In the pa speakers, have to adjust the volume of the encoder, we research on the principle of volume encoder can have?
As we all know, adjustable encoder is a kind of adjustable electronic components, by an individual and a rotating or sliding system.
On the resistance of the bare body, with one or two movable metal press contact, contact position to determine the resistance between both sides and contact resistance.
When the resistance between two fixed contact, plus a voltage change by rotating or sliding system on contact resistance body position, turn the contact between the fixed contact and you can get a relationship with the moving contact position with a certain voltage.
Encoder is basically a slide rheostat, there are several kinds of style, commonly used in speaker volume volume encoder switch and laser power size adjustment.
This circuit has A positive and negative symmetric power supply, example: when the encoder center sliding contact C to encoder when A side OUT of voltage output for + 12 v, when the encoder center sliding contact C to encoder B OUT of voltage output for - end
Single power supply control voltage, output has 0 C
The adjusting range of V.
This is A kind of audio amplifier used for volume control connection when the encoder center sliding contact C to encoder when A volume is the largest, when the encoder center sliding contact C to B encoder when minimum volume, if C to B A poor contact occurs when the volume closed tightly.
Shanghai electronic 26 years, specializing in the production of adjustable encoder also give many brand audio manufacturers supply, specializing in the production of all kinds of power amplifier audio volume encoder, professional production experience, and strength of the factory has advanced production equipment and testing equipment, supply safe, looking for looking for electronic encoder manufacturers.