What is a potentiometer.
Potentiometer diagram. One button is for up or increasing the resistance and the other for down i e. Wiring illustration for using a potentiometer as a rheostat. Draw a schematic diagram showing a potentiometer being used as a simple variable resistor for varying current to a light bulb.
Two terminals the blue and green are connected to a resistive element and the third terminal the black one is connected to an adjustable wiper. The diagram shows the parts present inside a potentiometer. If it helps think of a potentiometer as a dimmer switch.
A potentiometer is almost always used to throttle an input signal so that it can be adjusted. The voltage supply is connected across terminals 1 and 3 positive lead to terminal one while negative lead to terminal three. In the circuit diagram shown below the terminals of the potentiometer are marked 1 2 and 3.
The ground is all the way off terminal 2 is the switch itself and terminal 3 is the switch turned all the way up. Instructions for potentiometer wiring. The circuit requires a 10k pot.
Also designate which way the wiper should be moved to make the bulb glow brighter. As the symbol suggests a potentiometer is nothing but a resistor with one variable end. But while the resistance value of a resistor stays the same you can change the resistance value of a potentiometer by turning it s shaft.
A little later we shall look at the many ways a standard pot may be wired as well as some further. A potentiometer has 3 pins. Potentiometers are also called pots for short.
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