Hello all,
This is my first time actually asking a question, but long time lurker. Basically, I don't understand how the attached circuit works. Or more specifically, why it works like it does. I don't understand why it lights up when the circuit is open, but turns off when the circuit is closed. What are the actual calculations that drive the transistor to send enough current through to light the LED when the switch is thrown?
The transistor in the picture is a 2N2222.
Thanks for any help!
This is my first time actually asking a question, but long time lurker. Basically, I don't understand how the attached circuit works. Or more specifically, why it works like it does. I don't understand why it lights up when the circuit is open, but turns off when the circuit is closed. What are the actual calculations that drive the transistor to send enough current through to light the LED when the switch is thrown?
The transistor in the picture is a 2N2222.
Thanks for any help!
Attachments
-
36.7 KB Views: 54