{"componentChunkName":"component---src-templates-blog-post-tsx","path":"/7-in-7-day-05/","webpackCompilationHash":"1406cdec8d1475dbc431","result":{"data":{"site":{"siteMetadata":{"siteUrl":"https://blog.akshaybaweja.com"}},"markdownRemark":{"id":"da1e9242-071b-5750-86f4-fcae9d9fb3eb","excerpt":"Problem A blind person knows any obstructing objects in front of him/her but does not know where to go. Either a helper always goes along with him/her or ask…","html":"<h2>Problem</h2>\n<p>A blind person knows any obstructing objects in front of him/her but does not know where to go. Either a helper always goes along with him/her or ask for directions all along the way.</p>\n<h2>Idea</h2>\n<p>The idea is to embed 8 haptic feedback motors (or LRAs) sandwiched alongside the belt in all 8 directions on a compass along with a driving system which will be inside the belt’s buckle.</p>\n<p>\n  <a\n    class=\"gatsby-resp-image-link\"\n    href=\"/static/c3988c8d3859730c7de3528048feae4c/ddb1c/belt1.jpg\"\n    style=\"display: block\"\n    target=\"_blank\"\n    rel=\"noopener\"\n  >\n  \n  <span\n    class=\"gatsby-resp-image-wrapper\"\n    style=\"position: relative; display: block;  max-width: 590px; margin-left: auto; margin-right: auto;\"\n  >\n    <span\n      class=\"gatsby-resp-image-background-image\"\n      style=\"padding-bottom: 100%; position: relative; bottom: 0; left: 0; background-image: url('data:image/jpeg;base64,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'); background-size: cover; display: block;\"\n    >\n      <img\n        class=\"gatsby-resp-image-image\"\n        style=\"width: 100%; height: 100%; margin: 0; vertical-align: middle; position: absolute; top: 0; left: 0; box-shadow: inset 0px 0px 0px 400px white;\"\n        alt=\"belt-1\"\n        title=\"\"\n        src=\"/static/c3988c8d3859730c7de3528048feae4c/c739e/belt1.jpg\"\n        srcset=\"/static/c3988c8d3859730c7de3528048feae4c/8ee9c/belt1.jpg 148w,\n/static/c3988c8d3859730c7de3528048feae4c/ebbe7/belt1.jpg 295w,\n/static/c3988c8d3859730c7de3528048feae4c/c739e/belt1.jpg 590w,\n/static/c3988c8d3859730c7de3528048feae4c/5413e/belt1.jpg 885w,\n/static/c3988c8d3859730c7de3528048feae4c/4efde/belt1.jpg 1180w,\n/static/c3988c8d3859730c7de3528048feae4c/ddb1c/belt1.jpg 1338w\"\n        sizes=\"(max-width: 590px) 100vw, 590px\"\n      />\n    </span>\n  </span>\n  \n  </a>\n    </p>\n<p>The above illustration shows belt fitted with Haptic Motors (or LRAs). This driving system will be a custom designed PCB with following components on it -</p>\n<ul>\n<li>9 DOF IMU – this will consist of a 3-axis accelerometer, gyroscope and a magnetometer.</li>\n<li>Low Energy Bluetooth 4.0 – this will be used to connect to phone that has bluetooth and internet connectivity.</li>\n<li>A micro-controller for interfacing the IMUs and Bluetooth – ATMega328 is a preferred choice.</li>\n<li>Battery – Minimum requirements are 3.7V with a capacity of 1000mAh</li>\n<li>LiPo Charger – A charger on board for charging up the battery.</li>\n</ul>\n<p>\n  <a\n    class=\"gatsby-resp-image-link\"\n    href=\"/static/8436d00e01285f0f51620befd83f1bdd/b3ee8/belt2.jpg\"\n    style=\"display: block\"\n    target=\"_blank\"\n    rel=\"noopener\"\n  >\n  \n  <span\n    class=\"gatsby-resp-image-wrapper\"\n    style=\"position: relative; display: block;  max-width: 590px; margin-left: auto; margin-right: auto;\"\n  >\n    <span\n      class=\"gatsby-resp-image-background-image\"\n      style=\"padding-bottom: 94.79166666666666%; position: relative; bottom: 0; left: 0; background-image: url('data:image/jpeg;base64,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'); background-size: cover; display: block;\"\n    >\n      <img\n        class=\"gatsby-resp-image-image\"\n        style=\"width: 100%; height: 100%; margin: 0; vertical-align: middle; position: absolute; top: 0; left: 0; box-shadow: inset 0px 0px 0px 400px white;\"\n        alt=\"belt2\"\n        title=\"\"\n        src=\"/static/8436d00e01285f0f51620befd83f1bdd/c739e/belt2.jpg\"\n        srcset=\"/static/8436d00e01285f0f51620befd83f1bdd/8ee9c/belt2.jpg 148w,\n/static/8436d00e01285f0f51620befd83f1bdd/ebbe7/belt2.jpg 295w,\n/static/8436d00e01285f0f51620befd83f1bdd/c739e/belt2.jpg 590w,\n/static/8436d00e01285f0f51620befd83f1bdd/5413e/belt2.jpg 885w,\n/static/8436d00e01285f0f51620befd83f1bdd/b3ee8/belt2.jpg 960w\"\n        sizes=\"(max-width: 590px) 100vw, 590px\"\n      />\n    </span>\n  </span>\n  \n  </a>\n    </p>\n<p>The buckle will have magnets in design so that it makes it easy for the differently-abled people to charge the battery and a button on top of buckle to start or stop navigation.</p>\n<p>There is an Android and iOS compatible application that will help the differently-abled to navigate by communicating with device. The app will send the heading direction and corresponding feedback motor will turn on signalling to the user about direction in which he/she needs to turn.</p>\n<h2>Communication Flow</h2>\n<p>\n  <a\n    class=\"gatsby-resp-image-link\"\n    href=\"/static/c8280b82a50ca3d9a785fe4d51dda833/c4ad0/belt3.jpg\"\n    style=\"display: block\"\n    target=\"_blank\"\n    rel=\"noopener\"\n  >\n  \n  <span\n    class=\"gatsby-resp-image-wrapper\"\n    style=\"position: relative; display: block;  max-width: 590px; margin-left: auto; margin-right: auto;\"\n  >\n    <span\n      class=\"gatsby-resp-image-background-image\"\n      style=\"padding-bottom: 65.35776614310646%; position: relative; bottom: 0; left: 0; background-image: url('data:image/jpeg;base64,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'); background-size: cover; display: block;\"\n    >\n      <img\n        class=\"gatsby-resp-image-image\"\n        style=\"width: 100%; height: 100%; margin: 0; vertical-align: middle; position: absolute; top: 0; left: 0; box-shadow: inset 0px 0px 0px 400px white;\"\n        alt=\"belt3\"\n        title=\"\"\n        src=\"/static/c8280b82a50ca3d9a785fe4d51dda833/c739e/belt3.jpg\"\n        srcset=\"/static/c8280b82a50ca3d9a785fe4d51dda833/8ee9c/belt3.jpg 148w,\n/static/c8280b82a50ca3d9a785fe4d51dda833/ebbe7/belt3.jpg 295w,\n/static/c8280b82a50ca3d9a785fe4d51dda833/c739e/belt3.jpg 590w,\n/static/c8280b82a50ca3d9a785fe4d51dda833/5413e/belt3.jpg 885w,\n/static/c8280b82a50ca3d9a785fe4d51dda833/c4ad0/belt3.jpg 1146w\"\n        sizes=\"(max-width: 590px) 100vw, 590px\"\n      />\n    </span>\n  </span>\n  \n  </a>\n    </p>\n<ul>\n<li>When the button is pressed it notifies app to start the listen mode where the user says the location he wants to travel to.</li>\n<li>Once the location is said user’s location is calculated and data is fetched from Google’s Directions API.</li>\n<li>This returned data is processed step by step along with user’s location and user’s heading direction which is calculated by the IMU in user’s buckle.</li>\n<li>A single signal is sent from app to the buckle when user needs to change his/her heading direction. This signal is processed by the buckle’s micro-controller which turns on specific haptic motor, notifying user about direction change.</li>\n<li>When user reaches his/her direction all motors vibrate for a split second notifying arrival.</li>\n<li>User can press the button twice on his/her belt to stop the navigation.</li>\n</ul>","fields":{"slug":"/7-in-7-day-05/"},"frontmatter":{"title":"7-in-7 | Day 5","date":"26 Oct, 2019","description":"Rapid 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