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$ 2.95

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In stock 143 in stock
2.95 1+ units
2.80 10+ units
2.66 25+ units
2.51 100+ units

Description: The Line Follower sensor is an add-on for your RedBot that gives your robot the ability to detect lines or nearby objects. The sensor works by detecting reflected light coming from its own infrared LED. By measuring the amount of reflected infrared light, it can detect transitions from light to dark (lines) or even objects directly in front of it.

The sensor has a 3-pin header which connects directly to the RedBot Mainboard via female to female jumper wires. Use the included RedBot library to detect lines or objects. A mounting hole lets you easily connect one or more of these to the front or back of your robot chassis.

Check out the entire RedBot family of products!

Dimensions: 0.32 x 1.18 “ (8.22 x 30.14 mm)


  • 5VDC operating voltage
  • Mounting hole
  • 25mA supply current
  • Optimal sensing distance: 0.125" (3mm)


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Customer Comments

Customer Reviews

5 out of 5

Based on 4 ratings:

5 star
4 star
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1 star

Great product

It works very well for us. We use it with our BoxBot robot. The student use a small piece of velcro to attach it to the underside of their robot.

It is very small and light and we have had no problems with them at all.

Excellent Value

I’ve used this product in a number of automation projects. The Line Follower meets the K.I.S.S. principle that I strive for in my projects. It is easy to implement, performs as advertised, robust and is priced right.

Great product for the cost

I used this on the bottom of my robot to find the black goal in a maze that was styrofoam green. Worked perfectly with a very simple analog read on the OUT pin. The only problem I could see is that it needs to be a constant distance from the surface (between about 0.5cm and 2cm). Changing the distance to the surface significantly changes the output. But your robot should not be bouncing up and down in line following scenarios anyway, so great product!

Nice compact line following sensor at a reasonable price

I received a RedBot kit which was missing the line sensors so I bought these which normally come with the robot kit. They work great. They provide great detection between white and black surfaces. The kit calls for 3 sensors which is just enough to detect the line is present in the middle or crossing right or left.