{"id":171,"date":"2011-04-01T20:43:50","date_gmt":"2011-04-01T20:43:50","guid":{"rendered":"http:\/\/lushprojects.com\/blog\/?p=171"},"modified":"2011-04-01T20:43:50","modified_gmt":"2011-04-01T20:43:50","slug":"old-school-display","status":"publish","type":"post","link":"http:\/\/lushprojects.com\/blog\/2011\/04\/old-school-display\/","title":{"rendered":"Old-school display"},"content":{"rendered":"<p>I picked-up a job-lot of old LEDs from my friend <a href=\"http:\/\/www.electricstuff.co.uk\/\">Mike Harrison<\/a>. One thing that immediately caught me eye in there was an old Hewlett-Packard 5082-7415. Anyone under about 35 won&#8217;t recognise this item, but in the good old days the first 7 segment LED displays were so small that they needed to have a lens over the top to make them large enough to read. The display on my first calculator was just like this and I&#8217;ve retained a fondness for them.<\/p>\n<p>In this case the display had obviously been taken from equipment and the pins are quite badly damaged. However I managed to rig it in to an upside-down IC tester clip. Once in there I could confirm that electrically all was working perfectly.<\/p>\n<p>At the moment I am building the display in to a nice little surprise circuit. More on that soon, but here is the prototype:<br \/>\n<a href=\"http:\/\/www.flickr.com\/photos\/sharpie777\/5580560404\/\" title=\"Prototype display on HP 5082-7415 by Sharpie777, on Flickr\"><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/farm6.static.flickr.com\/5136\/5580560404_b24ca04ff6.jpg\" width=\"500\" height=\"375\" alt=\"Prototype display on HP 5082-7415\"><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I picked-up a job-lot of old LEDs from my friend Mike Harrison. One thing that immediately caught me eye in there was an old Hewlett-Packard 5082-7415. Anyone under about 35 won&#8217;t recognise this item, but in the good old days the first 7 segment LED displays were so small that they needed to have a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/posts\/171"}],"collection":[{"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/comments?post=171"}],"version-history":[{"count":2,"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/posts\/171\/revisions"}],"predecessor-version":[{"id":173,"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/posts\/171\/revisions\/173"}],"wp:attachment":[{"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/media?parent=171"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/categories?post=171"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/lushprojects.com\/blog\/wp-json\/wp\/v2\/tags?post=171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}