Section outline

  • Activity – Design a Simple Sensor Holder

    In this activity, you will design a simple sensor holder in TinkerCAD. Sensor holders are essential parts of a robot as they secure components like ultrasonic sensors, IR sensors, or light detectors. This hands-on section will guide you through creating a basic yet practical holder for an ultrasonic sensor.

    • Step-by-Step Guide

      1. Measure Your Sensor
        For example, an HC-SR04 ultrasonic sensor typically has:
        • Mounting holes distance: ~41 mm
        • Hole diameter: ~3 mm
        • Overall sensor size: ~45 x 20 mm
      2. Create a Mounting Base
        Drag a box shape onto the workplane and set its dimensions to:
        • Width: 50 mm
        • Depth: 30 mm
        • Height: 5 mm
      3. Add Mounting Holes
        Use the cylinder tool to make two holes for the screws:
        • Diameter: 3 mm
        • Height: 6 mm
        • Position them 41 mm apart
        • Change them to 'Hole' and align with the base
      4. Design the Sensor Slot
        Use a box or combine multiple shapes to create a slot or cutout that matches the body of the sensor.
      5. Group the Design
        Select all parts and group them to finalize your sensor holder.

      Sample Dimensions Table

       

      Part Shape Dimensions (mm) Notes
      Base Plate Box 50 x 30 x 5 Main support for the sensor
      Mounting Hole Cylinder (Hole) 3 dia x 6 height Use 2, placed 41 mm apart
      Sensor Slot Custom (Box/Other) 45 x 10 x 15 Space for sensor body

      Tips

      • Use the “hole” feature in TinkerCAD for cutouts and screw spaces.
      • Group parts to avoid accidental movement.
      • Use the ruler tool to place holes accurately.

       

      This activity teaches you precision, alignment, and the importance of mechanical fit. In the next section, we will look at how 3D printing turns this design into a real-world part.