The **MH47TDG-R** is an electronic component primarily associated with **Infrared (IR) Receiving Modules**, commonly used in consumer electronics for remote control signal processing. Below is a detailed breakdown of its specifications, pinout, and functional characteristics. --- ### 1. General Overview The MH47TDG-R is a miniaturized receiver for infrared remote control systems. It integrates a PIN photodiode and a preamplifier IC into a single lead frame, often housed in an epoxy package that acts as an IR filter. ### 2. Technical Specifications | Parameter | Typical Value | |:---|:---| | **Carrier Frequency** | 38 kHz (Standard for most IR remotes) | | **Supply Voltage (Vcc)** | 2.7V to 5.5V | | **Operating Current** | 0.4mA – 1.5mA | | **Reception Distance** | 10 – 15 meters | | **Reception Angle** | ±45 Degrees | | **Output Logic** | Active Low (Gives 0V when signal is detected) | --- ### 3. Pin Configuration Most modules in this series follow a standard 3-pin layout. Note that you should always verify with a multimeter or specific datasheet as manufacturers sometimes swap Vcc and Signal pins. | Pin Number | Name | Description | |:---:|:---|:---| | 1 | **Vout** | Demodulated output signal to Microcontroller | | 2 | **GND** | Ground (0V) | | 3 | **Vcc** | Power Supply (Typically 5V or 3.3V) | --- ### 4. Key Functional Features * **Internal Filter:** It contains a band-pass filter to block out ambient light interference (like sunlight or fluorescent lamps). * **Automatic Gain Control (AGC):** Automatically adjusts sensitivity to maintain a stable output regardless of the distance of the remote. * **TTL/CMOS Compatibility:** The output signal can be directly connected to a digital pin on an Arduino, ESP32, or Raspberry Pi without extra circuitry. ### 5. Common Application Circuit To use the MH47TDG-R in a project, a simple RC filter is recommended to stabilize the power supply: ```cpp // Schematic Concept: // [Vcc] ---- [100 Ohm Resistor] ----+---- [Pin 3: Vcc] // | // [47uF Capacitor] // | // [GND] ----------------------------+---- [Pin 2: GND] // // [MCU Pin] ----------------------------- [Pin 1: Vout] ``` --- ### 6. Applications * Televisions and Home Theater systems. * Air conditioning control units. * Arduino/Robotics remote control projects. * IR data links.