US energy harvesting firm Powercast has developed a battery-free retail price tag that can be changed from 2m away using a hand-held UHF programmer. Key to the tag is the firm’s PCC110 UHF-to-dc harvestign chip and an Eink display that only needs power to change, retaining its display after power is removed. “Powercast developed the ...
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from Electronics Weekly https://www.electronicsweekly.com/news/design/communications/uhf-harvester-powers-retail-tag-2m-gap-2018-04/
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