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dc.contributor.authorHughes, Robin W.
dc.contributor.authorWarner, Mark
dc.date.accessioned2021-01-13T17:22:20Z
dc.date.available2021-01-13T17:22:20Z
dc.date.issued2021-01-13
dc.date.submitted2020-02-01
dc.identifier.others41598-020-80617-2
dc.identifier.other80617
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/316146
dc.description.abstractAbstract: We explore the driving of LEDs by untransformed AC. An extreme case is driving 1.9 V threshold (red) LEDs with UK mains, peak voltage 325 V. Commonly, driving is by transformed, rectified (DC) supply with a series resistor (where a significant fraction of the power is wasted) to limit current in the LED. With AC, one can instead reactively limit to a maximum current safe for an LED by employing a series capacitive impedance. Cheaper and simpler supplies can thus be employed in some cases. We analyse such non-linear circuits, and also explore questions of duty cycle and power experimentally.
dc.languageen
dc.publisherNature Publishing Group UK
dc.rightsAttribution 4.0 International (CC BY 4.0)en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectArticle
dc.subject/639/766/25
dc.subject/639/166/987
dc.subjectarticle
dc.titleLEDs driven by AC without transformers or rectifiers
dc.typeArticle
dc.date.updated2021-01-13T17:22:19Z
prism.issueIdentifier1
prism.publicationNameScientific Reports
prism.volume11
dc.identifier.doi10.17863/CAM.63254
dcterms.dateAccepted2020-12-22
rioxxterms.versionofrecord10.1038/s41598-020-80617-2
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.identifier.eissn2045-2322
pubs.funder-project-idDepartment for Education, UK Government (Isaac Physics, Isaac Physics)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P034616/1)


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's licence is described as Attribution 4.0 International (CC BY 4.0)