{"id":8183,"date":"2006-04-13T08:55:00","date_gmt":"2006-04-13T12:55:00","guid":{"rendered":"https:\/\/nuxx.net\/blog\/2006\/04\/13\/casio-sk-1-midi-adapter\/"},"modified":"2026-07-01T11:34:23","modified_gmt":"2026-07-01T15:34:23","slug":"casio-sk-1-midi-adapter","status":"publish","type":"post","link":"https:\/\/nuxx.net\/blog\/2006\/04\/13\/casio-sk-1-midi-adapter\/","title":{"rendered":"Casio SK-1 MIDI Adapter"},"content":{"rendered":"

<\/a>
Completed Casio SK-1 MIDI Adapter
(Click for full res.)<\/center><\/p>\n

On the up side, I completed the PCB for the Casio SK-1 MIDI adapter that I’ve been working on. On the down side, it doesn’t work. After reassembling the SK-1 after cleaning it, everything seemed to work great. Then, after I hooked up power, fitted the PCB into the enclosure<\/a> (without gluing it yet), and attached the ribbon cable to the SK-1’s keyboard connections<\/a>, the SK-1 just makes a humming \/ buzzing sound. I think the problem is likely some part I missed soldering on top of the board or something. Or possibly a bad PCB-side connection on the ribbon cable.<\/p>\n

When making one’s own double-sided PCB, the holes aren’t plated on the inside with metal, so one has to solder parts on both the top and the bottom of the PCB. It was a bit of a hassle to solder things on both sides, but I thought<\/em> I it taken care of in most places. Maybe I’m wrong, though… Ah well, tonight (or sometime this weekend) I’ll remove the PCB, remove the power lines and ribbon cables, and double-check everything against the schematic.<\/p>\n

Here’s some of the pictures from my work on this last night:<\/p>\n

· Resharpened PCB drill bits, acquired from eBay. They are really, really small. The shafts on those bits is 1\/8″.<\/a>
\n· A very unshaved me, wearing a respirator and safety glasses. Both are needed as drilling and cutting PCBs makes lots of fiberglass \/ epoxy dust.<\/a>
\n· One of the bits (26 mil, I think) in the chuck of my Dremel.<\/a>
\n· The pile of parts needed for assembling the adapter, including some spare resistors sacrificed for their leads, which were needed to solder vias.<\/a>
\n· All vias soldered, and jumper A placed to turn off wrapping of notes from outside the keyboard’s normal range.<\/a>
\n· All parts (except for microcontroller, ROM, and wiring) attached to the board.<\/a>
\n· Completed board, with power wires and ribbon cable.<\/a>
\n· Ribbon cable attached to Casio SK-1’s keyboard connection.<\/a>
\n· Power wires attached to the external power jack and the PCB fitted next to the speaker.<\/a><\/p><\/blockquote>\n

So, that’s that. I’ve still got more to go with regards to fixing everything. I know it’s getting power… I just don’t know what else it is doing yet. By the time I had the board installed it was nearly 11pm and I’d been working on everything for about 4.5 hours. I needed a break. Hopefully things will progress further tonight \/ this weekend. At least I don’t work until Monday or so.<\/p>\n","protected":false},"excerpt":{"rendered":"

Completed Casio SK-1 MIDI Adapter(Click for full res.) On the up side, I completed the PCB for the Casio SK-1 MIDI adapter that I’ve been working on. On the down side, it doesn’t work. After reassembling the SK-1 after cleaning it, everything seemed to work great. Then, after I hooked up power, fitted the PCB\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-8183","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\/8183","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=8183"}],"version-history":[{"count":1,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/8183\/revisions"}],"predecessor-version":[{"id":13446,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/posts\/8183\/revisions\/13446"}],"wp:attachment":[{"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/media?parent=8183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/categories?post=8183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nuxx.net\/blog\/wp-json\/wp\/v2\/tags?post=8183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}