{"id":944,"date":"2020-01-15T01:42:59","date_gmt":"2020-01-14T15:42:59","guid":{"rendered":"https:\/\/blog.hegars.com\/?p=944"},"modified":"2020-01-22T19:51:12","modified_gmt":"2020-01-22T09:51:12","slug":"944","status":"publish","type":"post","link":"https:\/\/blog.hegars.com\/?p=944","title":{"rendered":"EasyDriver and the A3967"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.schmalzhaus.com\/EasyDriver\/\">https:\/\/www.schmalzhaus.com\/EasyDriver\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.sparkfun.com\/products\/12779\">https:\/\/www.sparkfun.com\/products\/12779<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.robotgear.com.au\/Product.aspx\/Details\/2940-EasyDriver-Stepper-Motor-Driver\">https:\/\/www.robotgear.com.au\/Product.aspx\/Details\/2940-EasyDriver-Stepper-Motor-Driver<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Letting the blue smoke out<\/h2>\n\n\n\n<p>I think I somehow applied a reverse voltage from an unprotected 7AH SLA battery to the A3967 and it blew the A3967 pretty hard letting the blue smoke escape. BZZZRT&#8230;.<\/p>\n\n\n\n<p>This blew a hole in the package on the A3967 and fearing other components on the board also got fried.<\/p>\n\n\n\n<p>After removal of the A3967 from the ED board the reg circuit seems to test fine. Ready for replacement.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"727\" height=\"582\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-1.png\" alt=\"\" class=\"wp-image-945\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-1.png 727w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-1-300x240.png 300w\" sizes=\"(max-width: 727px) 100vw, 727px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Repair<\/h3>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"784\" height=\"736\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-2.png\" alt=\"\" class=\"wp-image-946\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-2.png 784w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-2-300x282.png 300w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-2-768x721.png 768w\" sizes=\"(max-width: 784px) 100vw, 784px\" \/><\/figure>\n\n\n\n<p>I ordered a new A3967 chip from e14<\/p>\n\n\n\n<p><a href=\"https:\/\/au.element14.com\/allegro-microsystems\/a3967slbtr-t\/motor-driver-20-to-85deg-c\/dp\/2980863?st=A3967\">https:\/\/au.element14.com\/allegro-microsystems\/a3967slbtr-t\/motor-driver-20-to-85deg-c\/dp\/2980863?st=A3967<\/a><\/p>\n\n\n\n<p>Parts arrived<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"785\" height=\"777\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-9.png\" alt=\"\" class=\"wp-image-974\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-9.png 785w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-9-300x297.png 300w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-9-768x760.png 768w\" sizes=\"(max-width: 785px) 100vw, 785px\" \/><\/figure>\n\n\n\n<p>All Fixed<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"466\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-10.png\" alt=\"\" class=\"wp-image-975\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-10.png 768w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-10-300x182.png 300w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">The Regulator <\/h2>\n\n\n\n<p><a href=\"https:\/\/www.ti.com\/store\/ti\/en\/p\/product\/?p=LM317EMP\/NOPB\">https:\/\/www.ti.com\/store\/ti\/en\/p\/product\/?p=LM317EMP\/NOPB<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"931\" height=\"550\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-3.png\" alt=\"\" class=\"wp-image-959\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-3.png 931w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-3-300x177.png 300w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-3-768x454.png 768w\" sizes=\"(max-width: 931px) 100vw, 931px\" \/><\/figure>\n\n\n\n<p>SJ2 open equals 720ohm<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"665\" height=\"622\" src=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-4.png\" alt=\"\" class=\"wp-image-960\" srcset=\"https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-4.png 665w, https:\/\/blog.hegars.com\/wp-content\/uploads\/2020\/01\/image-4-300x281.png 300w\" sizes=\"(max-width: 665px) 100vw, 665px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/www.schmalzhaus.com\/EasyDriver\/ https:\/\/www.sparkfun.com\/products\/12779 https:\/\/www.robotgear.com.au\/Product.aspx\/Details\/2940-EasyDriver-Stepper-Motor-Driver Letting the blue smoke out I think I somehow applied a reverse voltage from an unprotected 7AH SLA battery to the A3967 and it blew the A3967 pretty hard letting the blue smoke escape. BZZZRT&#8230;. This blew a hole in the package on the A3967 and fearing other components on the board [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[17],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/944"}],"collection":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=944"}],"version-history":[{"count":15,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/944\/revisions"}],"predecessor-version":[{"id":977,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/944\/revisions\/977"}],"wp:attachment":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}