Building a transistor switch

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Other lessons in this sub-strand

1. The transistor
2. The bipolar junction transistor
3. NPN and PNP structure
4. Base, collector and emitter
5. Transistor circuit symbols
6. Biasing the two junctions
7. Current gain (beta)
8. Cut-off, active and saturation
9. The transistor as a switch
10. The transistor as an amplifier
11. Voltage-current characteristics
12. Selecting a transistor
13. Testing a transistor
14. Building a transistor switch
15. Building a simple amplifier
16. Why transistors matter