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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.
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This skill concerns mechanical and robotics knowledge. You may need to know how mechanical parts interact, how motors work, or how to use motor drivers and controllers.
Skill Level: Noob - You will be required to put together a robotics kit. Necessary parts are included and steps will be easy to follow. You also might encounter basic robotics components like bearings, mounts, or other hardware and need a general idea of how it goes together.
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If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.
Skill Level: Rookie - You will need a better fundamental understand of what code is, and how it works. You will be using beginner-level software and development tools like Arduino. You will be dealing directly with code, but numerous examples and libraries are available. Sensors or shields will communicate with serial or TTL.
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If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
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Based on 6 ratings:
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.
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.
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!
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.
Works great. Used two on the robot to follow a line.
I am using them to build a quadrature decoder. I have them pointing against a white disk with black lines done on a laser printer. I was afraid I was going to have to put a comparator on each sensor, but the natural logic levels of my receiving device (an ASIC) matches the outputs of the sensor. And I am pleased to see this product has a mounting hole! So many SFE parts do not :( Only issue is that a full size #4 washer comes awfully close to the 2 SMT resistors if you have the head on the fastener on the sensor side. Solution is to use a smaller OD washer.