{"id":56,"date":"2026-07-15T22:30:00","date_gmt":"2026-07-15T20:30:00","guid":{"rendered":"https:\/\/cekuj.washany.eu\/?p=56"},"modified":"2026-07-22T23:59:13","modified_gmt":"2026-07-22T21:59:13","slug":"solarni-usb-svetlo-treba-do-detskeho-domku","status":"publish","type":"post","link":"https:\/\/cekuj.washany.eu\/?p=56","title":{"rendered":"Sol\u00e1rn\u00ed USB sv\u011btlo t\u0159eba do d\u011btsk\u00e9ho domku"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Jak si postavit malou sol\u00e1rn\u00ed &#8222;elektr\u00e1rnu&#8220; a uk\u00e1zat si jak to funguje? C\u00edlem bylo jednoduch\u00e9 za\u0159\u00edzen\u00ed, kter\u00e9 se p\u0159es den nabije ze slunce a ve\u010der poskytne d\u011btem na zahrad\u011b p\u0159\u00edjemn\u00e9 osv\u011btlen\u00ed. Bonus? USB v\u00fdstup pro nab\u00edjen\u00ed drobn\u00e9 elektroniky.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nakonec vznikl vlastn\u00ed modul s Li-Ion bateri\u00ed, MPPT nab\u00edjen\u00edm, pojistkou a 3D ti\u0161t\u011bnou krabi\u010dkou s vlastn\u00edm designem <strong>VUVU SOLAR<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Co za\u0159\u00edzen\u00ed um\u00ed<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>nap\u00e1jen\u00ed z 12V sol\u00e1rn\u00edho panelu,<\/li>\n\n\n\n<li>nab\u00edjen\u00ed jednoho \u010dl\u00e1nku Li-Ion 18650 pomoc\u00ed MPPT regul\u00e1toru,<\/li>\n\n\n\n<li>ochranu baterie proti p\u0159ebit\u00ed, podvybit\u00ed i zkratu,<\/li>\n\n\n\n<li>hlavn\u00ed vyp\u00edna\u010d,<\/li>\n\n\n\n<li>pojistku na vstupu,<\/li>\n\n\n\n<li>indik\u00e1tor stavu baterie,<\/li>\n\n\n\n<li>USB v\u00fdstup pro LED lampi\u010dku nebo nab\u00edjen\u00ed drobn\u00fdch za\u0159\u00edzen\u00ed,<\/li>\n\n\n\n<li>vlastn\u00ed 3D ti\u0161t\u011bnou vod\u011bodoln\u011bj\u0161\u00ed krabi\u010dku.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Cel\u00e9 \u0159e\u0161en\u00ed je navr\u017eeno jako jednoduch\u00fd a bezpe\u010dn\u00fd ostrovn\u00ed syst\u00e9m bez p\u0159ipojen\u00ed k s\u00edti.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pou\u017eit\u00e9 komponenty<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><th>Komponenta<\/th><th>Cena<\/th><\/tr><tr><td>LED grafick\u00fd indik\u00e1tor kapacity Li-Ion 18650<\/td><td>43 K\u010d<\/td><\/tr><tr><td>Panelov\u00fd kol\u00e9bkov\u00fd vyp\u00edna\u010d<\/td><td>14 K\u010d<\/td><\/tr><tr><td>LiitoKala 18650 3400 mAh s v\u00fdvody<\/td><td>119 K\u010d<\/td><\/tr><tr><td>Ochrann\u00fd modul Li-Ion 1S 3 A<\/td><td>11 K\u010d<\/td><\/tr><tr><td>Sklen\u011bn\u00e1 pojistka 5\u00d720 mm 5 A<\/td><td>5 K\u010d<\/td><\/tr><tr><td>Panelov\u00fd dr\u017e\u00e1k pojistky<\/td><td>14 K\u010d<\/td><\/tr><tr><td>MPPT sol\u00e1rn\u00ed nab\u00edje\u010dka CN3791 pro 12V panel<\/td><td>80 K\u010d<\/td><\/tr><tr><td>Sol\u00e1rn\u00ed panel 8 W \/ 12 V<\/td><td>301 K\u010d<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Celkov\u00e1 cena elektroniky se pohybuje okolo <strong>587 K\u010d<\/strong>. K tomu je pot\u0159eba p\u0159ipo\u010d\u00edtat LED lampi\u010dku, USB konektory, kabel\u00e1\u017e a n\u011bkolik gram\u016f filamentu na tisk krabi\u010dky.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Vlastn\u00ed 3D ti\u0161t\u011bn\u00e1 krabi\u010dka<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Trochu \u010dasu nakonec zabral n\u00e1vrh krabi\u010dky.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Model vznikl v OpenSCAD nad parametrick\u00fdm n\u00e1vrhem vod\u011bodoln\u00e9 krabi\u010dky. Jako zdroj jsem pou\u017eil model <a href=\"https:\/\/www.printables.com\/model\/72839-customizable-parametric-stable-and-waterproof-elec\" data-type=\"link\" data-id=\"https:\/\/www.printables.com\/model\/72839-customizable-parametric-stable-and-waterproof-elec\">Customizable parametric stable and waterproof electronics ip65 ip67 project box enclosure case housing<\/a>. V\u00ed\u010dko jsem upravil p\u0159esn\u011b podle pou\u017eit\u00fdch komponent \u2013 p\u0159idal jsem v\u00fd\u0159ezy pro USB konektory, vyp\u00edna\u010d, indik\u00e1tor baterie i budouc\u00ed roz\u0161\u00ed\u0159en\u00ed. Nechyb\u00ed ani zapu\u0161t\u011bn\u00e9 popisky jednotliv\u00fdch ovl\u00e1dac\u00edch prvk\u016f a n\u00e1zev projektu <strong>VUVU SOLAR<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Velkou v\u00fdhodou parametrick\u00e9ho modelu je mo\u017enost b\u011bhem n\u011bkolika minut zm\u011bnit rozm\u011bry nebo rozm\u00edst\u011bn\u00ed otvor\u016f bez p\u0159ekreslov\u00e1n\u00ed cel\u00e9 krabi\u010dky.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pro\u010d MPPT?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00edsto jednoduch\u00e9ho line\u00e1rn\u00edho nab\u00edjen\u00ed jsem zvolil modul <strong>CN3791<\/strong>, kter\u00fd vyu\u017e\u00edv\u00e1 princip MPPT (Maximum Power Point Tracking). D\u00edky tomu dok\u00e1\u017ee l\u00e9pe vyu\u017e\u00edt v\u00fdkon sol\u00e1rn\u00edho panelu zejm\u00e9na p\u0159i prom\u011bnliv\u00e9m osv\u011btlen\u00ed a zkr\u00e1tit dobu nab\u00edjen\u00ed baterie. U mal\u00fdch ostrovn\u00edch syst\u00e9m\u016f je ka\u017ed\u00fd z\u00edskan\u00fd watt zn\u00e1t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Bezpe\u010dnost p\u0159edev\u0161\u00edm<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">P\u0159esto\u017ee jde o mal\u00e9 za\u0159\u00edzen\u00ed, n\u011bkolik ochrann\u00fdch prvk\u016f pova\u017euji za samoz\u0159ejmost:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ochrann\u00fd BMS modul pro Li-Ion \u010dl\u00e1nek,<\/li>\n\n\n\n<li>pojistka na nap\u00e1jec\u00ed v\u011btvi,<\/li>\n\n\n\n<li>kvalitn\u00ed zna\u010dkov\u00fd \u010dl\u00e1nek LiitoKala,<\/li>\n\n\n\n<li>mechanicky pevn\u00e1 3D ti\u0161t\u011bn\u00e1 krabi\u010dka.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">D\u00edky tomu m\u016f\u017ee za\u0159\u00edzen\u00ed bez obav fungovat dlouhodob\u011b v d\u011btsk\u00e9m domku nebo na zahrad\u011b.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jak si postavit malou sol\u00e1rn\u00ed &#8222;elektr\u00e1rnu&#8220; a uk\u00e1zat si jak to funguje? C\u00edlem bylo jednoduch\u00e9 za\u0159\u00edzen\u00ed, kter\u00e9 se p\u0159es den nabije ze slunce a ve\u010der poskytne d\u011btem na zahrad\u011b p\u0159\u00edjemn\u00e9 osv\u011btlen\u00ed. Bonus? USB v\u00fdstup pro nab\u00edjen\u00ed drobn\u00e9 elektroniky. Nakonec vznikl vlastn\u00ed modul s Li-Ion bateri\u00ed, MPPT nab\u00edjen\u00edm, pojistkou a 3D ti\u0161t\u011bnou krabi\u010dkou s vlastn\u00edm designem [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":58,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-56","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nezarazene","has-thumbnail"],"_links":{"self":[{"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=\/wp\/v2\/posts\/56","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=56"}],"version-history":[{"count":1,"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=\/wp\/v2\/posts\/56\/revisions"}],"predecessor-version":[{"id":57,"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=\/wp\/v2\/posts\/56\/revisions\/57"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=\/wp\/v2\/media\/58"}],"wp:attachment":[{"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=56"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=56"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cekuj.washany.eu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=56"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}