{"id":2714,"date":"2021-11-20T13:22:20","date_gmt":"2021-11-20T13:22:20","guid":{"rendered":"https:\/\/mc.scsiraidguru.com\/?page_id=2714"},"modified":"2024-01-09T21:20:56","modified_gmt":"2024-01-09T21:20:56","slug":"2n2222a-npn","status":"publish","type":"page","link":"https:\/\/mc.scsiraidguru.com\/index.php\/electrical-engineering\/transistors\/2n2222a-npn\/","title":{"rendered":"2N2222a NPN"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2714\" class=\"elementor elementor-2714\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cfac762 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cfac762\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e9c8eea\" data-id=\"e9c8eea\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2787ef1 elementor-widget elementor-widget-text-editor\" data-id=\"2787ef1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>NPN (Not Pin In)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-11a36dc elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"11a36dc\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f6617c6\" data-id=\"f6617c6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3669f28 elementor-widget elementor-widget-text-editor\" data-id=\"3669f28\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><a href=\"https:\/\/www.onsemi.com\/pdf\/datasheet\/p2n2222a-d.pdf\">P2N2222A datasheet<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-dca00e5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"dca00e5\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-5012857\" data-id=\"5012857\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-168a1d2 elementor-widget elementor-widget-image\" data-id=\"168a1d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:auto\/h:auto\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/2n2222a_to.png\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"2n2222a_to\" 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\/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-733ad28\" data-id=\"733ad28\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a5fffe4 elementor-widget elementor-widget-image\" data-id=\"a5fffe4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:auto\/h:auto\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/2n2222a_pin.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"2n2222a_pin\" 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\/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5bef00e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5bef00e\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-423b203\" data-id=\"423b203\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b3dcf7a elementor-widget elementor-widget-image\" data-id=\"b3dcf7a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:auto\/h:auto\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/20211120_103001-rotated.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"20211120_103001\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6Mjc0NiwidXJsIjoiaHR0cHM6XC9cL21jLnNjc2lyYWlkZ3VydS5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjFcLzExXC8yMDIxMTEyMF8xMDMwMDEtcm90YXRlZC5qcGcifQ%3D%3D\">\n\t\t\t\t\t\t\t<img data-opt-id=73963097  fetchpriority=\"high\" decoding=\"async\" width=\"169\" height=\"300\" src=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:169\/h:300\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/20211120_103001-rotated.jpg\" class=\"attachment-medium size-medium wp-image-2746\" alt=\"\" srcset=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:607\/h:1080\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/20211120_103001-rotated.jpg 1440w, https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:169\/h:300\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/20211120_103001-rotated.jpg 169w, https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:576\/h:1024\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/20211120_103001-rotated.jpg 576w, https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:607\/h:1080\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/20211120_103001-rotated.jpg 768w, https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:607\/h:1080\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/20211120_103001-rotated.jpg 864w, https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:607\/h:1080\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/20211120_103001-rotated.jpg 1152w\" sizes=\"(max-width: 169px) 100vw, 169px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-fbbdf62\" data-id=\"fbbdf62\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6db6a42 elementor-widget elementor-widget-image\" data-id=\"6db6a42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:auto\/h:auto\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/2N2222A_Switch_Schematic.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"2N2222A_Switch_Schematic\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6Mjc0NywidXJsIjoiaHR0cHM6XC9cL21jLnNjc2lyYWlkZ3VydS5jb21cL3dwLWNvbnRlbnRcL3VwbG9hZHNcLzIwMjFcLzExXC8yTjIyMjJBX1N3aXRjaF9TY2hlbWF0aWMuanBnIn0%3D\">\n\t\t\t\t\t\t\t<img data-opt-id=999469536  data-opt-src=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:300\/h:204\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/2N2222A_Switch_Schematic.jpg\"  loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"204\" src=\"data:image/svg+xml,%3Csvg%20viewBox%3D%220%200%20300%20204%22%20width%3D%22300%22%20height%3D%22204%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Crect%20width%3D%22300%22%20height%3D%22204%22%20fill%3D%22transparent%22%2F%3E%3C%2Fsvg%3E\" class=\"attachment-medium size-medium wp-image-2747\" alt=\"\" old-srcset=\"https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:690\/h:469\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/2N2222A_Switch_Schematic.jpg 690w, https:\/\/mlbxg5wzacc0.i.optimole.com\/cb:FyJ0.12d22\/w:300\/h:204\/q:mauto\/f:best\/https:\/\/mc.scsiraidguru.com\/wp-content\/uploads\/2021\/11\/2N2222A_Switch_Schematic.jpg 300w\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b6af74 elementor-widget elementor-widget-text-editor\" data-id=\"4b6af74\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The 2n2222a is a switch.\u00a0\u00a0 0V to base has the transistor off.\u00a0 When you push the button it energizes the transistor allowing the circuit to complete to the emitter, which is connected to ground.\u00a0\u00a0\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ee87c0f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ee87c0f\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-19ac72b\" data-id=\"19ac72b\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a4b59fa elementor-widget elementor-widget-text-editor\" data-id=\"a4b59fa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>So the direct connect LED math works out to be.<br \/>(5V-1.5V)\/20mA = 175 ohm resistor. Usually you use a 220 ohm resistor to dissipate the 3.5V.<br \/>using the 1k ohm resistor you get: (5V-1.5Vled)\/1k ohm = 3.5mA. 3.5mA \/20mA is a 17.5% duty cycle. It is like running PWM on Arduino. <time datetime=\"2021-11-20T18:28:20.523Z\" aria-label=\"Edited Today at 1:28 PM\"><\/time><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-32b6793 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"32b6793\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2b008bf\" data-id=\"2b008bf\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9e89542 elementor-widget elementor-widget-text-editor\" data-id=\"9e89542\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The LED connected to the 2N2222A connects to the 5V<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>NPN (Not Pin In) P2N2222A datasheet The 2n2222a is a switch.\u00a0\u00a0 0V to base has the transistor off.\u00a0 When you push the button it energizes the transistor allowing the circuit to complete to the emitter, which is connected to ground.\u00a0\u00a0\u00a0 So the direct connect LED math works out to be.(5V-1.5V)\/20mA = 175 ohm resistor. Usually [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2701,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"custom","ocean_center_header_left_menu":"0","ocean_custom_header_template":"7307","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","osh_disable_topbar_sticky":"default","osh_disable_header_sticky":"default","osh_sticky_header_style":"default","osh_sticky_header_effect":"","osh_custom_sticky_logo":0,"osh_custom_retina_sticky_logo":0,"osh_custom_sticky_logo_height":0,"osh_background_color":"","osh_links_color":"","osh_links_hover_color":"","osh_links_active_color":"","osh_links_bg_color":"","osh_links_hover_bg_color":"","osh_links_active_bg_color":"","osh_menu_social_links_color":"","osh_menu_social_hover_links_color":"","footnotes":""},"class_list":["post-2714","page","type-page","status-publish","hentry","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>2N2222a NPN -<\/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:\/\/mc.scsiraidguru.com\/index.php\/electrical-engineering\/transistors\/2n2222a-npn\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"2N2222a NPN -\" \/>\n<meta property=\"og:description\" content=\"NPN (Not Pin In) P2N2222A datasheet The 2n2222a is a switch.\u00a0\u00a0 0V to base has the transistor off.\u00a0 When you push the button it energizes the transistor allowing the circuit to complete to the emitter, which is connected to ground.\u00a0\u00a0\u00a0 So the direct connect LED math works out to be.(5V-1.5V)\/20mA = 175 ohm resistor. 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