DNOU8 boards are fully assembled and ready to install on your layout or diorama. DNOU8 boards provide digital ports allowing a microcontroller such as an Arduino or ESP controller to run LEDS, relays and other devices. Multiple DNOU8 boards can be connected together to create a chain of up to 256 digital ports.<\/p>\n\n\n\n
Place your boards and board stacks near the devices they control. Any time you need more than 8 ports in a given location, stack as many boards as necessary (up to 6) to meet the needs of that location. You goal is to keep the device leads short; the only wiring running running to your controller, and between multiple boards in a chain, should be one DNOU8 logic bundle (3 wires).<\/p>\n\n\n\n
DNOU8 (and the companion DNOU1 Kit) were designed to use +5v TTL logic. However, the board and it’s integrated circuits are 3v3 TTL compatible; the minimum switching voltage is 2 volts. This has not been fully tested but the boards should work with 3.3 volt boards using 3.3 volt TTL.<\/p>\n\n\n\n
Each DNOU8 board will require 2 connections: 1) a 3-wire logic connection to the microcontroller, or the the next upstream DNOU8 board in a chain; and 2) Power connections for TTL logic and for the devices the board will control.<\/p>\n\n\n\n
Devices can be powered from a different power supply than used for TTL. Device power can be at any DC voltage from 3.3 volts to a maximum of 30 volts, and can include inductive loads. This allows you to control a wide range of DC devices. In a chain, each board can have a different device power source as needed.<\/p>\n\n\n\n
ALL GROUNDS MUST BE TIED TOGETHER.<\/strong> When using multiple power sources, all grounds from all power sources must be joined to a Master ground.<\/p>\n","protected":false},"excerpt":{"rendered":" DNOU8 boards are fully assembled and ready to install on your layout or diorama. DNOU8 boards provide digital ports allowing a microcontroller such as an Arduino or ESP controller to run LEDS, relays and other devices. Multiple DNOU8 boards can be connected together to create a chain of up to 256 digital ports. Planning Your… Read More »Getting Started with DNOU8<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1480,"comment_status":"closed","ping_status":"closed","template":"","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":""},"doc_category":[119],"doc_tag":[],"class_list":["post-2408","docs","type-docs","status-publish","has-post-thumbnail","hentry","doc_category-getting-started-dnou8"],"year_month":"2026-04","word_count":291,"total_views":0,"reactions":{"happy":0,"normal":0,"sad":0},"author_info":{"name":"Site Administrator","author_nicename":"lew-admin","author_url":"https:\/\/beaglebay.com\/duinogear\/author\/lew-admin\/"},"doc_category_info":[{"term_name":"Getting Started","term_url":"https:\/\/beaglebay.com\/duinogear\/docs-category\/getting-started-dnou8\/"}],"doc_tag_info":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/docs\/2408","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/comments?post=2408"}],"version-history":[{"count":3,"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/docs\/2408\/revisions"}],"predecessor-version":[{"id":2412,"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/docs\/2408\/revisions\/2412"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/media\/1480"}],"wp:attachment":[{"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/media?parent=2408"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/doc_category?post=2408"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/beaglebay.com\/duinogear\/wp-json\/wp\/v2\/doc_tag?post=2408"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}