EXPLOR3R Building Instructions

EXPLOR3R with Touch Sensor and IR Sensor
EXPLOR3R with Touch Sensor and IR Sensor

The EXPLOR3R is the first robot in The LEGO MINDSTORMS EV3 Discovery Book. It’s a versatile wheeled vehicle that uses sensors to navigate around a room and follow lines.

Chapters 1-9 in the book use this vehicle to demonstrate the ins and outs of LEGO MINDSTORMS EV3 programming. The examples in the book show you how to make the EXPLOR3R avoid obstacles, track the IR beacon, and follow colored lines (and much more!)

Since it’s easy to build and easy to extend the design, EXPLOR3R is also a useful prototyping platform for other projects. This video shows the EXPLOR3R running Python code, and this camera sensor even extends EXPLOR3R with vision. And now you can build it too.

Just follow the instruction steps below—and add something cool!

Building the Base

EXPLOR3R
EXPLOR3R Base
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Bill of materials for the EXPLOR3R base. All parts are included in the LEGO MINDSTORMS EV3 Home Edition.

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Building the Touch Sensor Attachment

EXPLOR3R with Touch Sensor and IR Sensor
EXPLOR3R with Touch Sensor

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Building the Color Sensor Attachment

EXPLOR3R with Color Sensor
EXPLOR3R with Color Sensor

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About the author

22 Responses
  1. Tony Nguyen

    Hi Laurens,

    Can the EXPLOR3R do anything more?

    Could you post the instructions of the claw just like in the pixy video?

    Thanks

    Tony

  2. Gerry

    Hello,

    do you also provide a sample program for this robot. My problem is that I cannot really identify online programs that I can play with to learn.

    Thanks!
    Gerry

    1. Numerous sample programs for this robot can be found in The LEGO MINDSTORMS EV3 Discovery Book 🙂

      When you have the book, you can also download the sample programs from this web page.

    1. Mater Shao

      Technically you may build a one by the latest version of LDD which contains EV3 Bricks, though it may take some time–especially when spinning the beams.

    1. David Lechner

      The Core Education set has nearly all the same parts, just in different colors, with the exception of the wheels and the IR sensor. You can replace the IR sensor with the Ultrasonic sensor and you can adjust the height of the caster in back to match the larger wheels in front.

  3. Matt

    how do you program the ev3 robot to do things without the computer and just the brick for the home set edition

    please answer, and thank you.

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