The Raspberry PI Potentiometer is a device that can be used to measure the position of a knob or slider. It consists of two parts, one part is the potentiometer and another part is the Arduino board. The potentiometer can be connected to an analog input pin on the Arduino board.
It is a device that can be used to measure the amount of electric current by measuring the voltage. It can be used in various projects such as controlling a motor, making a simple robot, or even adding it to your circuit design.
The Potentiometer has three pins: GND, VCC and AIN. The GND pin connects to ground on Arduino, whereas VCC connects to power supply and AIN connects to any analog input pin on Arduino.
The advantages of using Raspberry PI with potentiometers are:
The potentiometer can be used to measure voltage
The potentiometer can be used as an analog input device
Potentiometers are widely available and inexpensive
Potentiometers are typically linear devices, but they are also manufactured with logarithmic tapers. A logarithmic taper provides finer resolution at one end of its range and coarse resolution at the other end of its range.
Potentiometers are available with different shaft types:
A threaded shaft will have a knurled knob to allow rotation of the shaft by hand or with an adjusting tool;
A push-pull shaft will have two buttons or switches on either side of the pot to allow linear sliding motion;
A slide shaft will have two channels that can be slid along each other by turning the pot's knob (or sometimes by pushing the knob in a certain direction).
The slide shaft is the part of a slide pot that contains the actual slider (short for "sliding switch"). The sliders are often made from tungsten carbide. There will be one or more switches in series on the shaft, which can be either "normally open" or "normally closed." One type of normally closed switch is called a reed switch, and is used to turn dimmers on and off.
A supply or input voltage is provided across terminals A and B in a standard potentiometer circuit. Between terminals C and B or C and A, the output voltage is monitored. Figure 2: A potentiometer linked to an Arduino analog input pin in schematic form.
A three-terminal pot is essentially a voltage divider when used with three terminals. You increase one resistor in the voltage divider while decreasing the resistance in the other as you move the wiper. A variable voltage divider is a three-terminal pot.
The potentiometer is a three-wire resistive device that serves as a voltage divider, generating a constantly varying voltage output signal proportional to the wiper's actual position along the track.
It's a 10k potentiometer with a rotating knob and a single turn. Potentiometers are sometimes known as rotary potentiometers, or simply POT for short. By moving the knob on these three-terminal devices, you may change the resistance from 0 to 10k ohms.
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