in consumer electronics declined in the 1990s, with rotary encoders, up/down push-buttons, and other digital controls now more common. Before digital electronics became the norm such a component was used to hookup in Overland Park allow radio and television receivers and other equipment to be switched on at minimum volume with an audible click, then the volume increased, by turning a knob. Disconnecting those two edges, and applying voltage to the other two, formerly unconnected, provides the other coordinate.
Well cover several different examples in this hookup guide, all built from the same basic parts. If you use regular potentiometer they will loose calibration after a while. All hooked up to a POKeys IO board.
The potentiometer can be used as a voltage divider to obtain a manually adjustable output voltage at the slider (wiper) from a fixed input voltage applied across the two ends of the potentiometer. In many disciplines where amplitude is important, it is often expressed in decibels (known as dB for short). For single-turn potentiometers, this wiper typically travels just under one revolution around the contact. The higher the percentage, the steeper the log curve. The two resistive tracks overlap at approximately 50 of the potentiometer rotation; this gives a stepwise logarithmic taper. The blue and yellow cells calculate the resistance from the wiper (w terminal) to each end contact (ccw is counterclockwise end, cw is clockwise). In This Tutorial, well start by examining what a potentiometer is, and a couple of common circuits built from them. In principle any relationship is possible, but for most purposes linear or logarithmic (aka "audio taper potentiometers are sufficient. Weve got a couple of examples that illustrate applications where this board is more useful than a regular, continuous potentiometer. Well then proceed to build a couple of example projects: one using a microcontroller, and another using the board in an analog demonstration.