{"id":1385,"date":"2024-02-06T09:49:08","date_gmt":"2024-02-06T17:49:08","guid":{"rendered":"https:\/\/unixwizardry.com\/?p=1385"},"modified":"2024-03-20T17:37:44","modified_gmt":"2024-03-21T00:37:44","slug":"maybe-i-should-have-the-checked-ic-pads","status":"publish","type":"post","link":"https:\/\/unixwizardry.com\/index.php\/2024\/02\/06\/maybe-i-should-have-the-checked-ic-pads\/","title":{"rendered":"Maybe I should have checked the IC pads :-("},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1385\" class=\"elementor elementor-1385\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-71864670 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"71864670\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6860718e\" data-id=\"6860718e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-212e276b elementor-widget elementor-widget-text-editor\" data-id=\"212e276b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: left;\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-1421 alignleft\" src=\"https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image3-300x296.jpeg\" alt=\"\" width=\"300\" height=\"296\" srcset=\"https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image3-300x296.jpeg 300w, https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image3-230x227.jpeg 230w, https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image3-350x346.jpeg 350w, https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image3.jpeg 468w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>Well, I blew it&#8230;again.\u00a0 This time with the IC footprint for the latest boards I received from JLCPCB, the 1-wire counter board for the rain gauge.\u00a0 I should have double checked the footprints before I sent it off for fabrication.\u00a0 Nuts.\u00a0 I guess I was careless picking a 6-pad footprint for the DS2423 counter chip.\u00a0 I used the SOT-23-6 Digikey footprint instead of a TSOC-6 one.\u00a0 I guess because I ordered these from Digikey long ago?\u00a0 I dunno.\u00a0 Good thing it&#8217;s only $2 for 5 boards, but it&#8217;s another setback.\u00a0 \u00a0So on the left is a DS2423 positioned on the new footprint.\u00a0 I exported a color PDF of the board so I could test the fit.\u00a0 This works pretty well, to export a PDF, which is pretty much actual size.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d35b90 elementor-widget elementor-widget-text-editor\" data-id=\"7d35b90\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><img decoding=\"async\" class=\"size-medium wp-image-1410 alignright\" src=\"https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image8-225x300.jpeg\" alt=\"\" width=\"225\" height=\"300\" \/>This next comparison shows a much better size footprint (SOIC-8) than I originally chose to use, fortunately, as a double check before I (again) send off the gerber and drill files &lt;sigh&gt;.\u00a0 \u00a0 And it appears there&#8217;s SO many SOIC-style footprints to choose from, which I think makes it kind of confusing.\u00a0 Especially for me, a Kicad EDA newbie, apparently.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af1f258 elementor-widget elementor-widget-text-editor\" data-id=\"af1f258\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><img decoding=\"async\" class=\"size-medium wp-image-1409 alignright\" src=\"https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image13-225x300.jpeg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image13-225x300.jpeg 225w, https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image13-230x307.jpeg 230w, https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image13-350x467.jpeg 350w, https:\/\/unixwizardry.com\/wp-content\/uploads\/2024\/02\/image13-rotated.jpeg 480w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/><\/p><p>This next pic shows the centering of the angle sensor using the mounting plate that held the original &#8220;precision&#8221; potentiometer .\u00a0 I won&#8217;t be using this plate &#8211; this is only a check.\u00a0 It looks good, but I may need to tweak the position some since there is a sweet spot with this chip.\u00a0 And I might have to maybe edit the TSOC-6 footprint for the rain gauge counter board (above) since I&#8217;m hand soldering these things.\u00a0 But so far this looks promising.\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Well, I blew it&#8230;again.\u00a0 This time with the IC footprint for the latest boards I received from JLCPCB, the 1-wire counter board [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41],"tags":[],"class_list":["post-1385","post","type-post","status-publish","format-standard","hentry","category-kicad"],"_links":{"self":[{"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/posts\/1385","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/comments?post=1385"}],"version-history":[{"count":34,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/posts\/1385\/revisions"}],"predecessor-version":[{"id":1437,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/posts\/1385\/revisions\/1437"}],"wp:attachment":[{"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/media?parent=1385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/categories?post=1385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unixwizardry.com\/index.php\/wp-json\/wp\/v2\/tags?post=1385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}