{"id":38,"date":"2024-04-04T03:04:46","date_gmt":"2024-04-04T00:04:46","guid":{"rendered":"https:\/\/sisu.ut.ee\/elektroonika\/51-555-taimer\/"},"modified":"2024-04-04T03:05:54","modified_gmt":"2024-04-04T00:05:54","slug":"51-555-taimer","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/elektroonika\/51-555-taimer\/","title":{"rendered":"5.1. 555 taimer"},"content":{"rendered":"<p>Sellest loengust alates tegeleme multivibraatoriga, mis k\u00e4ib spetsiaalselt selleks ette n\u00e4htud mikroskeemiga NE555. Selles loengus paneme makettplaadil kokku multivibraatori skeemi ja vaatame-kuulame kuidas ta k\u00e4ib. Esitame valemid multivibraatori v\u00f5nkesageduse m\u00e4\u00e4ramiseks.<\/p>\n<p style=\"text-align: center\"><\/p><div class=\"ratio ratio-16x9 mb-3\"><div class=\"video-placeholder-wrapper video-placeholder-wrapper--16x9\">\n\t\t\t    <div class=\"video-placeholder d-flex justify-content-center align-items-center\">\n\t\t\t        <div class=\"overlay text-white p-2 w-100 text-center d-block justify-content-center align-items-center\">\n\t\t\t            <div>Kolmandate osapoolte sisu n\u00e4gemiseks palun n\u00f5ustu k\u00fcpsistega.<\/div>\n\t\t\t            <button class=\"btn btn-secondary btn-sm mt-1 consent-change\">Muuda n\u00f5usolekut<\/button>\n\t\t\t        <\/div>\n\t\t\t    <\/div>\n\t\t\t<\/div>\n<\/div>\n<p style=\"text-align: center\"><a href=\"https:\/\/youtu.be\/h2KXHBCq76Y\" target=\"_blank\" rel=\"noopener\"><span id=\"docs-internal-guid-5797e69e-3cb4-bb63-701a-7f913cca4da3\" data-mce-mark=\"1\"><span data-mce-mark=\"1\">https:\/\/youtu.be\/h2KXHBCq76Y<\/span><\/span><\/a><\/p>\n\n<p>Vajalikud valemid:<\/p>\n<p style=\"padding-left: 30px\">v\u00f5nkeperiood t = 0,639\u00a0\u00b7 (R1 + 2 \u00b7 R2)\u00a0\u00b7 C<\/p>\n<p style=\"padding-left: 30px\"><span>v\u00f5nkesagedus\u00a0<\/span>$f=frac{1,44}{(R1+2cdot R2)cdot C}$<\/p>\n<p style=\"padding-left: 30px\">t<sub>H\u00a0<\/sub>= 0,693\u00a0\u00b7 (R1 + R2)\u00a0\u00b7 C<\/p>\n<p style=\"padding-left: 30px\">t<sub>L<\/sub> = 0,693\u00a0\u00b7 R2\u00a0\u00b7 C<\/p>\n<p>Praktilise t\u00f6\u00f6 jaoks vajad j\u00e4rgmisi vahendeid:<\/p>\n<ul>\n<li>makettplaat<\/li>\n<li>mikroskeem NE555<\/li>\n<li>9V patarei<\/li>\n<li>2 potentsiomeetrit 100k\u2126<\/li>\n<li>takistid<\/li>\n<li>kondensaatorid<\/li>\n<li>valgusdioodid<\/li>\n<li>piesovaljuh\u00e4\u00e4ldi<\/li>\n<\/ul>\n<p>Veebilingid:<\/p>\n<ul>\n<li>Mikroskeemi NE555 andmeleht:\u00a0<a href=\"http:\/\/www.ti.com\/lit\/ds\/symlink\/ne555.pdf\" target=\"_blank\" rel=\"noopener\">http:\/\/www.ti.com\/lit\/ds\/symlink\/ne555.pdf<\/a><\/li>\n<li>E-raamat 50 555 circuits (50 skeemi 555 taimeriga):\u00a0<a href=\"http:\/\/www.talkingelectronics.com\/projects\/50%20-%20555%20Circuits\/50-555Circuits.pdf\" target=\"_blank\" rel=\"noopener\">http:\/\/www.talkingelectronics.com\/projects\/50%20-%20555%20Circuits\/50-555Circuits.pdf<\/a><\/li>\n<\/ul>\n<h5><img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"40\" class=\"alignnone wp-image-77\" style=\"margin-right: 10px;margin-left: 10px\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/189\/motle.png\" title=\"motle.png\" alt=\"motle.png\">\u00a0M\u00f5tle kaasa!<\/h5>\n<ol>\n<li>Missugune mikroskeemi v\u00e4ljaviik j\u00e4i selles skeemis kasutamata?<\/li>\n<li>Missugused peaks olema takistite ja kondensaatorite v\u00e4\u00e4rtused, et impulsid oleksid h\u00e4sti pikad (t<sub>H<\/sub> oleks palju pikem kui t<sub>L<\/sub>)?<\/li>\n<li>Missugused peaks olema takistite ja kondensaatorite v\u00e4\u00e4rtused, et t<sub>H<\/sub> ja t<sub>L<\/sub> oleksid v\u00f5rdsed?<\/li>\n<\/ol>\n<p><\/p><div class=\"accordion mb-3\">\n        <div class=\"accordion-item accordion-item--white\">\n        <h2 class=\"accordion-header\" id=\"accordion-69d501031fb34-heading\">\n            <button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#accordion-69d501031fb34-collapse\" aria-expanded=\"true\" aria-controls=\"accordion-69d501031fb34-collapse\">Vastus<\/button>\n        <\/h2>\n        <div id=\"accordion-69d501031fb34-collapse\" class=\"accordion-collapse collapse\" aria-labelledby=\"accordion-69d501031fb34-heading\">\n            <div class=\"accordion-body\">\n<ol>\n<li>Kasutamata j\u00e4i <span><strong>v\u00e4ljaviik 5<\/strong><\/span>.<\/li>\n<li>t<sub>H<\/sub> ja t<sub>L<\/sub> valemitest n\u00e4eme, et juhul <span><strong>kui R1 on palju suurem kui R2<\/strong><\/span>.<\/li>\n<li><span><strong>T\u00e4pselt v\u00f5rdsed ei saagi<\/strong><\/span>. tH ja tL valemitest n\u00e4eme, et juhul kui R1=0. Aga R1 ei tohi olla null, loe J\u00e4ta meelde\u2019t. Kui R2 on palju suurem kui R1, siis on \u00a0t<sub>H<\/sub> ja t<sub>L<\/sub> peaaegu v\u00f5rdsed.<\/li>\n<\/ol>\n<p><\/p><\/div>\n        <\/div>\n        <\/div>\n    <\/div>\n<h5><img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"40\" class=\"alignnone wp-image-78\" style=\"margin-right: 10px;margin-left: 10px\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/189\/tahtis.png\" title=\"tahtis.png\" alt=\"tahtis.png\">\u00a0J\u00e4ta meelde!<\/h5>\n<p><strong>Mikroskeemi NE555 v\u00e4ljaviigu nr. 7 (mis on sisend) ja toitepinge vahel peab alati olema voolu piirav takisti, muidu p\u00f5leb mikroskeem l\u00e4bi. Potentsiomeetrist \u00fcksinda ei piisa, sest kui potentsiomeeter on p\u00f6\u00f6ratud \u00fchte \u00e4\u00e4rmisesse asendisse, siis on ta ikkagi samav\u00e4\u00e4rne l\u00fchisega e. takisti puudumisega. Mikroskeemi tervise nimel on m\u00f5istlik \u00fchendada potentsiomeetriga jadamisi takisti 0,5-1 k\u2126.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sellest loengust alates tegeleme multivibraatoriga, mis k\u00e4ib spetsiaalselt selleks ette n\u00e4htud mikroskeemiga NE555. Selles loengus paneme makettplaadil kokku multivibraatori skeemi ja vaatame-kuulame kuidas ta k\u00e4ib. Esitame valemid multivibraatori v\u00f5nkesageduse m\u00e4\u00e4ramiseks. Kolmandate osapoolte sisu n\u00e4gemiseks palun n\u00f5ustu k\u00fcpsistega. Muuda n\u00f5usolekut https:\/\/youtu.be\/h2KXHBCq76Y &#8230;<\/p>\n","protected":false},"author":93,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-38","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/38","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/users\/93"}],"replies":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/comments?post=38"}],"version-history":[{"count":1,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/38\/revisions"}],"predecessor-version":[{"id":238,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/38\/revisions\/238"}],"wp:attachment":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/media?parent=38"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}