1. Soldering Safety – Soldering Irons are very HOT! Name: 1. When I am not using the soldering iron, I should return it to the holder because________ _________________________ _________________________ 2 I will put a heat mat under the area I am working on because __________________ _________________________ _________________________ 3. Good ventilation is important when soldering because _____ _________________________ _________________________ 4. Only one person should solder at a time and they should concentrate well so that _________________________ _________________________ _________________________ _________________________ 5. I will not touch the soldering iron to see if it is on. Instead, I will ______________________ _________________________ _________________________ 6. I wear an apron when soldering so that ___________ _________________________ _________________________ _________________________ 7. I will clean the iron between each join to make sure ______ _________________________ _________________________ 8. I can use a crocodile clip between the board and my component to ______________ _________________________ _________________________ 9. I can snip the excess wires off with wire clips once I am finished because___________ _________________________ _________________________ You have 5 minutes to discuss the answers with your table. Draw a soldering iron below:

2. Lesson Objectives: To learn how to solder safely and effectively. Success Criteria Must: Have filled in your table of resistor values and added the first six resistors to your board, bending the wires over so that they don’t fall off. Should: Have soldered the six resistors in place safely and accurately. Could: Have completed the soldering task and the soldering safety homework sheet (NEATLY!). SOLDERING IRONS ARE DANGEROUS - ANYONE CAUGHT ACTING STUPIDLY WITH EQUIPMENT WILL AUTOMATICALLY BE GIVEN AN AFTER SCHOOL DETENTION

3. Homework: Complete the soldering safety sheet. For next lesson. Marks will be given for the quality of your answers and for neatness!

4. SOLDERING a step by step guide.

5. ADD YOUR COMPONENT (example shown is a resistor) by pushing the wires through the holes you have drilled in your PCB.

6. Bend over all of the wires you’re not going to solder now.

7. CLEAN THE POINT OF THE IRON - take away any dirt on a damp (not soaking wet) sponge when the iron is heated up. This will help your solder to flow properly.

8. ”TIN” THE IRON. This just means you should melt a tiny bit of solder onto the point. Try to avoid breathing in the fumes - they can be harmful.

9. HEAT YOUR COPPER TRACK by holding the iron’s point on it for 3 seconds. If you heat it for too long, the track will burn away. If you don’t heat it for long enough, the solder will not stick.

10. TOUCH THE SOLDER WIRE ONTO THE TRACK and heat it quickly from above with the iron.

11. LIQUIFY JUST ENOUGH SOLDER TO MAKE THE JOIN and then pull the iron away. Your join should look something like this one. You should only need a small amount of solder for each join.

12. GOOD AND BAD ATTEMPTS GOOD: The join is complete and will hold in place. BAD: Not enough solder applied. No join.

13. GOOD AND BAD ATTEMPTS BAD: Copper track not heated long enough. No join. BAD: Copper track burned so no current can pass through. No join.

14. GETTING YOUR RESISTORS IN THE RIGHT ORDER Bear in mind – this PCB is shown from the BACK. Use these colour codes to fill the values on your sheet. violet grey

15. Lesson Objectives: To learn how to solder safely and effectively. Success Criteria Must: Have filled in your table of resistor values and added the first six resistors to your board, bending the wires over so that they don’t fall off. Should: Have soldered the six resistors in place safely and accurately. Could: Have completed the soldering task and the soldering safety homework sheet (NEATLY!).

16. ELECTRONIC ORGAN RESISTOR CODES R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 VALUENo. red brown blue orange violet black grey green

17. ELECTRONIC ORGAN RESISTOR CODES R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 VALUENo.

18. ELECTRONIC ORGAN RESISTOR CODES R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 27K VALUENo. 22K 10K 18K 15K 6.8K 12K 10K 82K