Kōkiri Lab
Kōkiri Lab

Robotics & Systems/NuiBot/Build Library

Build Library

Concrete builds you can follow with a standard EV3 Education Core Set, plus modules that bolt on. Every build lists its wiring so generated code always matches.

Kōkiri standard wiring

Left drive motor B, right drive motor C, medium motor A, touch 1, gyro 2, colour 3, ultrasonic 4.

The base robot uses LEGO's own free instructions.

Link to LEGO's Robot Educator "Driving Base" PDF from the EV3 Core Set; we don't copy its pages here (LEGO copyright). If that link disappears now that EV3 is retired, follow the Kōkiri Base instructions below instead.

  • B0: Kōkiri Base (or LEGO Driving Base)

    Two-motor driving robot with a rear caster, brick on top, front bumper with mounting holes.

    Wiring: Motors B and C

    Test: Run Example 01 (drive a square). Does it come back to the start? Measure how far off it is.

    Measure and record wheel diameter (mm) and axle track (mm) -- these go into every program.

    Step-by-step photos and instructions coming soon

  • B1: Sensor Mast (front)

    Holds the ultrasonic sensor facing forward at about 10 cm high and the colour sensor pointing down 8 to 12 mm above the floor, both adjustable.

    Wiring: Ultrasonic 4, colour 3

    Test: Example 02 (obstacle stopper) and Example 05 (line follower).

    Step-by-step photos and instructions coming soon

  • B2: Gyro and Touch Pack

    Gyro mounted flat in the middle of the robot, away from motors; touch sensor as a front bumper or top "go" button.

    Wiring: Gyro 2, touch 1

    Test: Example 06 (gyro turn) and Example 04 (touch to deliver).

    Step-by-step photos and instructions coming soon

  • B3: Gripper Arm

    Medium motor driving a two-jaw gripper or a lifting fork at the front.

    Wiring: Medium motor A

    Test: Pick up and carry a 4 cm foam cube 50 cm.

    Safety: gear down so the gripper cannot pinch hard; no fingers in the jaws during runs.

    Step-by-step photos and instructions coming soon

  • B4: Science Tray

    A flat tray on the back for carrying a sample cup, a thermometer or a note; colour sensor optionally pointing up (ambient light).

    Wiring: Colour 3 (pointing up)

    Test: Example 03 (light survey).

    Step-by-step photos and instructions coming soon

  • B5: Phone Deck (expansion)

    A cradle on top of the brick holding a phone in landscape, camera facing forward, screen facing back; space for the ESP32 bridge and a small speaker.

    Wiring: ESP32 bridge to sensor port 1

    Test: Example 07 (phone bridge listener).

    Safety: phone strapped in two places; tilt the robot 20 degrees to check it doesn't tip.

    Step-by-step photos and instructions coming soon

Student designs

Add your own build to the library from the Robotics Studio: name, photo, wiring, measurements, and a test. Remixed builds credit the original designer.

Ready for the next step?Go to the Robotics Studio

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