Electronics: Switches, Conductivity & Light Bulbs
Electronics: Switches, Conductivity & Light Bulbs Days: 2 Mode: Pairs Take-home: Working switch/conductivity circuit
Teaching & key ideas
Key concepts: Closed/open circuits, switches, conductors/insulators, loads, troubleshooting.
Hook: Use a simple tester to make a bulb/LED turn on through unexpected objects.
Test / evidence: Students build a reliable switch circuit and test/classify several materials.
Variables to change: Switch type; tested material; number of loads.
Lesson flow
Lesson plan:
Day 1: Build switch circuit → troubleshoot
Day 2: Convert circuit to conductivity tester → test/classify materials → design a useful switch
Safety / cleanup:
Low-voltage only; teacher checks for short circuits; batteries disconnected during storage.