Potentiometers and rheostats are variable resistors in which the wiper ... but handles more power. See resistor. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.
Moving the position of the slider on this resistor, changes the length of wire in the circuit which changes the resistance. A variable resistor is used in some dimmer switches and volume controls.
On that board he found a variable resistor combined with a capacitor which control a triac, actuating the speed of a drill. [Ben’s] solution works great and isolates the drill from the control ...