Introduction

3D modeling is similar to drawing in the sense that you must have a plan before you start.

Challenge:Take a small sound and make it bigger

The challenge is to make a circuit where a sound is output and then to design an acoustic amplifier to enhance the signal.

Part List for circuit

• Coin cell battery
• Coin cell battery holder
• Momentary push button
• Small speaker
• UM66T

The UM66 IC is a sound generator. The IC is a CMOS LSI designed for using in door bell, telephone and toy applications. The IC is preprogrammed to generate certain frequencies. When powered, the melody generator is reset and melody begins from the first note.

Circuit:

Design Questions

• What kinds of shapes might amplify our signal?
  

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• What do most wind instruments have in common?
  

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If you are starting with a cone:

• what kind of cone should you design? Perhaps a wide cone, one that goes from small to large
• What should the thickness of the material be? Why?
  

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• How do you enclose the electronic components?
  

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• How can you attach the horn to the enclosure?
  
  Drawing by Joseph Weissgold
  

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• Where should the button be placed?
  

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Soldering

Build the circuit so that you have an idea of how large your enclosure will need to be:

Fusion 360

45 minutes to model, 2-3 hours to print

The Phonohorn

1. Create a new sketch:
   
2. Select the plane to work on:
   
3. You are going to produce this profile:
   
4. draw a vertical line 50mm long:
   
5. Draw a horizontal line 40mmlong at the top of the vertical line and 7mm long at the bottom of the vertical line:
   
6. Draw a line at the 60° angle that is 7mm long:
   
7. Draw a horizontal line 1mm from the angled line. Then draw a vertical line that is 2.2mm long:
   
8. From the top of the line draw a horizonatal line 2mm to theright:
   
9. Select spoline:
   
10. Draw a spline that connects the 40mm line with the 2 mm line:
    
11. Stop the sketch:
    
12. Select revolve:
    
13. Select the profile:
    
14. Set the 50 mm vertical line to be the axis :
    
15. Revolve 360°:
    
16. Select shell:
    
17. Select the tip face:
    
18. Select the bottom face:
    
19. Sett the wall thickness to 1.2mm:
    
20. Create a new sketch:
    
21. Select the face to set the plane:
    
22. Select center rectangle:
    
23. Draw a horizontal rectangle with a 2mm width and a length that extends past the circle:
    
24. Select center rectangle:
    
25. Draw a vertical rectangle with a 2mm width and a length that extends past the circle:
    
26. Select trim or type t and click on all the interior lines:
    
27. Stop the sketch:
    
28. Select extrude:
    
29. Extrude past the rim:
    
    
30. Create a new sketch:
    
31. Select the circle as the working plane:
    
32. Select center rectangle:
    
33. Create a rectangle large enough to enclose your circuit:
    
34. Select offset or type o and click on the circle:
    
35. Set the offset to .25mm:
    
36. Hide the body and stop the sketch:
    
37. Extrude the rectangle and the circle to creatab ox that will enclose the circuit:
    
38. Select draft:
    
39. Select a plane and a face and rotate:
    
40. Continue with draft and chamfer to create an interesting shape:
    
41. Add fillets:
    
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55. Create a new sketch:
    
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57. :
    
58. Set the offset to 1.3mm:
    
59. Create a new sketch:
    
60. Orbit around and select the bottom face:
    
61. Set the offset to 1.3mm:
    
62. Stop the sketch:
    
63. Select loft:
    
64. Select the bottom of the base:
    
65. Select the top of the base and click OK:
    
66. Select extrude or type e. Extrude the bottom of the copied box. Select create New Body:
    
67. Select Combine:
    
68. Click on the extrusion and the lofted body.Press OK:
    
69. Export your parts and print
70. Evaluate the modelon the platform and if you need to iterate on the design,delete the problematic part. Make adjustments in Fusion.Re-export.: