Potentiometer is used for variable resistor divider. In the bare resistance body, pressed with one or two movable metal contact. Contact position determining resistance body and contacts at either end of the resistance between the. According to material distribution around, carbon membrane, solid potentiometer; according to the output and input voltage ratio and rotation angle relation of linear potentiometer (linear), function potentiometer (a curve). The main parameters for the resistance, tolerance, rated power. Widely used in electronic equipment, instrumentation, control volume in the sound and the receiver.

When a voltage is applied between the two fixed contact resistance body, by rotating or sliding system change in contact resistance body position, the moving contact and the fixed contact can be a movable contact position with a certain relationship of voltage.

It is mostly used as a voltage divider, the potentiometer is a three terminal element. The potentiometer is basically a sliding rheostat, there are several styles, generally with the regulation in the size box volume switch and the first laser power

Potentiometer structure classification

Large structure can be divided into two categories: rotary potentiometers, linear sliding potentiometer

Don't switch with ordinary potentiometer: for general potential regulation.

With a switch potentiometer for ordinary: Radio, instrument, and other common household appliances

Trimmer potentiometer / half variable potentiometer: used in electronic equipment, household appliances, instruments and meters do internal control potential.

Linear sliding potentiometer: This is a strip-shaped vision more intuitive. The Walkman, audio using the more common.

Multiturn potentiometer / precision potentiometer: internal cable around the ring, made of glass glaze materials, and more generally for ten laps, mainly used in instruments and meters, electronic equipment, precision adjustment.

Duplex potentiometer: with a two resistor substrate into sync potentiometer, such as audio, if you use two common potentiometer to adjust the volume that is a very troublesome thing, adjust the volume using the duplex potentiometer is very convenient.

Multiple potentiometer: is a sync potentiometer, can be made into any number of potentiometer, in audio, electronic equipment has many applications, to achieve synchronization adjustment.

Sliding rheostat potentiometer: is commonly used in laboratory, the potentiometer of large volume, high power, sliding visual, can also limit the use of current transformer.

Wirewound potentiometer: resistance wire wound potentiometer by resistance wire wound around the insulating material, there are many types of resistance wire: General wirewound resistors, precision wirewound resistors, high power wirewound resistors, high-frequency wire-wound resistor. The resistance wire material is according to accommodate potentiometer structure, the resistance wire, the resistance value and space. Temperature coefficient to choose. The resistance wire is fine, in a given space more larger resistance value and the resolution. But the resistance wire is too thin, in use process is easily broken, affect the service life of the sensor. Widely used in electronic equipment, electric welding machine, electric motor, etc..

Potentiometer:

Circuit with symmetrical power, cases: when the center contact sliding potentiometer potentiometer C to A end OUT the output to ground voltage is +12V, when the center contact sliding into the potentiometer potentiometer C B end OUT output voltage to ground for the -12V.

Potentiometer is an adjustable electronic components. It is composed of a resistor and a rotating or sliding system. When a voltage is applied between the two fixed contact resistance body, by rotating or sliding system change in contact resistance body position, the moving contact and the fixed contact can be a movable contact position with a certain relationship of voltage.