{"id":89600,"date":"2023-12-20T08:33:14","date_gmt":"2023-12-20T08:33:14","guid":{"rendered":"https:\/\/www.seeedstudio.com\/blog\/?p=89600"},"modified":"2024-05-27T08:36:09","modified_gmt":"2024-05-27T08:36:09","slug":"empowering-the-visually-impaired-xiao-esp32s3-sense-and-laser-navigation-innovations","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2023\/12\/20\/empowering-the-visually-impaired-xiao-esp32s3-sense-and-laser-navigation-innovations\/","title":{"rendered":"Empowering the Visually Impaired: XIAO ESP32S3 Sense and Laser Navigation Innovations"},"content":{"rendered":"\n<p>Delve into this innovative laser-guided system designed for visually impaired swimmers. Utilizing devices equipped with photodiodes, a fresnel lens, and the XIAO ESP32S3 Sense, swimmers receive haptic feedback via a Grove Haptic Motor.<\/p>\n\n\n\n<p><strong>Seeed Hardware<\/strong>:&nbsp;<a href=\"https:\/\/www.seeedstudio.com\/XIAO-ESP32S3-Sense-p-5639.html\" target=\"_blank\" rel=\"noreferrer noopener\">Seeed Studio XIAO ESP32S3 Sense<\/a>,&nbsp;<a href=\"https:\/\/www.seeedstudio.com\/Grove-Haptic-Motor-p-2546.html\" target=\"_blank\" rel=\"noreferrer noopener\">Grove &#8211; Haptic Motor<\/a><\/p>\n\n\n\n<p><strong>Software:<\/strong> Arduino IDE<\/p>\n\n\n\n<p><strong>Industry:<\/strong>&nbsp;Assistive Technology Industry, Rehabilitation and Healthcare, Adaptive Sports, Education and Training<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Background<\/h2>\n\n\n\n<p>Individuals with visual impairments may struggle to stay within swimming lanes due to the absence of visual cues such as lane ropes or floor markers. They lack visual orientation and must rely more on other senses. Additionally, they face navigational hurdles to avoid obstacles like ropes, swimmers, or pool walls. Maintaining a straight path becomes challenging without visual references, leading to potential drifting.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Challenge<\/h2>\n\n\n\n<p>This project built by <a href=\"https:\/\/www.linkedin.com\/in\/prasannaa-kumar-d-9ab2a1202\/\" target=\"_blank\" rel=\"noreferrer noopener\">Prasannaa Kumar<\/a> and <a href=\"https:\/\/www.linkedin.com\/in\/saran-raj-k-b880561b3\/\" target=\"_blank\" rel=\"noreferrer noopener\">Saran Raj<\/a> focuses on developing a laser-guided swimming lane aid. This system uses two line lasers emitting specific red wavelengths. Swimmers wear devices with photodiodes, a fresnel lens, and a microcontroller <a href=\"https:\/\/www.seeedstudio.com\/XIAO-ESP32S3-Sense-p-5639.html\" target=\"_blank\" rel=\"noreferrer noopener\">XIAO ESP32S3 Sense<\/a> for haptic feedback. As swimmers approach the laser, the lens focuses light onto the photodiode, triggering tactile feedback, helping them stay in their lane. This innovative approach improves swimming for those with visual impairments, ensuring better orientation in the pool.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Solution<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030584361487.png\" alt=\"\" class=\"wp-image-89629\" width=\"507\" height=\"285\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030584361487.png 740w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030584361487-300x169.png 300w\" sizes=\"(max-width: 507px) 100vw, 507px\" \/><\/figure><\/div>\n\n\n<p>In this project, Prasannaa Kumar and Saran Raj decided to use Fresnel Lens and Filter due to the following reasons:<\/p>\n\n\n\n<p><strong>Fresnel Lens:<\/strong><br>A Fresnel lens has ridges that refract light to focus it at a focal point. Its design allows for tailored sensor coverage and sensitivity. In this project, a PIR sensor&#8217;s Fresnel lens focuses scattered laser light onto the photodiode.<\/p>\n\n\n\n<p><strong>Optical Filter:<\/strong><br>Longpass filters transmit specific light wavelengths while blocking others. A 632nm filter used here enhances the 665nm red laser&#8217;s transmission. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Assembling Electronics<\/h3>\n\n\n\n<p>The PCB includes an AD8615 OPAMP, a Seeed Studio XIAO variant with compatible battery charging pads, and a haptic motor. After populating the PCB, it undergoes testing to gauge its response to ambient light.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"312\" height=\"554\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/ezgif.com-video-to-gif-converted.gif\" alt=\"\" class=\"wp-image-89630\"\/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\">Step 2: Adjusting the Resistance<\/h3>\n\n\n\n<p>The transimpedance amplifier interfaces a photodiode with an op-amp, converting photocurrent to a voltage output. The circuit connects the photodiode in reverse bias to the op-amp in a non-inverting setup. Adjusting R1 in the schematic alters the OPAMP output. For resistance changes, shine a line laser over 2 meters away onto the fresnel lens, ensuring the photodiode filter is in place.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030588864767.png\" alt=\"\" class=\"wp-image-89631\" width=\"480\" height=\"324\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030588864767.png 740w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030588864767-300x203.png 300w\" sizes=\"(max-width: 480px) 100vw, 480px\" \/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\">Step 3: 3D Printing and Assembly<\/h3>\n\n\n\n<p><a href=\"https:\/\/www.hackster.io\/511349\/a-laser-guided-swimming-lane-aid-d21bf0#cad\" target=\"_blank\" rel=\"noreferrer noopener\">Refer to the documents for the casing files.<\/a> After printing and post-processing the parts (removing supports and filing), assemble the electronics onto the casing. Before attaching the top section, ensure the filter is placed over the photodiode.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"416\" height=\"555\" data-id=\"89633\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030588993962.png\" alt=\"\" class=\"wp-image-89633\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030588993962.png 416w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030588993962-225x300.png 225w\" sizes=\"(max-width: 416px) 100vw, 416px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"416\" height=\"555\" data-id=\"89634\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030589116351.png\" alt=\"\" class=\"wp-image-89634\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030589116351.png 416w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030589116351-225x300.png 225w\" sizes=\"(max-width: 416px) 100vw, 416px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"416\" height=\"555\" data-id=\"89632\" src=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030589227663.png\" alt=\"\" class=\"wp-image-89632\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030589227663.png 416w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2023\/12\/\u4f01\u4e1a\u5fae\u4fe1\u622a\u56fe_17030589227663-225x300.png 225w\" sizes=\"(max-width: 416px) 100vw, 416px\" \/><\/figure>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">The Conclusion<\/h2>\n\n\n\n<p>In summary, the XIAO&#8217;s compact design offers a distinct advantage with its built-in battery charger and capability for battery operation, complemented by a voltage divider circuit for monitoring battery levels and user alerts. Moving forward, the project emphasizes comprehensive field testing, especially within swimming pool settings, with various planned experiments and iterations that include installing line lasers, determining optimal laser power based on pool dimensions, and developing silicone caps for the wearable device.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">More Information<\/h2>\n\n\n\n<p><strong>Learn More Project Details on<\/strong>&nbsp;<strong>Hackster:<\/strong>&nbsp;<a href=\"https:\/\/www.hackster.io\/prasannaa-kumar\/a-laser-guided-swimming-lane-aid-d21bf0\" target=\"_blank\" rel=\"noreferrer noopener\">A Laser Guided Swimming Lane Aid<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/xiao-series-page\" target=\"_blank\" rel=\"noreferrer noopener\">Seeed Studio XIAO Series<\/a><\/p>\n\n\n\n<p><em>Please feel free to reach out to&nbsp;<strong>maker.team@seeed.cc<\/strong>&nbsp;for any inquiries or if you\u2019d like to engage in further project discussions. Your questions and interest are welcomed.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Delve into this innovative laser-guided system designed for visually impaired swimmers. Utilizing devices equipped with<\/p>\n","protected":false},"author":3599,"featured_media":89629,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"iawp_total_views":0,"footnotes":""},"categories":[4391,4394],"tags":[6,632,25,139,4741,4706,3129,4555],"class_list":["post-89600","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-build","category-deploy","tag-arduino","tag-community","tag-diy","tag-grove","tag-healthcare","tag-seeed-studio-xiao","tag-xiao","tag-xiao-esp32s3-sense"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Empowering the Visually Impaired: XIAO ESP32S3 Sense and Laser Navigation Innovations - Latest News from Seeed Studio<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.seeedstudio.com\/blog\/2023\/12\/20\/empowering-the-visually-impaired-xiao-esp32s3-sense-and-laser-navigation-innovations\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Empowering the Visually Impaired: XIAO ESP32S3 Sense and Laser Navigation Innovations - Latest News from Seeed Studio\" \/>\n<meta property=\"og:description\" content=\"Delve into this innovative laser-guided system designed for visually impaired swimmers. 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