{"id":20026,"date":"2019-07-16T00:00:00","date_gmt":"2019-07-16T00:00:00","guid":{"rendered":"https:\/\/www.mailgun.com\/blog\/snack-delivery-machine-part-2-the-electronics-and-tech-2\/"},"modified":"2026-09-14T21:18:19","modified_gmt":"2026-09-14T21:18:19","slug":"snack-delivery-machine-part-2-the-electronics-and-tech","status":"publish","type":"blog","link":"https:\/\/www.mailgun.com\/fr\/blog\/dev-life\/snack-delivery-machine-part-2-the-electronics-and-tech\/","title":{"rendered":"Machine de livraison de snacks\u00a0: partie 2, l&rsquo;\u00e9lectronique et la technologie"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Avant d&rsquo;aborder les aspects techniques, si vous n&rsquo;avez pas lu notre\u00a0<a href=\"\/?blog_category=snack-delivery-machine-part-1-mechanics\" target=\"_tabs\" rel=\"noopener noreferrer\">article pr\u00e9c\u00e9dent<\/a>\u00a0sur notre merveilleux distributeur de snacks, allez d&rsquo;abord y jeter un \u0153il\u00a0! Nous avons achet\u00e9 un distributeur de snacks standard et l&rsquo;avons transform\u00e9 en robot, mais il est maintenant temps de le doter d&rsquo;un cerveau. Et par cerveau, nous voulons bien s\u00fbr parler d&rsquo;un Raspberry Pi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Si vous avez lu d&rsquo;autres articles sur nos projets m\u00e9caniques, vous avez peut-\u00eatre remarqu\u00e9 que nous avons tendance \u00e0 utiliser un Raspberry Pi pour nos bidouillages mat\u00e9riels. Ils sont faciles \u00e0 configurer, disposent d&rsquo;une tonne d&rsquo;extensions et tout le monde ou presque adore jouer avec. C&rsquo;\u00e9tait le choix parfait pour ce que nous voulions accomplir\u00a0: la distribution automatique ultime de snacks.<\/p>\n\n\n\r\n    <nav data-content-type=\"longform\" class=\"toc-block longform-spacings px-5 py-6 px-md-6 px-lg-7 py-md-7 bg-light fs-sm rounded-lg\" aria-labelledby=\"toc-title-6642\"><p class=\"h5 m-0\" id=\"toc-title-6642\">Table des mati\u00e8res<\/p><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">01<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#controle-des-moteurs-pas-a-pas\">Contr\u00f4le des moteurs pas \u00e0 pas<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">02<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#alimentation\">Alimentation<\/a><\/div><\/div><div class=\"d-flex mt-3\"><div class=\"w-auto fw-bold text-accent d-flex me-2\">03<\/div><div class=\"d-flex flex-column\"><a class=\"fw-bold scrollme link-body-color text-accent\" href=\"#assemblage\">Assemblage<\/a><\/div><\/div><\/nav>\n\n\n<h2 class=\"wp-block-heading\">Contr\u00f4le des moteurs pas \u00e0 pas<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">En parlant d&rsquo;extensions, l&rsquo;une d&rsquo;entre elles est le\u00a0<a href=\"https:\/\/www.adafruit.com\/product\/2348\" target=\"_tabs\" rel=\"noopener noreferrer\">Adafruit DC &amp; Stepper Motor HAT<\/a>, qui semble parfaitement nous convenir.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4000\" width=\"970\" height=\"728\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/2348-02.jpg\" alt=\"2348-02\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/2348-02.jpg 970w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/2348-02-300x225.jpg 300w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/2348-02-768x576.jpg 768w\" sizes=\"(max-width: 970px) 100vw, 970px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">La carte se compose d&rsquo;un contr\u00f4leur de\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Pulse-width_modulation\" target=\"_tabs\" rel=\"noopener noreferrer\">modulation de largeur d&rsquo;impulsion<\/a>\u00a0\u00a0<a href=\"https:\/\/cdn-shop.adafruit.com\/datasheets\/PCA9685.pdf\" target=\"_tabs\" rel=\"noopener noreferrer\">PCA9685<\/a>\u00a0et de deux pilotes de moteur bas\u00e9s sur le\u00a0<a href=\"https:\/\/cdn-shop.adafruit.com\/datasheets\/TB6612FNG_datasheet_en_20121101.pdf\" target=\"_tabs\" rel=\"noopener noreferrer\">TB6612FNG<\/a>. Le contr\u00f4leur re\u00e7oit les commandes via le bus\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/I%C2%B2C\" target=\"_tabs\" rel=\"noopener noreferrer\">I2C<\/a>\u00a0depuis le Pi et les traduit en signaux PWM appropri\u00e9s. Ces signaux basse tension entrent dans les pilotes et contr\u00f4lent les sorties 12\u00a0V pour alimenter les moteurs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nos moteurs sont des\u00a0<a href=\"https:\/\/learn.adafruit.com\/all-about-stepper-motors\/types-of-steppers#coils-and-phases-2-13\" target=\"_tabs\" rel=\"noopener noreferrer\">moteurs pas \u00e0 pas bipolaires<\/a>, ce qui signifie qu&rsquo;ils se composent de deux groupes de bobines qui doivent \u00eatre aliment\u00e9s avec une polarit\u00e9 altern\u00e9e. Heureusement, le TB6612FNG est con\u00e7u pour fonctionner avec des moteurs doubles, chaque pilote sera donc d\u00e9di\u00e9 \u00e0 son propre moteur pas \u00e0 pas. Les pilotes disposent d&rsquo;un circuit de distribution d&rsquo;alimentation s\u00e9par\u00e9, que nous aborderons dans la section suivante.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Alimentation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nous avons achet\u00e9 notre Pi chez\u00a0<a href=\"https:\/\/www.canakit.com\/\" target=\"_tabs\" rel=\"noopener noreferrer\">CanaKit<\/a>\u00a0et il \u00e9tait fourni avec un adaptateur secteur micro-USB basique de 2,5\u00a0A et 5\u00a0V. Les moteurs du HAT n\u00e9cessitent 12\u00a0V et doivent \u00eatre aliment\u00e9s s\u00e9par\u00e9ment. Comme ils consomment 350\u00a0mA chacun, nous devons leur fournir au moins 700\u00a0mA. Les pilotes consomment environ 2\u00a0mA chacun, ce qui n&rsquo;est pas tr\u00e8s significatif. Cependant, lors de la conception d&rsquo;un syst\u00e8me (m\u00eame logiciel), nous recommandons vivement d&rsquo;appliquer un coefficient de s\u00e9curit\u00e9 de deux \u00e0 trois, voire plus.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pour concevoir des syst\u00e8mes s\u00fbrs et robustes, nous devons prendre en compte notre ignorance du monde r\u00e9el. Prenez, par exemple, le\u00a0<a href=\"https:\/\/www.aps.org\/publications\/apsnews\/201611\/physicshistory.cfm\" target=\"_tabs\" rel=\"noopener noreferrer\">pont du d\u00e9troit de Tacoma<\/a>\u00a0par rapport au pont de Brooklyn. Le pont du d\u00e9troit de Tacoma n&rsquo;avait pas de coefficient de s\u00e9curit\u00e9 et s&rsquo;est in\u00e9vitablement effondr\u00e9. \u00c0 l&rsquo;inverse, le pont de Brooklyn a \u00e9t\u00e9 construit avec un coefficient de s\u00e9curit\u00e9 de cinq \u00e0 six et existe encore aujourd&rsquo;hui.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Heureusement, il existe des tonnes d&rsquo;options en mati\u00e8re d&rsquo;alimentations pour que notre distributeur de snacks reste parfaitement s\u00fbr. Nous avons simplement opt\u00e9 pour une alimentation de\u00a0<a href=\"https:\/\/www.amazon.com\/gp\/product\/B073QTNF9F\/ref=pe_2262140_193471420_b2b_ap_email_product\" target=\"_tabs\" rel=\"noopener noreferrer\">5\u00a0A<\/a>\u00a0. Si le branchement de l&rsquo;alimentation en toute s\u00e9curit\u00e9 vous inqui\u00e8te toujours, ceci\u00a0<a href=\"https:\/\/learn.adafruit.com\/adafruit-dc-and-stepper-motor-hat-for-raspberry-pi\/powering-motors\" target=\"_tabs\" rel=\"noopener noreferrer\">guide<\/a>\u00a0peut vous aider.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Assemblage<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Maintenant que nous avions tout ce dont nous avions besoin pour terminer le distributeur de snacks, il \u00e9tait temps de tout assembler. Place aux photos\u00a0!<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4001\" width=\"700\" height=\"1244\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/supplies-700x1244-1.png\" alt=\"supplies-700x1244\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/supplies-700x1244-1.png 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/supplies-700x1244-1-169x300.png 169w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/supplies-700x1244-1-576x1024.png 576w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Avant de vraiment commencer, nous avons d\u00fb souder le HAT.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4023\" width=\"700\" height=\"1244\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/solder_controller_1-700x1244-1.png\" alt=\"solder_controller_1-700x1244\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/solder_controller_1-700x1244-1.png 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/solder_controller_1-700x1244-1-169x300.png 169w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/solder_controller_1-700x1244-1-576x1024.png 576w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ensuite, il a fallu fixer le connecteur d&rsquo;alimentation.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4033\" width=\"1024\" height=\"576\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/speaker_wire_power.png\" alt=\"speaker_wire_power\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/speaker_wire_power.png 1024w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/speaker_wire_power-300x169.png 300w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/speaker_wire_power-768x432.png 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Une fois l&rsquo;alimentation en place, nous avons pu relier les moteurs au HAT.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4036\" width=\"700\" height=\"933\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/Image-from-iOS-44-700x933-1.jpg\" alt=\"Image-from-iOS-44-700x933\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/Image-from-iOS-44-700x933-1.jpg 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/Image-from-iOS-44-700x933-1-225x300.jpg 225w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Pour contr\u00f4ler le HAT via l&rsquo;I2C, nous devons installer\u00a0<a href=\"https:\/\/github.com\/adafruit\/Adafruit_CircuitPython_MotorKit\" target=\"_tabs\" rel=\"noopener noreferrer\">Adafruit CircuitPython MotorKit<\/a>. L&rsquo;\u00a0<a href=\"https:\/\/learn.adafruit.com\/adafruit-dc-and-stepper-motor-hat-for-raspberry-pi\/installing-software\" target=\"_tabs\" rel=\"noopener noreferrer\">installation<\/a>\u00a0, ce qui est assez simple, et nous avons fini par utiliser ceci\u00a0<a href=\"https:\/\/learn.adafruit.com\/adafruit-dc-and-stepper-motor-hat-for-raspberry-pi\/using-stepper-motors\" target=\"_tabs\" rel=\"noopener noreferrer\">guide<\/a>\u00a0pour faire fonctionner correctement les moteurs pas \u00e0 pas. Dans notre cas, nous avons \u00e9labor\u00e9 un algorithme de va-et-vient correct et l&rsquo;avons ajust\u00e9 pour distribuer la bonne quantit\u00e9 de snacks en un seul passage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le voici\u00a0! Un prototype fonctionnel\u00a0!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Comme d&rsquo;habitude, nous avons connect\u00e9 la machine \u00e0 Mailgun. Cela pouvait se faire de diff\u00e9rentes mani\u00e8res et, comme nous l&rsquo;avons d\u00e9j\u00e0 abord\u00e9 dans d&rsquo;autres\u00a0<a href=\"\/?blog_category=mission-to-mars-pycon-2014\" target=\"_tabs\" rel=\"noopener noreferrer\">autre<\/a>\u00a0<a href=\"\/?blog_category=hardware-fun-building-an-email-controlled-gun-for\" target=\"_tabs\" rel=\"noopener noreferrer\">articles<\/a>\u00a0, nous n&rsquo;allons pas nous y attarder ici. Cependant, il y a une opportunit\u00e9 int\u00e9ressante d&rsquo;en faire un v\u00e9ritable appareil IoT.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" class=\"wp-image-4037\" width=\"700\" height=\"769\" src=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/blurredinstructions-700x769-1.jpg\" alt=\"blurredinstructions-700x769\" srcset=\"https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/blurredinstructions-700x769-1.jpg 700w, https:\/\/www.mailgun.com\/wp-content\/uploads\/2025\/07\/blurredinstructions-700x769-1-273x300.jpg 273w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Pour l&rsquo;instant, nous l&rsquo;utilisons simplement dans la cuisine pour que les membres de l&rsquo;\u00e9quipe de Mailgun puissent se r\u00e9galer de M&amp;Ms comme des chefs. Toujours est-il qu&rsquo;il a permis de distribuer de d\u00e9licieux bonbons \u00e0 tout le monde, et a suscit\u00e9 pas mal de rires lorsqu&rsquo;il s&rsquo;est d\u00e9branch\u00e9 pour ensuite livrer\u00a0<b>trop de\u00a0<\/b>M&amp;Ms une fois rebranch\u00e9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avant d&rsquo;aborder les aspects techniques, si vous n&rsquo;avez pas lu notre pr\u00e9c\u00e9dent article sur notre merveilleux distributeur de snacks, allez d&rsquo;abord y jeter un \u0153il\u00a0! Nous avons achet\u00e9 un distributeur de snacks standard et l&rsquo;avons transform\u00e9 en robot, mais il est maintenant temps de le doter d&rsquo;un cerveau. Et par cerveau, nous voulons bien s\u00fbr parler d&rsquo;un Raspberry Pi.<\/p>\n","protected":false},"author":14,"featured_media":3952,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"blog_category":[19],"class_list":["post-20026","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-dev-life"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Machine de livraison de snacks\u00a0: partie 2, l&#039;\u00e9lectronique et la technologie - Transactional Email API Service For Developers | Mailgun<\/title>\n<meta name=\"description\" content=\"Que se passe-t-il lorsque vous achetez un distributeur de snacks et que vous le connectez \u00e0 un Raspberry Pi\u00a0? 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