LDR Photoresistor

LDR Photoresistor Australia
LDR Photoresistor Australia
Product ID: LB-LR0282


We have 207 units of the LDR Photoresistor in stock at our Sydney warehouse.

If ordered before 2pm, this part would be delivered on or before Thursday, May 23 to most parts of Australia.

We can get a further 1000 units.
If you order today we can dispatch this stock between Monday, Jun 03 and Thursday, Jun 06 2019.

Updated 15 days ago
Data Sheets & Documents
Updated about 1 year ago
Updated 15 days ago
Little Bird's Description of the LDR Photoresistor


This Light Dependant Resistor (LDR) can be used to easily measure ambient light with your Arduino or other board with analog input. You will need to set this up as a voltage divider with a resistor of around 10KΩ.



Maximum voltage: 150V, DC
Maximum wattage: 90mW
Operating temperature:  -30°C ~ 70°C
Spectral peak: 540nm
Bright resistance (10Lux) (KΩ): 5 - 10
Dark resistance: 0.5 MΩ
100λ10: 0.5
Response time: 20ms (Rise), 30ms (Down)
Resistance illumination: 2

LDR Photoresistor is listed in:
LDR Photoresistor Guides
Light Dependent Resistor

Light-dependent resistors, also known as photo-resistors, are sensors that allow the detection of light. They are not only useful but are small and inexpensive. 

In this guide, you will learn to use a light-dependent resistor with the Arduino. We will use a Little Bird Uno R3 board, a mini breadboard, a 10k ohm resistor, some jumper wires, and a light-dependent resistor. You will learn to hook it up to the Arduino board, and measure the relative brightness of the environment.

Some examples of projects that require the use of light-dependent resistors include a noisemaker and a line-following robot.

Control a Servo with Arduino

Servos are a basic component in many Arduino projects.

In this guide, we will learn how to switch on a servo, make it press a button, and take a photo with the micro servo and a 100% Arduino compatible development board, the Little Bird Uno R3.

Learning to control a servo motor will enable you to create all sort of projects, from robotic arms to DIY catapults and cocktail machines.

Laser Sensor with Arduino

Ever seen grids of laser beams protecting valuables? Then you've probably seen a laser sensor module at work. The laser beams may seem high-tech, but the principles behind them are simple. 

In this guide, you will get familiar with the laser sensor module and use it with an Arduino to create a simple tripwire alarm system. It will let you know if anyone is sneaking about!

After completing this guide, you will understand how to use a laser sensor module and can go on to create projects of your own! 

Use Analogue Sensors with Raspberry Pi

While the Raspberry Pi can control digital inputs and outputs, what if you wanted to read analog signals? 

In this guide, we'll connect up an Analogue to Digital Converter (the MCP3008) to the Raspberry Pi, and then connect a light dependent resistor (LDR) or light sensor to it. We will then program it to read and output values from the LDR.

After completing this guide, feel free to connect other analogue sensors to your Raspberry Pi!