1. Soldering Building permanent circuits

2. Soldering accomplishes two things Electrical connections Mechanical connections

3. Tools you Need Wire cutters Wire strippers Soldering iron

7. Optional Tools Lead bender Exacto knife

10. Solder An alloy of 60% tin and 40% lead Low melting point Fuses metal together Rosin flux core Lead-free and silver solder

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

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

14. Ready Formed Leads

15. Leads that need to be Formed

18. Cutting from a Row

19. Stripping Wire Correct GaugePull Wire Wire Stripped of Insulation

20. Insert Components Usually Flush Bend Leads or Tape

22. Holding Component in Place Spread Leads SlightlyTape Down

23. Before You Solder Wipe Tip Tin Tip

24. Don’t Jab!

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

26. Heat Pad and Lead

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 Beware of flying leads

36. The lead is cut at the solder

37. What’s Next? Check Your Work!