1. Soldering Building permanent circuits

2. Soldering accomplishes two things • Electrical connections • Mechanical connections

3. Tools you Need • Wire cutters • Wire strippers • Soldering iron • Solder

8. Optional Tools • Lead bender • Exacto knife

11. The Process • Form leads • Insert into PCB • Solder leads to pads • Trim excess leads

12. Forming Leads Some leads are ready to insert into the PCB Some leads need to be formed

13. Ready Formed Leads

14. Leads that Need to be Formed

17. Cutting from a Row

18. Stripping Wire Correct Gauge Pull Wire Wire Stripped of Insulation

19. Insert Components • Usually Flush • Bend Leads or Tape

21. Holding Component in Place Spread Leads Slightly Tape Down

22. Before You Solder Tin Tip Wipe Tip

23. Don’t Jab!

24. Soldering • Briefly heat pad and lead • Apply solder to pad, lead, and iron • Remove solder and iron (in that order)

25. Heat Pad and Lead

29. Headers

30. IC Sockets • Use IC sockets • Solder opposing IC socket pins • Confirm flush • Rework if necessary

31. Soldering Opposing Pins

32. Confirm Flush

33. Rework if Necessary

34. Strain Relief

35. Trim Excess Leads

36. And Beware of Flying Leads

37. What’s Next? Check Your Work!