How much do you know about the triode's switching function? A few pictures are enough to see

A good understanding of the triode's switching function, the following eight examples of pictures, vividly explain the function of the triode as a switch. I look forward to your reply to discuss and analyze each circuit. 1, low side switch

2, high side switch

3, the base resistance

4, non-gate circuit

5, and the door

6, or the door

7, H bridge

8, the oscillator