The IR obstacle sensor is designed to detect nearby objects using infrared light reflection. It provides a digital output indicating the presence of obstacles, making it ideal for robotics and automation systems. Commonly used in line-following and obstacle-avoidance robots, it offers fast response and easy integration with microcontrollers.

The PIR motion sensor detects movement by sensing changes in infrared radiation from nearby objects. It is widely used in security systems, automatic lighting, and smart home applications. With adjustable sensitivity and delay settings, it provides reliable motion detection while consuming low power.

The HC-SR04 ultrasonic sensor measures distance using sound waves. It sends ultrasonic pulses and calculates distance based on the echo time. Ideal for robotics, obstacle detection, and distance measurement systems, it offers accurate and non-contact sensing, making it widely used in automation and smart devices.

The soil moisture sensor measures the water content in soil by detecting electrical resistance changes. It is ideal for smart irrigation and agriculture projects. By providing analog or digital output, it helps automate watering systems and ensures optimal plant care in gardening and farming applications.

The DHT22 is an advanced sensor offering higher accuracy and wider measurement range compared to the DHT11. It provides precise digital readings for both temperature and humidity. Suitable for environmental monitoring and smart systems, it is widely used in IoT and automation projects requiring stable and accurate data.

The DHT11 is a basic digital sensor used to measure temperature and humidity. It provides calibrated output with simple single-wire communication, making it easy to interface with microcontrollers. Ideal for beginner projects, weather monitoring, and home automation, it offers reliable performance for applications where high precision is not critical.