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Bias is everywhere. It means different things in different technologies. It just means some adjustment of circuit parameters to set a stable point of reference for the system.
If you are using a jump rope, you hold the ends in your hand and swing it over your head then under your feet. If you hold the ends too high, the rope will not reach under your feet. (and might hit the ceiling) And if you hold the handles too low, the rope won't go over your head. So you hold them half way up your body so the rope passes over both head and feet. I have biased the rope handles to a point that allowed me room both directions to work.
In your car, the engine idles when you are not moving. If you set the idle speed too low, the engine will stall out or stop running. If you set it too fast, the engine will get hotter and waste gas. So the optimal speed is 700 RPM or whatever. That too is a form of bias.
In a solid state [power amp, we usually have two opposing power supplies, and the output transistors take turns switching on and off to drive the output positive then negative. If one side turns on before the other side turns off, excess current flows from one supply to the other through them - the amp runs hot. If one side turns off, but the other side doesn't turn on right away, there is "crossover distortion" - the output does not cross over from positive to negative, or vice versa, smoothly. The bias in the amp sets the point where the two sides hand off.
If your pilot light jewel is blue, use a blue LED instead of red.
If you are using a jump rope, you hold the ends in your hand and swing it over your head then under your feet. If you hold the ends too high, the rope will not reach under your feet. (and might hit the ceiling) And if you hold the handles too low, the rope won't go over your head. So you hold them half way up your body so the rope passes over both head and feet. I have biased the rope handles to a point that allowed me room both directions to work.
In your car, the engine idles when you are not moving. If you set the idle speed too low, the engine will stall out or stop running. If you set it too fast, the engine will get hotter and waste gas. So the optimal speed is 700 RPM or whatever. That too is a form of bias.
In a solid state [power amp, we usually have two opposing power supplies, and the output transistors take turns switching on and off to drive the output positive then negative. If one side turns on before the other side turns off, excess current flows from one supply to the other through them - the amp runs hot. If one side turns off, but the other side doesn't turn on right away, there is "crossover distortion" - the output does not cross over from positive to negative, or vice versa, smoothly. The bias in the amp sets the point where the two sides hand off.
If your pilot light jewel is blue, use a blue LED instead of red.
2.2K is close enough and a standard value. The extra 220 ohm (extra 10%) left in will barely matter.
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