{"id":414,"date":"2011-01-19T00:35:55","date_gmt":"2011-01-19T00:35:55","guid":{"rendered":"http:\/\/baulkolites.com\/wp\/?p=414"},"modified":"2011-01-19T00:35:55","modified_gmt":"2011-01-19T00:35:55","slug":"how-to-soldering-soic-devices-by-hand","status":"publish","type":"post","link":"http:\/\/mynoellights.com\/blog\/?p=414","title":{"rendered":"HOW-TO: Soldering SOIC devices by hand"},"content":{"rendered":"<p>The secret to good SMT soldering is not to heat the IC too much and not to use too much solder.<\/p>\n<p>The following is the method I use to solder SOIC IC.  Some of the steps and techniques will be applicable to other Surface mount Devices, but hopefully these will be covered off in other How-Tos<br \/>\nTools required:<\/p>\n<ul>\n<li> ESD work environment<\/li>\n<li> ESD Tweezers<\/li>\n<li> Soldering Iron with a chisel tip (I use 2-2.4mm tip)<\/li>\n<li> Fine Solder 0.5mm diam is really good, 0.7mm diam will do<\/li>\n<li> Liquid Flux Pen<\/li>\n<li> Plastic Eraser<\/li>\n<\/ul>\n<p>Now for the good stuff:<\/p>\n<ol>\n<li> Clean the PCB pads if it has been sitting around for a while.  A Plastic Eraser is good for this.<\/li>\n<li> Place the board on an ESD work matt.<\/li>\n<li> Tin 2 diagonally opposite pads, for example 16 and 8 or 20 and 10.\n<ul>\n<li> You just want a small amount of solder in the pads and I try and make one of them a ground pin.<\/li>\n<\/ul>\n<\/li>\n<li> Dab the tinned pads with your flux pen<\/li>\n<li> Place the IC on the pads, paying particular attention to the pin alignment to the pads.\n<ul>\n<li> Don\u2019t forget to check Pin1 is on the right pad.<\/li>\n<\/ul>\n<\/li>\n<li> Holding the IC in place by gently pushing downward on the IC body with a pair 0f tweezers, solder the pins on the tinned pads.  Do not add additional solder.<\/li>\n<li> Now check the IC for alignment again, cause now is the time to make corrections.\n<ul>\n<li> To realign, gently apply the soldering iron to a pad and when the solder if molten, move the IC a small amount.  Reapply heat to the other pad to release any stress in the IC leg.<\/li>\n<\/ul>\n<\/li>\n<li> Place a straight section of solder against the un-soldered pins of the IC.  I actually place it so that the Solder doesn\u2019t touch the pad, but sits on the lowers section of the IC leg.<\/li>\n<li> Starting with the pin next to the tinned pad, gentle place the soldering iron tip against the pad and solder<\/li>\n<li> When the solder melts, count \u201c1 and 2\u201d and remove the tip and move to the next pin<\/li>\n<li> DO NOT Push any solder into the joint, ever.  You end up with too much solder<\/li>\n<li> Repeat for the other side of the IC.<\/li>\n<\/ol>\n<p>If this sounds complicated, then believe me it is not.\u00a0 Have a go.\u00a0 you will find you get in the swing of this real quickly.\u00a0 As I stated in the beginning, the secret to good SMD soldering is not to heat the IC too much and not to use too much solder.\u00a0 Good luck.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Soldering SOIC devices by hand <a href=\"http:\/\/mynoellights.com\/blog\/?p=414\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[11],"tags":[17,18,20],"_links":{"self":[{"href":"http:\/\/mynoellights.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/414"}],"collection":[{"href":"http:\/\/mynoellights.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/mynoellights.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/mynoellights.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/mynoellights.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=414"}],"version-history":[{"count":0,"href":"http:\/\/mynoellights.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/414\/revisions"}],"wp:attachment":[{"href":"http:\/\/mynoellights.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=414"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/mynoellights.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=414"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/mynoellights.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=414"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}