adjustable resistor การใช้

• The basic sensitivity of a meter might be, for instance, 100 resistance by placing it in series with a known voltage ( a battery ) and an adjustable resistor.
• A re-amping device commonly employs a reversed Direct Inject ( DI ) transformer with some resistors added for level and impedance shift . Level and impedance adjustment can be achieved by adding a potentiometer or adjustable resistor.