Mostly about semiconductors:

1: Potentiometers
2: Relays
3: Inductive vs resistive loads.
4: What is a semiconductor?
5: Diodes.
6: Zener Diodes.
7: Diode examples.
8: Transistor basics.
9: Bipolar vs FET.
10: NPN vs PNP.
11: Transistor as switch.
12: Transistor as current source.
13: Voltage divider.

 

 

 

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