Brand: VEX Robotics
Product Code: 276-2158
Availability: In Stock

The light sensor uses a photocell that allows your robot to detect and react to light. With the light sensor, you can program a whole new range of capabilities to your robot. A Programming Kit is needed to change the program in the VEX Controller.

  • Analog input of light levels.
  • Usable range of 0 to 6 feet.
  • Find dark or bright areas.
  • Create more autonomous function.



Function:The light sensor enables a robot to detect light. Robots can be programmed to have a specific reaction if a certain amount of light is detected. The light sensor uses a cadmium sulfosolenide (CdS) photoconductive photocell. The CdS photocell is a photo resistor, meaning that its resistance value changes based on the amount of incident light.

Uses: Design a simple tracker that follows the beam of a flashlight, or use a light sensor to help your robot to avoid getting stuck under furniture by making it steer away from shadows. You can even give your robot color vision by putting colored filters on different light sensors!

Technical Specifications

Kit Contents
  • (1)Light sensor
Downloads & Docs Documentation
Instruction Sheet - Light Sensor
Compatibility All VEX Microcontrollers.
3-Wire Extension Cables.
  • Type:Light
Outputs 3-Wire Cable
Connect to an analog input.
  • Black:ground
  • Red:+5V
  • White:control signal
  • Sensor:cadmium sulfosolenide (CdS) photoconductive photocell
  • Sensor Type:photo-resistor
  • Light sensor0.026 lbs (11.8 grams) Actual weight one one item (no packaging)