{"id":676,"date":"2012-06-08T11:20:57","date_gmt":"2012-06-08T16:20:57","guid":{"rendered":"https:\/\/david.bookstaber.com\/Interests\/?p=676"},"modified":"2020-01-04T19:00:56","modified_gmt":"2020-01-05T00:00:56","slug":"all-plug-in-clocks-should-have-capacitor-backups","status":"publish","type":"post","link":"https:\/\/david.bookstaber.com\/Interests\/2012\/06\/all-plug-in-clocks-should-have-capacitor-backups\/","title":{"rendered":"All plug-in clocks should have capacitor backups"},"content":{"rendered":"<p>I just bought the <a href=\"http:\/\/www.amazon.com\/Honeywell-Econoswitch-RPLS740B-Programmable-Switch\/dp\/B004AP92N2\/ref=cm_cr_pr_product_top\" target=\"_blank\" rel=\"noopener noreferrer\">Honeywell RPLS740B Econoswitch<\/a>, a clever dawn\/dusk switch that knows when the sun will be down year-round based on the latitude entered during setup.  I&#8217;m using it to switch on exterior lights at dusk, saving me the trouble of frequently adjusting the set-point of the mechanical switch it replaces.<\/p>\n<p>One feature I particularly appreciate is its use of a super-capacitor to keep time during power interruptions.<\/p>\n<p>Every plug-in device with a clock should have a supercapacitor time backup.  Some use batteries as clock backups, but many more &#8212; including expensive appliances like my various ovens &#8212; have no backup at all.  Unlike batteries, capacitors have an unlimited service life: See this whitepaper on &#8220;<a href=\"http:\/\/www.cooperindustries.com\/content\/dam\/public\/bussmann\/Electronics\/Resources\/App%20Notes%20and%20Tech%20Info\/PowerStor\/BUS_Elx_App_Notes_K_Series.pdf\">Supercapacitors for RTC and Memory Backup<\/a>.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I just bought the Honeywell RPLS740B Econoswitch, a clever dawn\/dusk switch that knows when the sun will be down year-round based on the latitude entered during setup. I&#8217;m using it to switch on exterior lights at dusk, saving me the trouble of frequently adjusting the set-point of the mechanical switch it replaces. One feature I [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[65,56],"tags":[],"class_list":["post-676","post","type-post","status-publish","format-standard","hentry","category-opinion","category-tech"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/po3d1-aU","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/posts\/676","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/comments?post=676"}],"version-history":[{"count":3,"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/posts\/676\/revisions"}],"predecessor-version":[{"id":1671,"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/posts\/676\/revisions\/1671"}],"wp:attachment":[{"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/media?parent=676"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/categories?post=676"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/david.bookstaber.com\/Interests\/wp-json\/wp\/v2\/tags?post=676"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}