bft transceiver.How does a multi-potentiometer sensor work

　　A multipotentiometer is a noun that indicates the voltage at a point in a selection relative to a reference point. It is often used as a voltage divider to change the potential at a point in a circuit.

　　Multiple potentiometers are variable resistors for voltage division. On the exposed resistor body, one or two movable metal contacts are pressed tightly. Contact position Determines the resistance value between either end of the resistor and the contact. According to the material, it is divided into wire wound, carbon film, solid core type multi-coupling potentiometer; According to the relation between the output and input voltage ratio and the rotation Angle, the linear multi-potentiometer (linear relation) and the functional multi-potentiometer (curvy relation) are divided. The main parameters are resistance, tolerance and rated working principle power. It is widely used in electronic equipment as volume control in audio and receivers.

　　The nominal resistance value of a multipotentiometer is the resistance value between the two fixed ends. It is also according to the nominal series value of the resistance,

　　Usually according to E6, or E12 series nominal value.

　　E6: Divided into 6 values: 1.0 1.5 2.2 3.3 4.7 6.8 ±20%

　　E12: Divided into 12 values: 1.0 1.2 1.5 1.8 2.2 2.7 3.3 3.9 4.7 5.6 6.8 8.2 ±10%

　　Its units are mostly multiplied by the above numbers: 10Ω, 100Ω, KΩ, 10KΩ, 100KΩ, MΩ

　　In the series circuit, the movement of the working principle of the sliding rheostat slide plate causes a series of changes in the circuit. When the slide P moves, the resistance of the sliding rheostat connected to the circuit changes, and the total resistance in the circuit changes, according to Ohm's law: I = U/R, the power supply voltage is unchanged, and the electric strength changes due to the change of resistance. When analyzing voltage distribution, some students mistakenly believe that because the resistance value of the fixed resistance resistance is unchanged, the voltage at both ends of the fixed resistance is unchanged. In fact, in a series circuit, a change in the resistance value of a resistor will cause a change in the voltage distribution at both ends of each electrical appliance in the entire circuit. The voltage change at both ends of the fixed resistance can be analyzed first, that is, U fixed = I·R fixed, and then the voltage change at both ends of the sliding rheostat can be determined according to the working principle of constant power supply voltage U = U fixed +U slip. In a parallel circuit, the movement of the sliding rheostatic slide in the open or closed branch of the switch or the parallel branch only affects the change of the resistance of the branch, and does not affect the change of the resistance in the other branch and the change of the power supply voltage

　　When a voltage is applied between two fixed shocks of the resistance body, the position of the contact on the resistance body is changed by rotating or sliding system, and a voltage that is in a certain relationship with the position of the moving contact can be obtained between the moving contact and the fixed contact. It is mostly used as a voltage divider operating principle, which is a multiplex potentiometer is a four-terminal element. Multi-potentiometer is basically a sliding rheostat, there are several styles, generally used in the sound box volume switch and laser head power size adjustment Multi-potentiometer is an adjustable electronic component.

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