- #1
cyeokpeng
- 69
- 0
Hi,
I know how to drive a transistor as a switch, but I am not very sure how to perform voltage and current calculation and analysis at the collector to emitter side. Basically what I know is that if the base is biased at 0.7 V, the transistor will be switched ON and current will flow through from the collector to the emitter. However, if I m not wrong, the current is not a constant here and is controlled by the choice of the resistor used. But does that mean that the collector-emitter junction effectively act as a short circuit here now?
The document I have uploaded is a simple circuit of a switch. My question is, how do we determine the collector current through the LED?
How does the LED light output performance going to be affected by the current flowing through it?
Thanks
I know how to drive a transistor as a switch, but I am not very sure how to perform voltage and current calculation and analysis at the collector to emitter side. Basically what I know is that if the base is biased at 0.7 V, the transistor will be switched ON and current will flow through from the collector to the emitter. However, if I m not wrong, the current is not a constant here and is controlled by the choice of the resistor used. But does that mean that the collector-emitter junction effectively act as a short circuit here now?
The document I have uploaded is a simple circuit of a switch. My question is, how do we determine the collector current through the LED?
How does the LED light output performance going to be affected by the current flowing through it?
Thanks