ### ### Basic Wiring Example (Arduino) To use this module, you connect the signal pin to a PWM-capable digital pin on your controller. ```cpp // Example: Sending a simple IR signal using the IRremote library #include const int IR_PIN = 3; // Signal pin connected to TX16-R3T void setup() { IrSender.begin(IR_PIN); } void loop() { // Send a Sony protocol signal IrSender.sendSony(0x1, 0x12, 2); delay(2000); } ```