{"id":42,"date":"2019-10-21T15:46:33","date_gmt":"2019-10-21T15:46:33","guid":{"rendered":"https:\/\/starthardware.org\/en\/?p=42"},"modified":"2019-10-22T06:16:29","modified_gmt":"2019-10-22T06:16:29","slug":"unit-3-circuit","status":"publish","type":"post","link":"https:\/\/starthardware.org\/en\/unit-3-circuit\/","title":{"rendered":"Unit 3 \u2013 Circuit"},"content":{"rendered":"\n

Current always flows from plus pole to minus pole. You already know that from batteries. They\u2019ve got a plus and a minus side.<\/p><\/blockquote>\n\n\n\n

If you put batteries for instance into a flashlight it lights up. But that will only happen if you turn on the switch. This is called: closing the circuit.<\/p>\n\n\n\n

\"Arduino
So, that is a circuit. Current flows from plus to minus.<\/figcaption><\/figure>\n\n\n\n

Since the word circuit comes from circle. In the image above the components are arranged in a circle but this is only for a better understanding. Current flows always from plus to minus.<\/p>\n\n\n\n

The batteries in the circuit are called current source. There are other current sources like power adaptors, generators or solar cells.<\/p>\n\n\n\n

Current and voltage? What\u2019s that?<\/h3>\n\n\n\n

Well, that is a very good question and not so easy to explain. Let\u2019s compare electricity with a water pipe. The water in the pipe is under pressure. The more pressure in the pipe, the more powerful water squirts out of the faucet. If there wouldn\u2019t be any pressure, no water would flow. The amount of water is like the electrical current, the pressure is the voltage.<\/p>\n\n\n\n

Of course, there is no water in a socket. But there are little loaded parts inside. They are called electrons. The higher the voltage, the more electrons want to move. The movement of the electrons is the current.<\/p>\n\n\n\n

Warning: Don\u2019t ever connect something to a wall socket, what is not made for it! The voltage of wall sockets is really dangerous!<\/p>\n\n\n\n

So, now we want to build our own circuit, right? We will do that with the 5V which are provided by the Arduino board.<\/p>\n","protected":false},"excerpt":{"rendered":"

Current always flows from plus pole to minus pole. You already know that from batteries. They\u2019ve got a plus and a minus side. If you put batteries for instance into a flashlight it lights up. But that will only happen if you turn on the switch. This is called: closing the circuit. Since the word… Read More »Unit 3 \u2013 Circuit<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":44,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-42","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arduino-tutorial"],"yoast_head":"\nUnit 3 \u2013 Circuit - StartHardware - Tutorials for Arduino<\/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:\/\/starthardware.org\/en\/unit-3-circuit\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Unit 3 \u2013 Circuit - StartHardware - Tutorials for Arduino\" \/>\n<meta property=\"og:description\" content=\"Current always flows from plus pole to minus pole. 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