Re: Transistor Biasing
Transistor can be thought like a water tap.
saturation is like turn on the tap knob to it's maximum.
You might be able to turn the knob more,
but the water that is coming out of the tap is the maximum,
or the tap is in saturation condition.
The transistor you are using seems to act like a switch.
Using transistor to driven the LED display.
It is easy to use the transistor as a switch (driving it to saturation),
instead of worrying about the details about the gain.
You might want to adjust the brightness of your LED,
by adjusting the gain.
I find it easiler to use a PWM control circuit to adjust the brightness.
Less computation to wok out.
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