A control knob works by turning a shaft which connects to the component which produces the actual input. Common control components used include potentiometers, variable capacitors, and rotary switches. An example where the knob does not produce a variation in an electrical signal may be found in many toasters, where the darkness knob moves the thermostat in such a way as to change the temperature at which it opens and releases the cooked toast. Some similar controls produce similar inputs using different geometry; for example, the knob may be replaced by a lever which is moved through an angle. Another example is the sliding controls which frequently replace knobs as level controls in audio equipment.
Feedback
The use of knobs is an important aspect of the design of user interfaces in these devices. Particular attention needs to be paid to the feedback to the operator from the adjustments being made. The use of a pointer on the knob in conjunction with a scale assists in producing repeatable settings; in other cases there may be a dial or other indicator which is either mechanically linked the knob's rotation (as in many older radio tuners) or which reports the behavior being controlled.
Examples
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various knobs, three of which incorporate pointers to indicate setting
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the knob on the left turns the shaft of a potentiometer
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a control panel with knobs color-coded according to function
control, knob, this, article, uses, bare, urls, which, uninformative, vulnerable, link, please, consider, converting, them, full, citations, ensure, article, remains, verifiable, maintains, consistent, citation, style, several, templates, tools, available, ass. This article uses bare URLs which are uninformative and vulnerable to link rot Please consider converting them to full citations to ensure the article remains verifiable and maintains a consistent citation style Several templates and tools are available to assist in formatting such as Reflinks documentation reFill documentation and Citation bot documentation August 2022 Learn how and when to remove this template message This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Control knob news newspapers books scholar JSTOR January 2017 Learn how and when to remove this template message A control knob is a rotary device used to provide manual input adjustments to a mechanical electrical system when grasped and turned by a human operator so that differing extent of knob rotation corresponds to different desired input Control knobs are a simpler type of input hardware and one of the most common components in control systems and are found on all sorts of devices from taps and gas stoves to optical microscopes potentiometers radio tuners and digital cameras as well as in aircraft cockpits 1 Two control knobs for a heating cooling system The left knob controls the temperature while the right controls the fan speed Contents 1 Operation 2 Feedback 3 Examples 4 ReferencesOperation EditA control knob works by turning a shaft which connects to the component which produces the actual input Common control components used include potentiometers variable capacitors and rotary switches An example where the knob does not produce a variation in an electrical signal may be found in many toasters where the darkness knob moves the thermostat in such a way as to change the temperature at which it opens and releases the cooked toast Some similar controls produce similar inputs using different geometry for example the knob may be replaced by a lever which is moved through an angle Another example is the sliding controls which frequently replace knobs as level controls in audio equipment Feedback EditThe use of knobs is an important aspect of the design of user interfaces in these devices Particular attention needs to be paid to the feedback to the operator from the adjustments being made The use of a pointer on the knob in conjunction with a scale assists in producing repeatable settings in other cases there may be a dial or other indicator which is either mechanically linked the knob s rotation as in many older radio tuners or which reports the behavior being controlled Examples Edit various knobs three of which incorporate pointers to indicate setting the knob on the left turns the shaft of a potentiometer a control panel with knobs color coded according to function digital camera lens with two control knobsReferences Edit https www amazon com b node 16412811 Retrieved from https en wikipedia org w index php title Control knob amp oldid 1104310757, wikipedia, wiki, book, books, library,
