Produce Your Own PCB Board Jack Ou Engineering Science Sonoma State University

1. Produce Your Own PCB BoardJack OuEngineering ScienceSonoma State University

2. Add Components

3. Add NPN 2N3904 (Schematic Symbol) (Package)

4. Add Resistors • A standard ¼-watt resistor is a type 0207.

5. Add Resistors Vertically

6. Add a Capacitor

7. Add a Phoenix Connector

8. Initiate a Command Two-Step Process • Click on a command • Click on the component

9. Move • Use the Move button to alter any component’s location

10. Delete

11. Generate a Mirror Image (Generate a mirror Image)

12. Edit a Component’s Value

13. Making Connections (Use Net command to make connections)

14. Display Net Name

15. To Start a New Board File

16. Board Editor If you keep both windows open, changes made on the schematic window will be reflected in the layout window.

17. Turn on the Grid

18. Rearrange the Comopnents (Right-Click to rotate a component) (The smaller the board, the more economical)

19. Click on Route to Start Wiring Up the Circuit (Left click to select air wire to route)

20. Routing Menu (Width of a wire) (Two Metal Layers) You should select the width of the wire to be 0.04 inches (40 mils) or greater.

21. Jumpers • You will need to use physical wires as jumpers in places where you can’t route across existing copper trace.

22. Add Vias • Add Vias • Drill 0.03149 (Assumptions: 1. drill bit is approximately 31 mils in diameter 2. wire size is 29 mils) • Diameter 0.056 (56 mils)

23. Provide Connection Via Jumper (Right click to bend the wire by 45 degrees)

24. A Sample Layout

25. Display only the necessary Metal Layers

26. Print Only Necessary Metal Layers (Show Bottom trace, pads, and via)

27. Print the Layout to a Transparency

28. Run the transparency through the laser printer twice to produce better transfer

29. Cut the Transparency

30. PCB Development • With contribution from Kevin Zack

31. Cut the PCB Board

32. Clean the PCB with a scotch pad or fine sandpaper

33. When the board is shiny, use acetone to remove any oil or grease on the board

34. Transfer Image • Run the transparency through the laser printer twice to produce better transfer. • Tape the printed transparency on to the a cleaned PCB board. • Heat a hobby iron. With light pressure, iron the transparency onto the copper. • After the board has cooled, peel off the transparency. • Use Sharpie to complete image transfer

35. Tape the printed transparency on to the a cleaned PCB board

36. Heat a hobby iron. With light pressure, iron the transparency onto the copper Use highest Setting-- 3

37. After the board has cooled, peel off the transparency.

38. Failed Image Transfer

39. Use Sharpie to Repair PCB Board

40. Precaution • Etching Solution may leave stain on skin and utensils. The use of rubber gloves is recommended. • Avoid prolonged or repeated breathing of vapor or contact with skin.

41. Develop PCB • Ferric Chloride is used to remove the copper not protected by the toner. • Place the printed board into a container with a lid and pour about ¼” of the acid solution over the board. • Secure the lid and using a swirling motion, agitate the solution for 15 minutes to 30 minutes until the unwanted copper is removed. • After the excess copper is removed, pour water over the board to halt the etching process. 5. Dispose the left over chemical properly. (Include the chemical rinsed off with water)

42. Ferric Chloride

43. Place the printed board into a container with a lid and pour about ¼” of the acid solution over the board

44. Agitate the solution

45. Dispose Chemical Properly

46. Post Processing • Clean off the toner protecting the traces with a scotch pad or sandpaper. • Clean off any residue with acetone. • Drill the board with a drill press. (Use 31 mil drill bit)

47. Remove Ink (Before) (After)

48. Drill Holes