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...
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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.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- photocell
- A light-sensitive component whose electrical resistance changes with the amount of light falling on it. It matters when choosing or using light sensors, automatic lights, or brightness-detecting circuits because its response speed, resistance range, and sensitivity affect how reliably it detects light levels.
- 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.
- through-hole
- A mounting style where the component leads pass through holes in a circuit board and are soldered on the other side. Through-hole parts are often easier to handle and solder by hand, which is useful for classroom and hobby projects.
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Sensors & Input
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