KY-018 Photosensitive Resistor Sensor Module
KY-018 Photosensitive Resistor Sensor Module is a compact light detection module designed to measure ambient light intensity in electronic projects. It utilizes an LDR (Light Dependent Resistor) whose resistance changes according to the surrounding light level, allowing microcontrollers to detect brightness variations through an analog signal. The module includes a built-in 10kΩ resistor forming a voltage divider for stable and accurate measurements. Operating from 3.3V to 5V, it is fully compatible with Arduino, ESP32, Raspberry Pi, STM32, and other development platforms. Its small size makes it ideal for smart lighting, automation, and light-sensitive applications.
وحدة حساس الضوء KY-018 هي وحدة إلكترونية صغيرة الحجم مصممة لقياس شدة الإضاءة المحيطة في المشاريع الإلكترونية وأنظمة التحكم الذكية. تعتمد على مقاومة ضوئية LDR تتغير قيمتها تبعاً لمستوى الإضاءة، مما يتيح للمتحكمات الدقيقة قراءة تغيرات الضوء عبر إشارة تناظرية. تحتوي الوحدة على مقاومة ثابتة 10 كيلو أوم لتكوين دائرة مقسم جهد تضمن قياسات مستقرة. تعمل بجهد يتراوح بين 3.3 فولت و5 فولت، وتتوافق مع Arduino وESP32 وRaspberry Pi وغيرها. بفضل حجمها الصغير، فهي مناسبة لمشاريع الإضاءة الذكية والاستشعار البيئي.
The KY-018 Photosensitive Resistor Sensor Module is a light-sensing module that uses a Light Dependent Resistor (LDR) to detect changes in ambient brightness. As the light intensity increases, the resistance of the LDR decreases, producing a corresponding change in the output voltage.
The module incorporates a 10kΩ fixed resistor to create a voltage divider circuit, allowing analog measurement of light intensity. By reading the output voltage through a microcontroller's analog input, users can determine relative brightness levels and implement automatic responses based on lighting conditions.
With an operating voltage range of 3.3V to 5V, the KY-018 can be directly connected to popular development boards and embedded systems. Its compact design makes it suitable for a wide variety of automation, monitoring, and educational projects.
Specifications
| Specification | Details |
|---|---|
| Model | KY-018 |
| Sensor Type | LDR (Light Dependent Resistor) |
| Output Type | Analog |
| Operating Voltage | 3.3V – 5V DC |
| Fixed Resistor Value | 10kΩ |
| Dimensions | 21 × 15 × 6 mm |
| Detection Method | Light Intensity Measurement |
| Interface | 3-Pin Connection |
| Compatibility | Arduino, ESP32, Raspberry Pi, STM32, AVR, PIC |
Pin Configuration
| Pin | Function |
|---|---|
| S | Analog Signal Output |
| VCC | Power Supply (3.3V – 5V) |
| GND | Ground |
Applications
- Automatic lighting systems
- Smart street lights
- Day/night detection
- Solar tracking projects
- Ambient light monitoring
- Brightness-controlled displays
- Home automation systems
- Energy-saving lighting control
- Educational electronics projects
- Arduino and ESP32 experiments
- Environmental sensing systems
- Light-sensitive alarms and indicators