Coaxial potentiometer is a kind of potentiometer. It is to install the potentiometer with two identical specifications normally on same rotating shaft, when adjusting rotating shaft, the sliding contact of two potentiometers rotates synchronously. Double potentiometer, is to adjust the volume balance of 2 channels, this potentiometer is very special, when rotated in the middle position, one of the middle foot of the potentiometer on the left foot resistance is zero (emergency on the circuit board of the two feet with copper short circuit), And the intermediate foot of another potentiometer on the right foot resistance value is zero (emergency on the circuit board of the two feet with copper short circuit), this can only be replaced with the same potentiometer, no other potentiometer can be replaced, but the resistance value does not have to be 100 kOhm, between 20 and 100 kOhm can be used.
Potentiometer waveform spreads out by time axis can see, although pulse potentiometer left turn and right turn waveform are same. But when left-handed, in the first state, foot 1 becomes low level earlier than foot 2. In the second state, pin 2 also becomes low; In the third state, pin 1 becomes high level before pin 2. In the fourth state, pin 2 also becomes high; When the potentiometer pulse potentiometer turns right, the change rule of the output waveform of foot 1 and foot 2 is just opposite to that of left turn. Therefore, according to the time identification method (comparing the time difference between P1.0 and P1.1 low level appearing and ending), we can identify whether the pulse potentiometer is left or right. In dynamic scanning, it is difficult to measure the waveforms of P1.0 and P1.1 due to the influence of sampling frequency and operation speed. It is also difficult to accurately measure the time difference between P1.0 and P1.1 low level appearance and end, and only the level of P1.0 and P1.1 can be sampled quickly.
Coaxial potentiometer is a kind of potentiometer
The electric parameter of potentiometer choice
Logarithmic or index type potentiometer
Double coaxial potentiometer of stereo audio amplifier
The detection method of potentiometer