1. ECE 431 Radio Enclosure Design Project Vladimir Goncharoff

2. Introduction ECE 431 – Analog Communication Circuits (RF Circuit Design)

3. Laboratory Project: AM Broadcast Band Receiver (500-1700 KHz) AM Broadcast Band Receiver (500-1700 KHz) Manual and Digital Tuning Manual and Digital Tuning Every student builds a radio Every student builds a radio Prototyping-style construction method Prototyping-style construction method

5. Manhattan-style construction:

6. Design Problem: There is too little space on the existing copper-clad board to allow for expansion and experimentation

7. Solution Approach: Redesign the radio enclosure to accommodate a larger circuit board (or boards)

8. Research Identify needs and wants Identify needs and wants Survey prospective customers Survey prospective customers Study existing designs Study existing designs Brainstorm design alternatives Brainstorm design alternatives

9. Desired Enclosure Features Increased circuit board area than the existing design Easy to manufacture Low materials cost Helps with constructing and testing the radio circuits Low EMI with the outside world Low EMI between different sections of the radio Aesthetically pleasing appearance Sturdy

10. Existing Radio Enclosure Design

11. Possible Improved Enclosure Designs Cross-Section Sketches

12. Design Alternative #1 6” x 12” single- sided board

13. Design Alternative #2 5” x 6” double-sided board

14. Design Alternative #3 Two 5” x 6” single- sided boards

15. Design Alternative #4 Two 5” x 6” single- sided boards

16. Design Decision Matrix CriterionWeighting Factor Design #1 Rating Design #2 Rating Design #3 Rating Design #4 Rating a91058 b74 ($5.00) 10 ($2.45) 8 ($3.20) 8 ($3.20) c35 (130 in 2 ) 6 (110 in 2 ) 8 (80 in 2 ) 10 (50 in 2 ) d10 (+18 in 2 ) 5 (+8 in 2 ) 5 (+8 in 2 ) 5 (+8 in 2 ) e810379 f3758 g58 6 h8 379 i85 77 j68 74 Weighted Sum: 542436486510

17. Design Alternative #1 is “best”

18. 3-D Models of the Final Design

20. Dimensioned Drawings: Assembly View

21. Exploded Assembly View with Parts List

22. Dimensioned Individual Part Drawings

23. Assembly Instructions Putting together the 9x12 enclosure v2.wmv Assembly Instructions Putting together the 9x12 enclosure v2.wmv Putting together the 9x12 enclosure v2.wmv Putting together the 9x12 enclosure v2.wmv

24. the end