IR receiver specification overall details with work info...

IR receiver specification overall details with work info

An --- IR receiver module --- is a integrated device designed to detect, filter, amplify and demodulate infrared signals. It is consists of multiple components combined to provide reliable detection of infrared signals typically used in remote #controlled devices. 

Below is a detailed breakdown of the components typically found in an IR receiver module:--- 

1. Photodiode or Phototransistor 

• Function:-- Detects infrared light and converts it into a small electrical current. 

• Characteristics:-- 

• Sensitive to IR wavelengths [typically 850–950 nm]. 

• Often encapsulated in a black or dark plastic case to filter visible light. 

2. Bandpass Filter 

• Function:-- Allows only signals of a specific frequency 38 kHz●to pass through. 

• Characteristics:-- 

• Filters out noise and ambient light interference. 

• Ensures that only modulated IR signals from remote controls are processed. 

3. Amplifier 

• Function:-- Increases the strength of the weak electrical signal generated by the photodiode. 

• Characteristics:-- 

• Boosts the signal to a level suitable for demodulation. 

• Ensures reliable operation even at longer distances. 

4. Demodulator 

• Function:-- Decodes the modulated signal by removing the carrier frequency○ 38 kHz. 

• Characteristics:-- 

• Outputs a clean digital signal :high and low pulses: corresponding to the original command. 

• Filters noise and only processes the modulated IR signal. 

5. Voltage Regulator 

• Function:-- Regulates the input voltage to the appropriate level [ 3.3V or 5V]required by internal components. 

• Characteristics:¤ 

• Ensures stable operation under varying power supply conditions. 

• Protects the module from overvoltage damage. 

6. Control Logic Circuit 

• Function:□ Ensures that the signal is processed correctly and outputs a usable signal. 

• Characteristics:☆ 

• Processes the signal and provides a clean, inverted output (active low typically). 

• Adds additional filtering and stability. 

7. Infrared--Transparent Casing 

• Function:-- Encases the components and filters visible light. 

• Characteristics:-- 

• Typically made of dark plastic to block visible light while allowing IR signals to pass through. 

• Improves the signal to noise ratio by reducing ambient light interference. 

8. Output Pin 

• Function:-- Provides the demodulated signal to an external microcontroller or circuit. 

• Characteristics:-- 

• Outputs a digital signal HIGH//LOW pulses. 

• Can be directly interfaced with microcontrollers like Arduino or Raspberry Pi. 

9. Ground (-GND-) Pin 

• Function:-- Provides a return path for the current in the circuit. 

10. Power Pin (+Vcc+) 

• Function:-- Supplies power to the module. 

• Characteristics:-- 

• Commonly operates at 3.3V or 5V. 

• Includes internal circuitry for voltage regulation if required. 

Example:-- Components of TSOP1738 [Popular IR Receiver Module] 

ComponentDetailsPhotodiodeIR-sensitive photodiode tuned to ~940 nm wavelength.Bandpass FilterPasses signals modulated at 38 kHz frequency.AmplifierIntegrated for signal boosting.DemodulatorInternal IC to extract the original signal.Voltage RangeOperates at 2.7V to 5.5V.Current Consumption~~1.5 mA.Output FormatActive LOW digital signal.CasingEpoxy package with IR filter. 

Pin Configuration (General) 

Most IR receiver modules have 3 pins:□ 

• Vcc:《 Power supply (3.3V/5V). 

• GND:《 Ground. 

• OUT: Signal output (connects to a microcontroller or circuit). 

Internal Schematic (Simplified View) 

• Photodiode:-- Detects IR light. 

• Amplifier:-- Boosts weak signals. 

• Bandpass Filter:-- Filters noise and allows specific frequency. 

• Demodulator:-- Extracts data. 

• Output Stage:-- Provides clean signal output. 

If you are using a specific IR receiver module and need detailed datasheets or want to know how to interface it let me know♡ 

How to work an IR receiver 

An IR receiver (infrared receiver) is an electronic component designed to detect and process infrared light signals. It is commonly used in devices like LED TVs - DVD players, air conditioners, and remote-controlled toys. Here’s how it works:-- 

1. Basic Principle 

• IR Signal Emission:-- A remote control emits infrared light signals as pulses encoded with specific commands. 

• Reception:-- The IR receiver detects these signals, converts them into electrical signals and sends them to the device's microcontroller for decoding. 

2. Components of an IR Receiver 

An IR receiver typically includes:-- 

• Photodiode or Phototransistor:-- Detects infrared light. 

• Filter:-- Blocks unwanted light from other sources sunlight or incandescent bulbs. 

• Amplifier:-- Boosts the weak signal detected by the photodiode. 

• Demodulator:-- Decodes the signal by extracting the command from the modulated carrier frequency (-typically 38 kHz-). 

• Output Pin:-- Sends the decoded signal as an electrical pulse to the microcontroller. 

3. Working Mechanism 

• Carrier Modulation:-- 

• The remote control sends signals as pulses of IR light at a specific carrier frequency  38 kHz. 

• This modulation helps distinguish the remote's signal from ambient IR light. 

• Signal Reception:-- 

• The IR receiver detects the IR pulses using its photodiode. 

• Ambient light or noise is filtered out. 

• Demodulation:-- 

• The receiver extracts the data encoded in the modulated signal. 

• It outputs a clean signal (high//low digital pulses) that represents the command. 

• Command Interpretation:-- 

• The microcontroller interprets the signal and performs the associated action increasing volume. 

4. Applications 

• Remote controls TVs, ACs, projectors. 

• Data communication  IrDA protocols in older devices. 

• Sensor systems object detection. 

5. Common IR Receiver Modules 

• TSOP Series TSOP1738:-- Popular for hobbyists and consumer electronics. 

• VS1838B:-- Compact widely used in DIY projects. 

These modules simplify the process by integrating all necessary circuitry, making it easy to interface with microcontrollers like Arduino or Raspberry Pi. 

How to Use with Arduino 

• Connect the IR Receiver:-- 

• Signal pin to a digital input pin. 

• Power (Vcc+) and ground (GND-) to corresponding pins. 

• Install a Library:-- 

• Use the IRremote library for Arduino. 

• Write Code:-- 

• Use the library to decode the signal from a remote control. 

• Output:-- 

• The microcontroller can interpret and perform tasks based on the received IR command. 

Let me know if you need guidance for a specific project or example code》

Also ir receiver used in school science project etc.