Little Bird
5mm 5800B Universal Photoresistor Light-Dependent Resistance switch
A pack of 50 through-hole photoresistors (light-dependent resistors / LDRs) with a 5 mm diameter sensing element. These components change their resistance ba...
A pack of 50 through-hole photoresistors (light-dependent resistors / LDRs) with a 5 mm diameter sensing element. These components change their resistance based on the amount of light hitting the sensor — resistance decreases as light intensity increases — making them a simple and inexpensive way to detect ambient light levels.
Photoresistors are commonly used in automatic lighting systems, light-following robots, and basic light-level sensing circuits. They pair well with a voltage divider and an analogue input on any microcontroller such as Arduino or Raspberry Pi.
Key Features
- 50-Piece Pack – Bulk quantity for classrooms, prototyping, or multiple projects
- 5 mm Diameter – Standard through-hole form factor, breadboard-friendly
- Analogue Light Sensing – Resistance varies with ambient light intensity
- Simple to Use – No special library or protocol required; works with a basic voltage divider
Specifications
- Type – 5800B Photoresistor (LDR)
- Diameter – 5 mm
- Package – Through-hole
- Quantity – 50 pieces
Ideal For
- Automatic night lights and street lighting controllers
- Light-following or light-avoiding robots
- Ambient light detection for displays and dashboards
- Educational electronics and Arduino/Raspberry Pi projects
Jargon buster
Plain-language definitions for the technical terms used above.
- LDR
- A light-dependent resistor is a component whose resistance changes with light level. It is useful for simple brightness sensing, and an ADC board is needed to turn its changing analogue voltage into numbers a microcontroller or computer can read.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- photoresistor
- A light-sensitive resistor whose resistance changes depending on how much light hits it. It matters for projects such as night-lights and light alarms because it gives a simple way for a microcontroller to sense brightness.
Find this product in
Sensors & Input
Related Tutorials
Free guides on learn.littlebird.com.au
