LDR 5 mm Light Dependent Resistor

The LDR (Light Dependent Resistor) 5 mm is a small, light-sensitive component that changes its resistance based on the amount of light falling on it. It is used in various light-sensing applications including light meters, automatic lighting systems, and other projects requiring light detection.

Specifications

Model: LDR 5 mm
Operating Voltage: Up to 5V DC
Resistance Range: High resistance in low light, low resistance in bright light

Special Features

Compact Size: With a diameter of just 5 mm, this LDR is ideal for small-scale projects where space is limited.
High Sensitivity: Quickly responds to changes in light intensity, providing accurate light measurements.

Wiring Connections

One Lead (Positive): Connect to a voltage supply or one terminal of a fixed resistor.
Other Lead (Negative): Connect to the ground or the other terminal of the fixed resistor.
Analog Output: If using in a voltage divider circuit, connect the junction between the LDR and the resistor to an analog input on a microcontroller.

Power

Voltage Range: Operates at 5V DC.
Current Consumption: Minimal current; the LDR functions by changing its resistance rather than consuming power.

Original price was: ৳ 10.00.Current price is: ৳ 5.00.

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Specification

Overview

Input and Output

Input: The LDR reacts to light, altering its resistance based on light levels.
Output: Provides a variable voltage in a voltage divider circuit, which corresponds to the light intensity and can be measured by a microcontroller.

Physical Characteristics

Dimensions: Diameter of 5 mm.
Material: Made from light-sensitive semiconductor material.
Weight: Very lightweight and compact, making it easy to integrate into small projects.

Technical Specifications

Resistance Range: Ranges from megaohms in darkness to a few hundred ohms in bright light.
Response Time: Fast response to light changes, typically within milliseconds.

Additional Features

No Direct Power Needed: Operates without a direct power supply, relying on resistance changes in response to light.
Simple Integration: Easily used with a fixed resistor to form a voltage divider circuit for light detection.

How to Use

Connect the LDR: Set up the LDR in a voltage divider circuit. Connect one lead to a 5V power source and the other lead to a fixed resistor.
Wire to Microcontroller: Connect the junction between the LDR and the resistor to an analog input pin on your microcontroller.
Power the Circuit: Provide 5V to the circuit.
Read the Output: Measure the voltage at the junction of the LDR and resistor. This voltage will vary with the light level, and the microcontroller can read and process this data.
Adjust Sensitivity: Modify the fixed resistor value in the voltage divider circuit if needed to change the sensitivity to light.

The LDR 5 mm Light Dependent Resistor offers an effective and compact solution for light detection in various electronic projects.