Transistor switch not gate

162

02:27:30

Simple not gate for beginners 

published 5 years ago

Robert_Kidd

5 years ago

This is not a good example for beginners. In a real circuit the transistor would burn out straight away as the base emitter voltage is 5V and base current several amps.

Robert_Kidd

5 years ago

In addition, when you open the switch the transistor base is left floating.

Robert_Kidd

5 years ago

One solution, add a 100k pull down resistor directly from base to ground. Add a 10k resistor in series with the base to limit base current.

yasar589

5 years ago

Thank you brother

Robert_Kidd

5 years ago

You’re welcome. At least by adding the 2k resistor you’ve reduced the base current substantially.

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