// PS2 Joystick Module Example
const int VRx = A0;
const int VRy = A1;
const int SW  = 2;

int xValue, yValue, buttonState;

void setup() {
  Serial.begin(9600);
  pinMode(SW, INPUT_PULLUP); // Button is active LOW
}

void loop() {
  xValue = analogRead(VRx);
  yValue = analogRead(VRy);
  buttonState = digitalRead(SW);

  Serial.print("X: "); Serial.print(xValue);
  Serial.print(" | Y: "); Serial.print(yValue);
  Serial.print(" | Button: ");
  Serial.println(buttonState == LOW ? "Pressed" : "Released");

  delay(300);
}

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Infrared Obstacle Avoidance IR Sensor Module (Active Low)

The Infrared Obstacle Avoidance IR Sensor Module (Active Low) is a compact and efficient sensor designed
to detect obstacles using infrared light. It features a pair of IR transmitting and receiving tubes, making it ideal
for robotics, automation, and smart vehicle applications.

When an object comes within range, the emitted infrared light reflects back to the receiver.
The onboard comparator circuit processes the signal and triggers the output pin
with a low-level signal, while the onboard indicator LED lights up to show detection.

Key Features

• Easy to use and integrate with Arduino, Raspberry Pi, AVR, PIC, and other microcontrollers
• Onboard detection LED indicator for real-time feedback
• Adjustable sensitivity via onboard preset potentiometer
• Effective detection range: 2 cm to 80 cm (adjustable)
• Active-Low digital output (LOW signal when obstacle detected)
• Works with 3.3V to 5V logic levels
• Compact and lightweight module design
• Ideal for obstacle detection in robots, vehicles, and automation systems

Technical Specifications

How It Works

The IR sensor continuously emits infrared light through its transmitter. When an object or obstacle comes close,
the light reflects back to the receiver. The onboard comparator checks the signal strength, and if it crosses the set
threshold, the output pin goes LOW and the indicator LED turns ON.

The sensitivity can be fine-tuned using the onboard potentiometer to adjust detection range
depending on environmental lighting or material reflectivity.

Pin Configuration

Applications

• Obstacle detection for mobile robots and cars
• Smart automation systems
• Line-following and collision-avoidance robots
• Proximity and distance sensing
• Object counter systems
• DIY electronics and STEM learning projects

Package Includes

• 1 × Infrared Obstacle Avoidance IR Sensor Module (Active Low)

Tip: For best accuracy, avoid direct sunlight or highly reflective surfaces during operation, as they may interfere with IR detection.

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1-Channel 5V Relay Module (SPDT, Opto-Isolated, High-Level Trigger)

The 1-Channel 5V Relay Module (SPDT) allows your microcontroller — such as Arduino, Raspberry Pi, PIC, AVR, or ARM —
to control high-voltage devices like lights, fans, motors, and home appliances safely and easily.

Equipped with an opto-isolated input, it provides complete protection to your control circuit from voltage spikes.
This compact, reliable, and beginner-friendly module can switch up to
10A at 250V AC or 30V DC, making it perfect for automation, IoT, and robotics projects.

Key Features

• 1-Channel 5V control relay module (SPDT type)
• High-level trigger input for direct MCU control
• Handles up to 250V AC / 10A or 30V DC / 10A
• Opto-isolated input for circuit safety and reliability
• Status indicator LED shows relay activation
• Compatible with Arduino, AVR, PIC, ARM, Raspberry Pi, etc.
• Screw terminals for easy wiring
• Compact design with mounting holes for installation
• Complies with international safety standards

Important Note

Some modules may have a printing error (e.g., “250VAC → 30VAC” or “125VAC → 28VAC”).
Please note that the actual working specification remains correct: 250VAC / 30VDC at 10A.

Technical Specifications

Pin Description

Connection Diagram

Relay Output Terminals

Additional Features

• One normally closed (NC) and one normally open (NO) contact
• Built-in pull-down circuit to prevent false triggering
• Power indicator lamp for easy troubleshooting
• High-impedance controller pin for stable signal input
• Can control a variety of high-current devices and equipment
• Standard TTL level logic compatible

Applications

• Home Automation Systems
• IoT Control and Monitoring
• Robotics Projects
• Smart Switches and Lighting
• DIY Electronics and Prototyping
• Load Switching for AC/DC Devices

Package Includes

• 1 × 1-Channel 5V Relay Module (SPDT, High-Level Trigger)

Tip: For improved safety, always use proper insulation when switching high-voltage AC loads.

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M177 NRF24L01+ 2.4GHz Antenna Wireless Transceiver Module – High-Speed, Low-Power RF Communication for IoT & Robotics

The M177 NRF24L01+ 2.4GHz Antenna Wireless Transceiver Module is a compact and ultra-efficient RF module designed for reliable wireless communication in the 2.4GHz ISM band. It delivers high performance with low power consumption, making it ideal for IoT devices, robotics, and remote sensor networks.

Built around Nordic’s advanced NRF24L01+ chipset, this module supports both transmit and receive operations, enabling point-to-point or multi-node communication. It’s widely compatible with Arduino, Raspberry Pi, ARM, Mbed, and other popular microcontrollers — providing easy integration for developers and makers.

Key Features

• High-Speed Wireless Data: Supports up to 2 Mbps transfer rate with GFSK modulation for stable, interference-free communication.
• Ultra Low Power Design: Consumes less than 1 µA in power-down mode and under 14 mA during transmission/reception.
• Optimized for Battery Operation: Ideal for coin cell, AA, or AAA-powered systems with extended battery life.
• Wide Compatibility: Works seamlessly with Arduino, Raspberry Pi, ARM, and Mbed controllers.
• Integrated 2.4GHz Antenna: Ensures strong, stable wireless communication without external components.
• 125 Communication Channels: Supports frequency hopping and multi-point networking for robust communication.
• Built-in CRC & Address Control: Provides error-free, secure, and stable data transmission.
• Easy Integration: DIP pin spacing and onboard voltage regulation simplify prototyping and circuit design.

Technical Specifications

Highlights

• Ideal for IoT, robotics, and wireless control systems.
• Supports multi-node communication and frequency hopping for robust connections.
• Fully compatible with Arduino RF24 and Mirf libraries.
• Ultra-low power consumption ensures long battery life in portable devices.
• Simple SPI interface for plug-and-play integration with microcontrollers.

Applications

• Smart Home & IoT Devices
• Robotics and Remote-Controlled Systems
• Wireless Sensor Networks
• Industrial Automation & Monitoring
• Data Transmission & Telemetry Projects

Package Includes

• 1 × M177 NRF24L01+ 2.4GHz Antenna Wireless Transceiver Module

Experience reliable, high-speed wireless communication with the NRF24L01+ — the trusted choice for IoT, robotics, and embedded projects.

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