Knob on display (KoD) devices and related systems, methods, and devices are disclosed. A KoD device includes at least one electrode including an electrically conductive material. The KoD device also includes a base assembly configured to be positioned between a touch screen of a touch screen device and the at least one electrode. The at least one electrode is configured to be positioned in engagement proximity to a touch sensor of the touch screen device through the base assembly.

A spring configured to be fixed to a housing and nested within a dial that is rotatable about the spring. The dial has a plurality of spaced apart inwardly facing teeth that are adjacent the spring. The spring is configured to facilitate rotation of the dial about the spring. The spring includes a central body having at least one anchor configured to connect the spring to the housing. The spring also includes at least one arm having a first end connected to the central body. The spring also includes a second end of the arm that is connected to a bulb. The bulb can be enclosed and include an exterior surface with a node that is on distal from the central body. The node is sized to fit in a space between adjacent teeth. The enclosed bulb biases the node toward the spaces between the teeth.