The SR602 is a dual-channel infrared receiver module designed for remote control applications. It operates at a frequency of 38 kHz and is capable of receiving signals from infrared remote controls. This makes it an ideal choice for consumer electronics, home automation systems, and other applications requiring reliable infrared signal reception. Its compact design and high sensitivity allow it to be easily integrated into a variety of devices.
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This circuit is an emergency alert system that uses a NUCLEO-F072RB microcontroller to send SMS alerts and make calls via a SIM800L GSM module, while obtaining location data from a GPS NEO 6M module. The system is powered by a Li-ion battery and includes a TP4056 module for battery charging and protection, with a rocker switch to control power to the microcontroller.
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This circuit is designed to measure force using multiple force sensing resistors (FSRs) and transmit the data wirelessly via an HC-05 Bluetooth module. An Arduino UNO microcontroller reads the analog signals from the FSRs, processes the data, and communicates with the MPU6050 sensor for additional motion sensing capabilities.
This circuit is a sensor-based data acquisition system using an Arduino Nano, which collects data from a GSR sensor, an ADXL377 accelerometer, and a Neo 6M GPS module. The collected data is then transmitted via a WiFi module (ESP8266-01) for remote monitoring. The system is powered by a 12V battery, which is charged by a solar panel.
Remote-controlled consumer electronics (e.g., TVs, DVD players)
Home automation systems
Infrared communication systems
Robotics and IoT projects
Arduino-based remote control projects
Technical Specifications
The SR602 module is designed to provide reliable performance in infrared signal reception. Below are its key technical specifications:
Parameter
Value
Operating Voltage
2.7V to 5.5V
Operating Current
≤ 1.5 mA
Carrier Frequency
38 kHz
Reception Distance
Up to 18 meters (line of sight)
Reception Angle
±45°
Output Signal
Digital (active low)
Response Time
≤ 2 ms
Operating Temperature
-25°C to +85°C
Dimensions
7.5 mm x 5.5 mm x 3.0 mm
Pin Configuration
The SR602 module has three pins, as described in the table below:
Pin
Name
Description
1
VCC
Power supply pin (2.7V to 5.5V)
2
GND
Ground pin
3
OUT
Digital output pin (active low when signal detected)
Usage Instructions
The SR602 is straightforward to use in a circuit. Follow the steps below to integrate it into your project:
Connecting the SR602
Power Supply: Connect the VCC pin to a 3.3V or 5V power source, depending on your system's voltage.
Ground: Connect the GND pin to the ground of your circuit.
Output Signal: Connect the OUT pin to a digital input pin of your microcontroller or other logic circuit.
Important Considerations
Ensure the module is aligned with the infrared transmitter for optimal signal reception.
Avoid placing the module in direct sunlight or near strong light sources, as this may interfere with its operation.
Use a pull-up resistor (typically 10kΩ) on the OUT pin if required by your circuit design.
Example: Using SR602 with Arduino UNO
Below is an example of how to use the SR602 module with an Arduino UNO to detect infrared signals:
// Example code for interfacing SR602 with Arduino UNO
// This code reads the digital output from the SR602 and prints the status to the Serial Monitor.
const int IR_PIN = 2; // Connect the SR602 OUT pin to Arduino digital pin 2
void setup() {
pinMode(IR_PIN, INPUT); // Set IR_PIN as input
Serial.begin(9600); // Initialize serial communication at 9600 baud
}
void loop() {
int irSignal = digitalRead(IR_PIN); // Read the state of the SR602 OUT pin
if (irSignal == LOW) {
// Signal detected (active low output)
Serial.println("Infrared signal detected!");
} else {
// No signal detected
Serial.println("No infrared signal.");
}
delay(500); // Wait for 500 ms before reading again
}
Best Practices
Use decoupling capacitors (e.g., 0.1 µF) near the VCC pin to reduce noise and improve stability.
Keep the module away from high-frequency circuits or electromagnetic interference sources.
Troubleshooting and FAQs
Common Issues and Solutions
No Signal Detected:
Cause: Misalignment between the SR602 and the infrared transmitter.
Solution: Ensure the transmitter is within the module's reception angle (±45°) and within the specified range (up to 18 meters).
False Signal Detection:
Cause: Ambient light interference or electrical noise.
Solution: Shield the module from direct sunlight and fluorescent lights. Add a decoupling capacitor to the power supply.
Output Pin Always LOW:
Cause: Faulty wiring or damaged module.
Solution: Verify the connections and ensure the module is receiving the correct voltage. Replace the module if necessary.
Output Pin Always HIGH:
Cause: No infrared signal or weak signal strength.
Solution: Check the alignment and distance between the transmitter and receiver. Ensure the transmitter is functioning correctly.
FAQs
Q1: Can the SR602 work with 3.3V systems?
A1: Yes, the SR602 operates within a voltage range of 2.7V to 5.5V, making it compatible with both 3.3V and 5V systems.
Q2: What is the maximum range of the SR602?
A2: The SR602 can receive infrared signals up to 18 meters in a clear line of sight.
Q3: Does the SR602 require additional components to function?
A3: No additional components are required for basic operation. However, a pull-up resistor or decoupling capacitor may be used for improved performance in specific circuits.
Q4: Can the SR602 detect signals from any infrared remote control?
A4: The SR602 is designed to detect signals modulated at 38 kHz, which is the standard frequency for most infrared remote controls.
By following this documentation, you can effectively integrate the SR602 into your projects and troubleshoot any issues that arise.
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