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The center terminal of a variable resister is called a wiper.
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How to measure variable resistor?
A variable resistor (potentiometer) usually has a wiper and it is generally in between two outer legs, when you measure one outer leg to the other outer leg, you will have the value of the potentiometer, say 5kohms, when you turn the adjustment knob/screw; the wiper will most to one side or the other, reducing the resistance of the center leg to the outer leg and increasing the resistance of center leg to the other leg. when the wiper is in the middle, you should have 1/2 the value of the potentiometer from the center leg to the outdide legs. |__2.5k__↓__2.5k___| |_1k_↓_____4k___|
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What is the name of A variable resistor with two terminals?
hi, the center terminal (attached to the wiper contact) tied to one of the ends????
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A trimmer resistor usually called a trim pot is a small variable resistor it is used in circuits to do preset it is trimmed with a trimmer screwdriver it is made up with a round fiber disc with a layer of carbon with a wiper that run on the carbon layer to change the resistance it always have 3 connecting pins where the center one is connected to the wiper and the other two to opposite ends of the carbon strip.
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How to measure variable resistor?
A variable resistor (potentiometer) usually has a wiper and it is generally in between two outer legs, when you measure one outer leg to the other outer leg, you will have the value of the potentiometer, say 5kohms, when you turn the adjustment knob/screw; the wiper will most to one side or the other, reducing the resistance of the center leg to the outer leg and increasing the resistance of center leg to the other leg. when the wiper is in the middle, you should have 1/2 the value of the potentiometer from the center leg to the outdide legs. |__2.5k__↓__2.5k___| |_1k_↓_____4k___|
What is the use of variable resistor in schmitt trigger?
AnswerMy thoughts are that it is used to set the trigger point where the trigger fires. That is to say, if the voltage exceeds the reference set point, the trigger will then fire.To independently control the upper threshold and the lower threshold, some Schmitt trigger gates have 2 variable resistors: * a voltage-divider potentiometer, where the center tap selects the "average threshold"* a feedback variable resistor, which adjusts the amount of hysteresis (the difference between the upper threshold and the lower threshold).
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