{"id":135,"date":"2013-11-10T13:11:25","date_gmt":"2013-11-10T13:11:25","guid":{"rendered":"http:\/\/paulsarduino.co.uk\/?p=135"},"modified":"2013-11-10T13:16:26","modified_gmt":"2013-11-10T13:16:26","slug":"clock-using-3-5-digit-seven-segment-display-and-no-extra-hardware","status":"publish","type":"post","link":"https:\/\/paulsarduino.co.uk\/?p=135","title":{"rendered":"Clock using 3.5 Digit Seven Segment Display and no extra hardware"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-137 alignright\" title=\"RTC Clock\" src=\"http:\/\/paulsarduino.co.uk\/wp-content\/uploads\/2013\/11\/RTC-Clock-300x219.jpg\" alt=\"\" width=\"300\" height=\"219\" srcset=\"https:\/\/paulsarduino.co.uk\/wp-content\/uploads\/2013\/11\/RTC-Clock-300x219.jpg 300w, https:\/\/paulsarduino.co.uk\/wp-content\/uploads\/2013\/11\/RTC-Clock-1024x748.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>Its been a while since I wrote anything here, but today&#8217;s post is how to run a common cathode multi digit seven segment display without extra shift regs or buffers.<\/p>\n<p>I software multiplex the segments and use the INPUT_PULLUP mode of the digital pins to ensure only one digit is written to at a time.<\/p>\n<p>I have actually used an RTC module for the time, but you don&#8217;t need one if you keep the power on and add a bit of setting logic :)<\/p>\n<p>All the docs are in the <a href=\"http:\/\/paulsarduino.co.uk\/?page_id=140\">code.<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Its been a while since I wrote anything here, but today&#8217;s post is how to run a common cathode multi digit seven segment display without extra shift regs or buffers. I software multiplex the segments and use the INPUT_PULLUP mode of the digital pins to ensure only one digit is written to at a time. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,4],"tags":[],"class_list":["post-135","post","type-post","status-publish","format-standard","hentry","category-arduino","category-arproject"],"_links":{"self":[{"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/135","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=135"}],"version-history":[{"count":3,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/135\/revisions"}],"predecessor-version":[{"id":142,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/135\/revisions\/142"}],"wp:attachment":[{"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=135"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}