# Tinkercad Design: 3D Printed Whistle

### Objectives and Overview

Use this tutorial to create your own whistle with this tutorial in less than 1 hour. The original lesson can be found on Instructables

#### Step 1: Create a Cylinder

Create a cylinder of 20 mm diameter x 7.5 mm height.

#### Step 2: Create a Hollow Cylinder

Create a hollow cylinder of 17 mm diameter x 8.5 mm height. Height does not matter, but the diameter will give you a 3 mm wall. It is important to lift 1.5 mm from the workplane.

#### Step 3: Align and Group

Align both cylinders on the X axis and on the Y axis. Not on the Z axis. Group it.

#### Step 4: Create a Rectangle

Make a rectangle of 24 x 7 x 7.5 mm.

#### Step 5: Align Rectangle and Cylinder

Align the cube with the cylinder, on the Y axis.

#### Step 6: Put the Prism Tangent to Cylinder

Move the prism with the arrows on the keyboard and put tangent to the cylinder.

#### Step 8: Group Cylinder

Group cylinder, hollow cylinder and prism.

#### Step 9: Create a hole shape

Create a hollow cube of dimensions 24 x 7.5 x 2 mm. Raise it 3.75mm from the workplane.

#### Step 10: Place the Hollow Prism

Align hollow prism tangent with whistle. It may be necessary to adjust the grid to 0.1mm.

#### Step 13: Rotate Hollow Prism

Rotate -22.5º the hollow prism you have doubled before.

#### Step 14: Place the Rotated Hollow Prism

Put that hollow prism tangent to the hollow interior of the whistle. It may be necessary to adjust the grid to 0.1mm.

#### Step 15: Create another Hollow Prism

Create a hollow prism of 24 x 3 x 7.5 mm, raised 3.75mm from the workplane.

#### Step 16: Place New Prism & Group

Group all and you have one half of the whistle.

#### Step 17: Duplicate it

Duplicate it to get the other half of the whistle.

#### Step 18: Invert the Half

Invert the duplicated half using the Mirror tool or by pressing ‘M’ key.

#### Step 21: Raise the Upper Half

Mount one half on the other by raising it 7.5 mm and group it.

#### Step 23: Group It

Step 22 Group it

Step 23 Create a Keyring

Create a 12x12x mm toroid raised 1.5mm from the workplane

Step 24 Align Toroid and Whistle

Align the toroid with the whistle on the Y axis and on the Z axis. Not on the X axis.

Step 25 Cut the Toroid

Remove half of the toroid you do not want with a hollow cube.

Step 26 Place Toroid in Whistle

Place that half of the toroid to the body of the whistle. Check that nothing protrudes from the toroid inside.

Step 27 Group It

Step 28 Whistle Insert

You can print a small ball or use a small chickpea

Print this with support material: https://learn-dhf-website.s3.amazonaws.com/Whistleball.stl

Print the whistle half-way > Pause Print and place the ball inside> Continue Printing