1. PRACTICAL ELECTRONICS
MASTERCLASS
(Mr Bell)

2. WEEK 4 - LESSON PLAN
Re-Cap soldering safety and procedure (from Week 3)
Demonstrate safe soldering working practice
Practice soldering exercise with wire and nails
Model Money £3.50(S3) and £5(S5/6)
COMPLETE LOG BOOK
Extension:-
Finish your design of initials on the strip board
Finish safety poster
Read ‘How it works’ magazines (technology section)

3. Practice soldering exercise 2
The top 2 solder joints are examples of poor soldering. The ball of solder on the right is an example of a cold solder joint. This is because the wires weren't heated up enough to allow the solder to flow into the joint. The one on the left is another example of a cold joint that also had too much solder applied. The lower two solder joints are examples of good solder joints that were properly heated prior to applying the solder and with just the right amount of solder used to make the joint