# Decade box

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{{short description|Electronic test equipment}}
[[File:Odporová dekáda KURBELWIDERSTAND (A).jpg|thumb|A resistance decade box, made in [East Germany](/source/East_Germany)]]

A '''decade box''' is a piece of [test equipment](/source/Electronic_test_equipment) that can be used during prototyping of [electronic circuit](/source/electronic_circuit)s to substitute the interchanging of different values of certain [passive components](/source/Passivity_(engineering)) with a single variable output.<ref name="Dictionary">{{Cite web|title=Dictionary and Thesaurus {{!}} Merriam-Webster|url=https://www.merriam-webster.com/dictionary/decade%20box|access-date=2016-05-22|website=[Merriam-Webster](/source/Merriam-Webster)}}</ref><ref>{{Cite book|title=Modern Dictionary of Electronics|last=Graf|first=Rudolf F.|publisher=Howard W. Sams & Co., Inc.|year=1973|edition=4th|pages=139}}</ref>  Decade boxes are made for [resistance](/source/Resistance_(electricity)), [capacitance](/source/capacitance), and [inductance](/source/inductance), the values of which can be adjusted incrementally by the turning of a knob or switch, with the [contacts](/source/Electrical_contacts) of the switch moving along a [series](/source/Series_and_parallel_circuits) of the respective components.<ref name="IM1">{{Cite web|title=More About Decade Boxes|url=https://www.instrumart.com/MoreAboutCategory?CategoryID=5983|access-date=2016-05-22|website=Instrumart}}</ref>  The interface for these devices usually consists of dials or adjustable tape counters, and they are operated in-circuit and without any external power source.<ref name=="SF1">{{Cite web|title=Decade Resistance Box Hookup Guide - learn.sparkfun.com|url=https://learn.sparkfun.com/tutorials/decade-resistance-box-hookup-guide|access-date=2016-10-10|website=[SparkFun Electronics](/source/SparkFun_Electronics)}}</ref>

==References==
{{Reflist}}
{{Commons category|Resistance Decade}}

Category:Analog circuits
Category:Electronic test equipment

{{electronics-stub}}

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Adapted from the Wikipedia article [Decade box](https://en.wikipedia.org/wiki/Decade_box) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Decade_box?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.