{"id":60302,"date":"2024-06-25T15:39:04","date_gmt":"2024-06-25T19:39:04","guid":{"rendered":"https:\/\/pappp.net\/?p=60302"},"modified":"2024-06-25T15:39:05","modified_gmt":"2024-06-25T19:39:05","slug":"drv8214","status":"publish","type":"post","link":"https:\/\/pappp.net\/?p=60302","title":{"rendered":"DRV8214"},"content":{"rendered":"\n<p>A buddy of mine dropped me a link to TI&#8217;s new brushed DC motor driver with sensorless speed control, the <a href=\"https:\/\/www.ti.com\/product\/DRV8214\">DRV8214<\/a>.  I spent a few minutes trying to hunt down the mechanism they use to derive speed from back EMF because it&#8217;s such an intriguing idea, and the datasheet proper is slightly cagey abut it&#8230; but it looks like they&#8217;ve fundamentally figured out how to build in the sensing and control loop from the <a href=\"https:\/\/www.ti.com\/lit\/ug\/tidud30a\/tidud30a.pdf\">filtered ripple counter mechanism<\/a> (PDF) they previously published a guide for doing with discrete H-bridge\/current sense\/op amp\/comparitor ICs and an MSP430 microcontroller directly into a $3-in-single-quantity I2C addressable chip.   <br \/>It even has stall detection that looks good enough to potentially use for sensor-less homing. <br \/>Interfacing to a host micro is fairly pin-and-peripheral intensive, but this seems like good magic. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>A buddy of mine dropped me a link to TI&#8217;s new brushed DC motor driver with sensorless speed control, the DRV8214. I spent a few minutes trying to hunt down the mechanism they use to derive speed from back EMF &hellip; <a href=\"https:\/\/pappp.net\/?p=60302\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"footnotes":""},"categories":[37,1,10],"tags":[],"class_list":["post-60302","post","type-post","status-publish","format-aside","hentry","category-electronics","category-general","category-objects","post_format-post-format-aside"],"_links":{"self":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/60302","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=60302"}],"version-history":[{"count":0,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/60302\/revisions"}],"wp:attachment":[{"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=60302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=60302"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=60302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}