Ligth Depending Resistor (Sensor Cahaya)

The LDR (Light Dependent Resistor), also known as a photoresistor, is a type of resistor whose resistance decreases with increasing incident light intensity. It is commonly used in light-sensing applications where the resistance change needs to be detected in response to varying light levels. LDRs are ideal for projects like light meters, automatic lighting systems, solar trackers, and any system where light levels are monitored and adjusted automatically. This simple and cost-effective sensor is perfect for integration with microcontrollers such as Arduino and Raspberry Pi.

Key Features:

• Light Sensitive: Resistance varies based on the intensity of light falling on the sensor.
• Operating Voltage: 3.3V – 5V (compatible with most microcontrollers).
• Wide Sensitivity Range: Detects light from low to bright light levels.
• Simple Interface: Easily interfaced with Arduino, Raspberry Pi, and other microcontrollers.
• Fast Response Time: Detects changes in light intensity quickly for real-time applications.
• Durable & Reliable: Long-lasting and low maintenance.

Technical Details

How It Works:

The LDR works on the principle that its resistance decreases when exposed to light and increases in the dark. In bright light, the resistance may drop to as low as 1kΩ, while in the absence of light (dark), the resistance can increase to several megaohms. This change in resistance can be measured using a voltage divider circuit with a fixed resistor, and the corresponding voltage can be read by a microcontroller’s analog-to-digital converter (ADC). By monitoring the voltage, you can infer the amount of light falling on the sensor.

Applications:

• Automatic Lighting Systems: Control lights based on ambient light levels.
• Solar Tracking Systems: Track and align solar panels based on sunlight intensity.
• Light Meters: Measure the intensity of light in photography and environmental monitoring.
• Outdoor and Indoor Lighting Control: Adjust lighting for energy efficiency and comfort.
• Alarm Systems: Detect changes in light levels for security applications.

Package Includes:

• ✔ 1 x LDR Photoresistor

Why Choose the LDR (Light Dependent Resistor)?✅ Affordable & Simple: Low-cost and easy-to-use component for a wide range of projects.
✅ Wide Light Sensitivity Range: Works in both low-light and high-light conditions.
✅ Low Power Consumption: Ideal for battery-powered and energy-efficient projects.
✅ Versatile Applications: Can be used in lighting control, solar energy, security systems, and more.
✅ Easy to Interface: Simple connection to microcontrollers for quick prototyping and implementation.