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Definition of "Control Knob" |
A control knob is a rotary control used to provide input to a device when grasped by an operator and turned, so that the degree of rotation corresponds to the desired input. Such knobs are one of the most common components in control systems and are found on all sorts of devices. / Manufacturers make overtone crystal tuned to put the 3rd, 5th, or 7th overtone at the desired frequency, because they are thicker and therefore easier to manufacture than a fundamental crystal that would produce the same frequency,although exciting the desired overtone frequency requires a slightly more complicated oscillator circuit. |
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