theenggprojects wrote: ↑
Wed Dec 06, 2017 7:24 pm
If you are planning to work on 2n2222, then you must have a look at Introduction to 2n2222. I have shared detailed overview of how it works and have also shared its working Proteus Simulation.
I have looked at your page and I appreciate the effort yo put int it BUT!
The way you use the transistor is not the way I would recommend. I would go even further and say it is wrong.
You put the load in the emitter which requires your base voltage to be above the load.
The best way to use an NPN transistor is to put the load at the collector side which makes the load voltage
independent of the driving voltage. You must then add a resistor in the base.
Also you are driving a motor but you do NOT have a flyback diode. That can damage your circuit!
It is for that reason that I post here. Do NOT use that circuit. It may damage your PI!
Also statements as ". It is the most commonly used Negative-Positive-Negative (NPN) Bipolar Junction Transistor (BJT) available"
shows to me a worrying lack of experience.