7 Channel Line Sensor

Introduction

Line sensors are used for sensing white line on dark surface or black line on light surface. This line sensor board has seven line sensors connected together. These sensors working together can follow any curved or zig-zag path. Because of multiple sensors it can even detect nodes and move on the maze of white or black lines. Line sensor consists of high intensity red LED for illumination and directional photo transistor for line sensing. Phototransistor consists of a photo transistor and convex lense. Because of precise alignment between lense and photo transistor it has very narrow viewing angle of 5 degrees. This makes this line sensor highly immune to ambient light. This sensor gives 0.18 volts on bright surface and gives 2.2V or more on the dark surface. Its output is analog in nature. Because of analog output one can write complex algorithm to follow white line using microcontroller. This sensor has very proven track record in various robotics competitions.

Specifications

• Supply: 5V, 140mA
• Sensor output: Analog out, 0.18V to 2.2V
• Illumination: Red ultra bright LED
• Sensing element: Directional photo transistor with 5 degree viewing angle
• Sensing distance: 9mm to 20mm from the surface
• Number of sensors: 7
• Distance between adjacent sensors: 18mm
• Connector: 20 pin FRC male connector
• Mounting: Ten 3mm mounting holes
• 20 pin FRC cable included

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