Hi,
I'm teaching myself electronics and am working through a book called "Make: Electronics". I'm a total beginner on this subject and am just starting to learn about transistors.
In a chapter on transistor switching it says, "...initially you just need to know that in this type of transistor [2N2222], the collector receives current, the base controls it, and the emitter sends it out."
On my breadboard, which is following the circuit diagram in the book, the 2N2222 is wired up so that the collector is connected to the more positive side of a series circuit, and the emitter the more negative side.
I was wondering why this was, because I was thinking that if the collector's role is to take in current and the emitter's role is to output it, then the collector should be wired to the more negative side and the emitter more positive. This because of direction of current flow, negative to positive. My LED is wired in like this, for example.
Can someone please tell me in very basic terms why this isn't so?
Tom
I'm teaching myself electronics and am working through a book called "Make: Electronics". I'm a total beginner on this subject and am just starting to learn about transistors.
In a chapter on transistor switching it says, "...initially you just need to know that in this type of transistor [2N2222], the collector receives current, the base controls it, and the emitter sends it out."
On my breadboard, which is following the circuit diagram in the book, the 2N2222 is wired up so that the collector is connected to the more positive side of a series circuit, and the emitter the more negative side.
I was wondering why this was, because I was thinking that if the collector's role is to take in current and the emitter's role is to output it, then the collector should be wired to the more negative side and the emitter more positive. This because of direction of current flow, negative to positive. My LED is wired in like this, for example.
Can someone please tell me in very basic terms why this isn't so?
Tom