{"id":8428,"date":"2006-09-08T15:14:00","date_gmt":"2006-09-08T19:14:00","guid":{"rendered":"https:\/\/nuxx.net\/blog\/2006\/09\/08\/casio-sk-1-midi-modification-v1-1-peer-review-request\/"},"modified":"2026-07-01T11:34:50","modified_gmt":"2026-07-01T15:34:50","slug":"casio-sk-1-midi-modification-v1-1-peer-review-request","status":"publish","type":"post","link":"https:\/\/nuxx.net\/blog\/2006\/09\/08\/casio-sk-1-midi-modification-v1-1-peer-review-request\/","title":{"rendered":"Casio SK-1 MIDI Modification v1.1 Peer Review Request"},"content":{"rendered":"<p>Hey everyone&#8230; As I mentioned last night that I would have to do, I&#8217;ve redesigned a bunch of the Casio SK-1 MIDI Modification PCB. This was to fix some { big | fat | stupid | huge | absurd | inexcusable } mistakes made in the original design.<\/p>\n<p>I think the design is now good, but I&#8217;m curious if anyone would be able to look it over for me. The schematic I made can be found <a href=\"http:\/\/www.nuxx.net\/files\/sk1-midi\/sk1_1_1_peer.pdf\">here in PDF format<\/a>, and the original which it was designed after (and should be checked against) is <a href=\"http:\/\/www.nuxx.net\/files\/sk1-midi\/sch8x10.png\">here as a PNG<\/a>.<\/p>\n<p>If you are curious about the board layout, a 300dpi representation of it (without ground plane) can be found <a href=\"http:\/\/www.nuxx.net\/files\/sk1-midi\/sk1_1_1_peer.png\">here as a PNG<\/a>.<\/p>\n<p>As notes, the MIDI input section is different, mostly because the original PC900 optocoupler is becoming harder to find. The standard 6N138 is used instead. I also tossed a couple bypass caps near the CPU and ROM, just to help ensure that they are stable.<\/p>\n<p>Thanks very much. :) I&#8217;m hoping to order these this weekend or Monday, if possible.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hey everyone&#8230; As I mentioned last night that I would have to do, I&#8217;ve redesigned a bunch of the Casio SK-1 MIDI Modification PCB. This was to fix some { big | fat | stupid | huge | absurd | inexcusable } mistakes made in the original design. I think the design is now good,\u2026<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,11,34],"tags":[],"class_list":["post-8428","post","type-post","status-publish","format-standard","hentry","category-electronics","category-making-things","category-moved-from-livejournal"],"_links":{"self":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/8428","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/comments?post=8428"}],"version-history":[{"count":1,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/8428\/revisions"}],"predecessor-version":[{"id":13201,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/8428\/revisions\/13201"}],"wp:attachment":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/media?parent=8428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/categories?post=8428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/tags?post=8428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}