Methods and apparatus for a variable resistor configured to compensate for non-linearities in a heating element circuit

A variable the resistor improved at least of the supplement part of a such as thin film heating element and equal heating element a non-linear the circuit. A controllable heater comprising a heating element, a coupling heating element potential source (e.g., adjusting AC power plug), and a coupling heating element and voltage source with changeable resistor. Variable resistor comprising a resistance fixing element (e.g., one or more thin-film resistors) already such as sliding rod and equal motion mechanism. Movable elements can be adjusting the position related contact point to has a fixing element resistance, so the variable resistor provided at least one part to the position non-linear resistance, and heating element comprises at least one part of the variable resistor's of linear consumed power. The pair of system of wherein the evaporation transmission device, and is convenient to the smell density with the environment of claims a linearer control.