{"id":84,"date":"2019-11-23T23:47:30","date_gmt":"2019-11-24T05:47:30","guid":{"rendered":"https:\/\/torensmith.com\/?p=84"},"modified":"2020-12-19T19:37:53","modified_gmt":"2020-12-20T01:37:53","slug":"keyboard-tinkering-part-2","status":"publish","type":"post","link":"https:\/\/torensmith.com\/?p=84","title":{"rendered":"Keyboard Tinkering, Part 2"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The obvious next step in cleaning up the wiring was to connect the IO expander chip directly to the keyboard PCB. Doing it with protoboard would have been a tight fit, so this was my first experience designing a custom PCB. I drew it up in EAGLE CAD, and sent if off to <a href=\"https:\/\/oshpark.com\/\">OSHPARK<\/a> to be manufactured for ridiculously cheap. ($9 for 3, if I recall correctly).<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1305-1024x768.jpg\" alt=\"\" class=\"wp-image-85\" srcset=\"https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1305-1024x768.jpg 1024w, https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1305-300x225.jpg 300w, https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1305-768x576.jpg 768w, https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1305-1536x1152.jpg 1536w, https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1305-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The board held the IO expander chip, three resistors needed to make it work, and a 4-pin connector for the power\/ground\/clock\/data lines to the bluetooth board. It cleaned up a lot of the wiring, but there was still the mess of the rows\/LEDs running to the bluetooth board:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1308-768x1024.jpg\" alt=\"\" class=\"wp-image-86\" srcset=\"https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1308-768x1024.jpg 768w, https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1308-225x300.jpg 225w, https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1308-1152x1536.jpg 1152w, https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1308-1536x2048.jpg 1536w, https:\/\/torensmith.com\/wp-content\/uploads\/2019\/11\/IMG_1308-scaled.jpg 1920w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption>Better, but still yuck.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Once again it worked, but I knew I could do better.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The obvious next step in cleaning up the wiring was to connect the IO expander chip directly to the keyboard PCB. Doing it with protoboard would have been a tight fit, so this was my first experience designing a custom PCB. I drew it up in EAGLE CAD, and sent if off to OSHPARK to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[1],"tags":[9,6,7],"class_list":["post-84","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-keyboard","tag-nmb","tag-space-invaders"],"_links":{"self":[{"href":"https:\/\/torensmith.com\/index.php?rest_route=\/wp\/v2\/posts\/84","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/torensmith.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/torensmith.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/torensmith.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/torensmith.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=84"}],"version-history":[{"count":1,"href":"https:\/\/torensmith.com\/index.php?rest_route=\/wp\/v2\/posts\/84\/revisions"}],"predecessor-version":[{"id":87,"href":"https:\/\/torensmith.com\/index.php?rest_route=\/wp\/v2\/posts\/84\/revisions\/87"}],"wp:attachment":[{"href":"https:\/\/torensmith.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=84"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/torensmith.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=84"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/torensmith.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=84"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}