{"id":54,"date":"2019-05-26T14:13:19","date_gmt":"2019-05-26T12:13:19","guid":{"rendered":"http:\/\/y-richter.de\/?p=54"},"modified":"2019-05-26T14:13:21","modified_gmt":"2019-05-26T12:13:21","slug":"hp-5082-74xx-7-segment-display-revived-70s-tech","status":"publish","type":"post","link":"https:\/\/y-richter.de\/?p=54","title":{"rendered":"HP 5082-74xx 7-segment display revived (70s tech)"},"content":{"rendered":"\n<p>Recently i found some of these rare 5 digit 7-segment modules from the 70s.<br><br>Once found in calculators and watches these tiny GaAsP LED modules amaze with their tiny, crisp, deep red segments with a whole digit not even 3mm tall. <br><br>I have created a simple breadboard friendly interface board featuring current limiting resistors and 2 shift registers (one for anodes and one for cathodes) for simple interfacing with modern microcontrollers.<br><br>Design files are found on the <a href=\"https:\/\/hackaday.io\/project\/165710-hp-5082-74xx-7-segment-display-revived\">hackaday.io project page<\/a>.<\/p>\n\n\n\n<ul class=\"is-layout-flex wp-block-gallery-1 wp-block-gallery columns-3 is-cropped\"><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"683\" src=\"http:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/7598631558714950388-1024x683.jpg\" alt=\"\" data-id=\"58\" class=\"wp-image-58\" srcset=\"https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/7598631558714950388-1024x683.jpg 1024w, https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/7598631558714950388-300x200.jpg 300w, https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/7598631558714950388-768x512.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>5082-74xx modules on a breadboard<\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"770\" src=\"http:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/4248741558631668085-1024x770.jpg\" alt=\"\" data-id=\"60\" data-link=\"http:\/\/y-richter.de\/?attachment_id=60\" class=\"wp-image-60\" srcset=\"https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/4248741558631668085-1024x770.jpg 1024w, https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/4248741558631668085-300x226.jpg 300w, https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/4248741558631668085-768x578.jpg 768w, https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/4248741558631668085.jpg 1969w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Bottom side<\/figcaption><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"820\" src=\"http:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/324121558714449784-1-1024x820.jpg\" alt=\"\" data-id=\"62\" data-link=\"http:\/\/y-richter.de\/?attachment_id=62\" class=\"wp-image-62\" srcset=\"https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/324121558714449784-1-1024x820.jpg 1024w, https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/324121558714449784-1-300x240.jpg 300w, https:\/\/y-richter.de\/wp-content\/uploads\/2019\/05\/324121558714449784-1-768x615.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Top side<\/figcaption><\/figure><\/li><\/ul>\n\n\n\n<p><br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Recently i found some of these rare 5 digit 7-segment modules from the 70s. Once found in calculators and watches these tiny GaAsP LED modules amaze with their tiny, crisp, deep red segments with a whole digit not even 3mm tall. I have created a simple breadboard friendly interface board featuring current limiting resistors and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":56,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/y-richter.de\/index.php?rest_route=\/wp\/v2\/posts\/54"}],"collection":[{"href":"https:\/\/y-richter.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/y-richter.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/y-richter.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/y-richter.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=54"}],"version-history":[{"count":3,"href":"https:\/\/y-richter.de\/index.php?rest_route=\/wp\/v2\/posts\/54\/revisions"}],"predecessor-version":[{"id":63,"href":"https:\/\/y-richter.de\/index.php?rest_route=\/wp\/v2\/posts\/54\/revisions\/63"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/y-richter.de\/index.php?rest_route=\/wp\/v2\/media\/56"}],"wp:attachment":[{"href":"https:\/\/y-richter.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=54"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/y-richter.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=54"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/y-richter.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=54"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}