{"id":379,"date":"2016-06-14T17:09:02","date_gmt":"2016-06-14T07:09:02","guid":{"rendered":"http:\/\/leederville.net\/rocket\/?p=379"},"modified":"2016-06-14T17:29:24","modified_gmt":"2016-06-14T07:29:24","slug":"air-pressure-sensor-problems","status":"publish","type":"post","link":"https:\/\/leederville.net\/rocket\/index.php\/2016\/06\/14\/air-pressure-sensor-problems\/","title":{"rendered":"Air Pressure sensor problems"},"content":{"rendered":"<p>I quickly performed some &#8216;shake&#8217; tests of the payload on the desk. I managed to get a test run which generated NO Air pressure and temperature measurements!. Then next time I turned it on, it froze up when trying to detect the air pressure sensor. Not good!<\/p>\n<p>So I decided to pull the system apart and check out clearances between the air pressure sensor and surrounding electronics. The components are very close indeed. I proceeded to put some sticky-tape on both sides of the sensor to reduce chance of touching electronics on either side.<\/p>\n<p>I have performed the shake test (quite violently) twice now without any issues, so I&#8217;d say that the close proximity and the vibrations in the rocket caused a momentary short. I was lucky that the Gyroscope measurements still worked<\/p>\n<p>Fixes I&#8217;ll be looking at putting in are:-<\/p>\n<ul>\n<li>Minimum gap between components &#8211; 2mm<\/li>\n<li>Components supported opposite header\u00a0pins for breakout boards.<\/li>\n<li>Programming of circuit to timeout if it has issues connecting\/talking to a component.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>In any case, we&#8217;ll be completely redesigning the PCBs. So these problems will be resolved then.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I quickly performed some &#8216;shake&#8217; tests of the payload on the desk. I managed to get a test run which generated NO Air pressure and temperature measurements!. Then next time I turned it on, it froze up when trying to detect the air pressure sensor. Not good! So I decided to pull the system apart &hellip; <a href=\"https:\/\/leederville.net\/rocket\/index.php\/2016\/06\/14\/air-pressure-sensor-problems\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Air Pressure sensor problems<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,1],"tags":[],"_links":{"self":[{"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/posts\/379"}],"collection":[{"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/comments?post=379"}],"version-history":[{"count":3,"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/posts\/379\/revisions"}],"predecessor-version":[{"id":387,"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/posts\/379\/revisions\/387"}],"wp:attachment":[{"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/media?parent=379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/categories?post=379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/leederville.net\/rocket\/index.php\/wp-json\/wp\/v2\/tags?post=379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}