{"id":11,"date":"2007-12-09T21:05:04","date_gmt":"2007-12-10T02:05:04","guid":{"rendered":"http:\/\/www.logicalzero.com\/blog\/?p=11"},"modified":"2014-05-23T01:15:15","modified_gmt":"2014-05-23T05:15:15","slug":"come-up-and-see-my-etchings","status":"publish","type":"post","link":"http:\/\/www.logicalzero.com\/blog\/?p=11","title":{"rendered":"Come up and see my etchings"},"content":{"rendered":"<p><a href=\"http:\/\/www.logicalzero.com\/blog\/images\/EtchedPCB.jpg\"><img src=\"http:\/\/www.logicalzero.com\/blog\/images\/EtchedPCB_thumb.jpg\" alt=\"My first attempt at PCB etching: a carrier for a SMD IC.\" title=\"My first attempt at PCB etching: a carrier for a SMD IC.\" style=\"margin: 4px\" align=\"left\" \/><\/a>I finally got around to doing some PCB etching. For my first experimental attempt, I made some little carrier boards for an SMD IC: a M62364FP digital\/analog converter, intended for the <a href=\"http:\/\/www.logicalzero.com\/blog\/?cat=7\" title=\"The Meter Thing Project\">analog meter project<\/a>.<\/p>\n<p>It&#8217;s been more than a month since I did the toner-transfer with a clothes iron to the copper-clad board (some incredibly thin stuff I bought at the <a href=\"http:\/\/web.mit.edu\/w1mx\/www\/swapfest.shtml\" title=\"The MIT Swapfest\" target=\"_blank\">MIT Swapfest<\/a> a while back), but I&#8217;ve been reluctant to break out the ferric chloride and do the actual etching. The transfer was only moderately successful; there was a small degree of smudging. I don&#8217;t think the paper moved; I may have used too much pressure and\/or heat. The smudging would have been acceptable for a board with larger traces, but it was enough to short some of the board&#8217;s traces. I had tried to scrape away some toner with an X-Acto knife before the etching, but that was only moderately (if at all) successful. I may try scraping away the tiny shorts with a diamond-tipped stylus; I think I have one around, somewhere.<\/p>\n<p>The etching took a remarkably long time. I&#8217;d pre-heated the ferric chloride by placing the bottle in a tub of warm water, and the ambient temperature was probably 65\u00c2\u00b0F, but it took nearly 30 minutes to complete etching. I etched two, one after the other, and each took about the same length of time. I should have probably left it in even longer; it could have removed the shorts.<\/p>\n<p>While this wasn&#8217;t the most successful attempt, it was my first try. I&#8217;m optimistic. Once I get some heavier copper-clad board, I&#8217;m going to try making the motor controller board. More board, along with some 3A diodes, is in the mail.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I finally got around to doing some PCB etching. For my first experimental attempt, I made some little carrier boards for an SMD IC: a M62364FP digital\/analog converter, intended for the analog meter project. It&#8217;s been more than a month since I did the toner-transfer with a clothes iron to the copper-clad board (some incredibly [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[8,7],"tags":[11,17],"_links":{"self":[{"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/11"}],"collection":[{"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11"}],"version-history":[{"count":1,"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/11\/revisions"}],"predecessor-version":[{"id":798,"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/11\/revisions\/798"}],"wp:attachment":[{"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.logicalzero.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}