The **MH16TAD-R** is an infrared (IR) receiver module commonly used in remote control systems. It is designed to receive modulated IR signals (typically at a specific frequency) and convert them into electrical pulses that a microcontroller can interpret. Below is a detailed breakdown of its specifications, pinout, and functional characteristics. --- ### 1. Technical Specifications The MH16TAD-R belongs to the family of miniaturized receivers for infrared remote control systems. | Feature | Specification | | :--- | :--- | | **Carrier Frequency** | 38 kHz (Standard for most consumer electronics) | | **Operating Voltage** | 2.7V to 5.5V DC | | **Supply Current** | 0.5mA to 1.5mA | | **Reception Distance** | Up to 15–20 Meters (depending on transmitter power) | | **Reception Angle** | ± 45 Degrees | | **Output Level** | Active Low (Logic 0 when signal is detected) | --- ### 2. Pin Configuration The module typically features three pins. Looking at the front of the sensor (the side with the "bulb" or lens), the pins are usually ordered as follows: | Pin Number | Name | Description | | :--- | :---: | :--- | | 1 | **OUT** | Data output signal; connects to a microcontroller I/O pin. | | 2 | **GND** | Ground (0V). | | 3 | **VCC** | Power supply (typically +5V or +3.3V). | *Note: Always verify the pinout with a multimeter or datasheet for your specific batch, as some manufacturers swap GND and VCC.* --- ### 3. Internal Block Components The MH16TAD-R is not just a phototransistor; it is an Integrated Circuit (IC) that contains several stages of signal processing: 1. **Photodiode:** Converts IR light into a tiny electrical current. 2. **Preamplifier:** Boosts the weak signal from the photodiode. 3. **Automatic Gain Control (AGC):** Adjusts sensitivity to compensate for ambient light noise. 4. **Band Pass Filter:** Specifically tuned to **38kHz** to ignore signals from sunlight or light bulbs. 5. **Demodulator:** Strips the 38kHz carrier wave to leave the original binary data. --- ### 4. Implementation Example (Arduino) To use this part with an Arduino, you can use the following basic connection logic: ```cpp // Basic code snippet to read IR signals #include const int RECV_PIN = 7; // Connect OUT pin to Digital Pin 7 IRrecv irrecv(RECV_PIN); decode_results results; void setup() { Serial.begin(9600); irrecv.enableIRIn(); // Start the receiver } void loop() { if (irrecv.decode(&results)) { Serial.println(results.value, HEX); // Print the hex code of the button pressed irrecv.resume(); // Receive the next value } } ``` ---