{"id":95,"date":"2009-12-23T21:21:35","date_gmt":"2009-12-24T02:21:35","guid":{"rendered":"http:\/\/ammonsengineering.com\/blog\/?p=95"},"modified":"2009-12-23T21:21:35","modified_gmt":"2009-12-24T02:21:35","slug":"limit-switches","status":"publish","type":"post","link":"https:\/\/ammonsengineering.com\/blog\/2009\/12\/limit-switches\/","title":{"rendered":"Limit Switches"},"content":{"rendered":"<p>While searching the digikey website for photo detectors for another purpose, I came across some optical sensors that should work very well as limit switches.\u00a0 They\u00a0reflect infrared light off a diffusing surface with a range of 2 to 22 mm.\u00a0 I assume the optimum distance is about 11 mm.\u00a0 Right now I plan on positioning them so they reflect off the bottom surface of the bearing block.\u00a0 They are small and flat and should fit nicely under the bearing block.\u00a0 I ordered two sensors (425-2042-ND), three connectors (one spare) (A98801-ND), and ten feet of ribbon cable (AE09G-10-ND) for about $13 plus shipping.\u00a0 The sensors use three wires: GND, 5V, and signal.\u00a0 I plan on pulling off three wire strips of ribbon cable and coloring one edge black (GND)\u00a0and the other edge red (5V) with permanent markers.\u00a0 I can separate the wires at each end and keep a nice clean cable in between.\u00a0\u00a0My original thought was to buy the individual components\u00a0and design my own circuit, but it would have cost more than buying the prebuilt sensor.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>While searching the digikey website for photo detectors for another purpose, I came across some optical sensors that should work very well as limit switches.\u00a0 They\u00a0reflect infrared light off a diffusing surface with a range of 2 to 22 mm.\u00a0 I assume the optimum distance is about 11 mm.\u00a0 Right now I plan on positioning [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-95","post","type-post","status-publish","format-standard","hentry","category-hardware"],"_links":{"self":[{"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/posts\/95","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/comments?post=95"}],"version-history":[{"count":1,"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/posts\/95\/revisions"}],"predecessor-version":[{"id":96,"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/posts\/95\/revisions\/96"}],"wp:attachment":[{"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/media?parent=95"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/categories?post=95"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ammonsengineering.com\/blog\/wp-json\/wp\/v2\/tags?post=95"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}