LDR Light-Dependent Resistor Sensor (15mm, Analog)

30.00

Simple Analog Light Sensor. 💡 Large 15mm LDR for high sensitivity. Resistance decreases with light. Essential for light meters and dark-activated circuits in Bangladesh.

AVAILABILITY: AVAILABLE
SKU: 341

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Description

Overview: The Simple, Cost-Effective Light Sensor. The LDR (Light-Dependent Resistor) Sensor is the most basic component used to detect ambient light. This large 15mm diameter LDR offers high sensitivity, allowing it to detect a wide range of light levels from near darkness to full brightness. Its operational principle is simple: its resistance DECREASES as the light intensity INCREASES. By connecting it to a simple voltage divider circuit, you can convert the light intensity into an analog voltage signal easily read by an Arduino or other microcontroller. This is an ABSOLUTELY ESSENTIAL sensor for educational kits and low-cost light-sensing applications.

Key Technical Features: Simplicity and Wide Range. Component Type: LDR (Light-Dependent Resistor) or Photoresistor. Sensing Principle: Photoconductive (Resistance varies inversely with incident light). Diameter: 15mm (Larger size provides higher sensitivity). Output Type: Analog Resistance (Requires external resistor for analog voltage output). Resistance in Dark: HIGH resistance (typically >1M Ohms). Resistance in Light: LOW resistance (typically <10k Ohms). Response Time: Slower response time (lag) makes it ideal for AVERAGING LIGHT LEVELS rather than rapid flashing detection.

Applications: Automated Lighting and Security. This LDR sensor is expertly suited for: Building DARK-ACTIVATED SWITCHES (e.g., automatic street lights), creating SIMPLE LIGHT METERS, implementing DAY/NIGHT SENSING for solar panels and alarms, basic LINE-FOLLOWING ROBOTS (when paired with an LED), and use in EDUCATIONAL KITS for teaching analog sensor concepts.

Safety Warning and Usage Notes (CRITICAL). The LDR is a RESISTOR, not an active sensor. It MUST be wired in a VOLTAGE DIVIDER CIRCUIT with a fixed series resistor to convert its varying resistance into a varying voltage suitable for a microcontroller's Analog-to-Digital Converter (ADC).

Projectile Electronics Quality and Trust. We guarantee high-quality LDR sensors with consistent and reliable resistance ranges, ensuring your ambient light-sensing projects function predictably and correctly.

Package Includes: 1 × LDR Light-Dependent Resistor Sensor (15mm).