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Topic:Kt Kingtonics Principle of Trimmer Potentiomerets
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Principle of Trimmer PotentiomeretsA fixed resistor with a mechanism to change resistance construct a trimmer potentiometers. The principle is with the changing of resistive element length according a wiper sliding, the resistance will be changed. Use this method, with same sectional area, the resistance can be changed relative to resistive element length, and products can be manufactured in low cost. R: Resistance [Ω] ρ: Resistivity [Ω/m] L: Resistive element length [m] S: Resistive element sectional area [m2] The position of contact point decide the length of resistive element. Resistance between No.1 and No.2 (R12) will become higher if contact point become closer to No.3.
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