{"id":133,"date":"2011-09-03T22:46:35","date_gmt":"2011-09-04T03:46:35","guid":{"rendered":"http:\/\/roboboatblog.net\/blog\/?p=133"},"modified":"2011-09-29T19:19:35","modified_gmt":"2011-09-30T00:19:35","slug":"hb-25-motor-controllers","status":"publish","type":"post","link":"https:\/\/modelboatblog.tedatum.com\/?p=133","title":{"rendered":"HB-25 Motor Controllers"},"content":{"rendered":"<!-- index.php -->\n<div\n\tclass=\"ngg-galleryoverview ngg-ajax-pagination-none\"\n\tid=\"ngg-gallery-dde36570b9456e884cca1000b95ec05f-1\">\n\n    \t<div class=\"slideshowlink\">\n        <a href='https:\/\/modelboatblog.tedatum.com\/index.php\/nggallery\/slideshow?p=133'>[Show slideshow]<\/a>\n\t\t\n\t<\/div>\n\t\t\t<!-- Thumbnails -->\n\t\t\t\t<div id=\"ngg-image-0\" class=\"ngg-gallery-thumbnail-box\" >\n\t\t\t\t        <div class=\"ngg-gallery-thumbnail\">\n            <a href=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/spctl-1.jpg\"\n               title=\"The DC motor speed control module is a small compact unit.\"\n               data-src=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/spctl-1.jpg\"\n               data-thumbnail=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/thumbs\/thumbs_spctl-1.jpg\"\n               data-image-id=\"16\"\n               data-title=\"Speed Control 1\"\n               data-description=\"The DC motor speed control module is a small compact unit.\"\n               data-image-slug=\"speed-control-1\"\n               class=\"ngg-fancybox\" rel=\"dde36570b9456e884cca1000b95ec05f\">\n                <img\n                    title=\"Speed Control 1\"\n                    alt=\"Speed Control 1\"\n                    src=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/thumbs\/thumbs_spctl-1.jpg\"\n                    width=\"100\"\n                    height=\"75\"\n                    style=\"max-width:100%;\"\n                \/>\n            <\/a>\n        <\/div>\n\t\t\t\t\t\t\t<\/div> \n\t\t\t\n        \n\t\t\t\t<div id=\"ngg-image-1\" class=\"ngg-gallery-thumbnail-box\" >\n\t\t\t\t        <div class=\"ngg-gallery-thumbnail\">\n            <a href=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/spctl-2.jpg\"\n               title=\"I purchased two speed control modules. They are shown here with the Propeller experimental breadboard.\"\n               data-src=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/spctl-2.jpg\"\n               data-thumbnail=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/thumbs\/thumbs_spctl-2.jpg\"\n               data-image-id=\"17\"\n               data-title=\"Speed Control 2\"\n               data-description=\"I purchased two speed control modules. They are shown here with the Propeller experimental breadboard.\"\n               data-image-slug=\"speed-control-2\"\n               class=\"ngg-fancybox\" rel=\"dde36570b9456e884cca1000b95ec05f\">\n                <img\n                    title=\"Speed Control 2\"\n                    alt=\"Speed Control 2\"\n                    src=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/thumbs\/thumbs_spctl-2.jpg\"\n                    width=\"100\"\n                    height=\"75\"\n                    style=\"max-width:100%;\"\n                \/>\n            <\/a>\n        <\/div>\n\t\t\t\t\t\t\t<\/div> \n\t\t\t\n        \n\t\t\t\t<div id=\"ngg-image-2\" class=\"ngg-gallery-thumbnail-box\" >\n\t\t\t\t        <div class=\"ngg-gallery-thumbnail\">\n            <a href=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/spctl-3.jpg\"\n               title=\"The controller is cube shaped. The two holes in the heat sink are for mounting the module.\"\n               data-src=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/spctl-3.jpg\"\n               data-thumbnail=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/thumbs\/thumbs_spctl-3.jpg\"\n               data-image-id=\"18\"\n               data-title=\"Speed Control 3\"\n               data-description=\"The controller is cube shaped. The two holes in the heat sink are for mounting the module.\"\n               data-image-slug=\"speed-control-3\"\n               class=\"ngg-fancybox\" rel=\"dde36570b9456e884cca1000b95ec05f\">\n                <img\n                    title=\"Speed Control 3\"\n                    alt=\"Speed Control 3\"\n                    src=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/thumbs\/thumbs_spctl-3.jpg\"\n                    width=\"100\"\n                    height=\"75\"\n                    style=\"max-width:100%;\"\n                \/>\n            <\/a>\n        <\/div>\n\t\t\t\t\t\t\t<\/div> \n\t\t\t\n        \n\t\t\t\t<div id=\"ngg-image-3\" class=\"ngg-gallery-thumbnail-box\" >\n\t\t\t\t        <div class=\"ngg-gallery-thumbnail\">\n            <a href=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/spctl-4.jpg\"\n               title=\"Here you can see the cooling fan for the heat sink. This is why it can handle 25 amps of current\"\n               data-src=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/spctl-4.jpg\"\n               data-thumbnail=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/thumbs\/thumbs_spctl-4.jpg\"\n               data-image-id=\"19\"\n               data-title=\"Speed Control 4\"\n               data-description=\"Here you can see the cooling fan for the heat sink. This is why it can handle 25 amps of current\"\n               data-image-slug=\"speed-control-4\"\n               class=\"ngg-fancybox\" rel=\"dde36570b9456e884cca1000b95ec05f\">\n                <img\n                    title=\"Speed Control 4\"\n                    alt=\"Speed Control 4\"\n                    src=\"https:\/\/modelboatblog.tedatum.com\/wp-content\/gallery\/speedo\/thumbs\/thumbs_spctl-4.jpg\"\n                    width=\"100\"\n                    height=\"75\"\n                    style=\"max-width:100%;\"\n                \/>\n            <\/a>\n        <\/div>\n\t\t\t\t\t\t\t<\/div> \n\t\t\t\n        \n\t\t\n\t\t<!-- Pagination -->\n\t<div class='ngg-clear'><\/div>\t<\/div>\n\n<p>As you can see I have two of the <a href=\"http:\/\/www.parallax.com\/Portals\/0\/Downloads\/docs\/prod\/motors\/HB-25MotorController-V1.2.pdf\" target=\"_blank\">Parallax HB-25 Dc motor controllers<\/a> now on my workbench. They are rated at 6 to 16 volts (DC) at 25 amps. That should be rugged enough. I figure I only need one for testing but I would like to run twin screws on the demo boat.<\/p>\n<p>The controller is just over 1 \u00bd inches square and about the same in height. That makes them very small for the power they can handle.\u00a0 What makes them so high capacity is the attached micro cooling fan under the component board. There is a machined heat sink between the fan and the controller chip. The heat sink is drilled with holes like Swiss cheese.<\/p>\n<p>When I first saw these controllers probably a few years ago, my first thought was these were perfect for electric motor control on a model boat; actually large electric motors on a large model boat. Now I get to test my initial premise.<\/p>\n<p>Electrics and water always has me concerned. It is very possible the boat may be operated in times of light rain. So one of my challenges is how to mount and protect these controllers from moisture. If it was easy, anyone could do it. Other than a complete sinking, it\u2019s a matter of splash control.<\/p>\n<p>Then I just need a hull that is unsinkable (Titanic?)<\/p>\n<p>Trials will of course be run in calm waters but who knows what thrills may lay ahead when confidence and reliability allow the operating envelope to be expanded. Maybe build the first model icebreaker with a balsa wood hull.\u00a0 Uh\u2026 no, that can wait.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>As you can see I have two of the Parallax HB-25 Dc motor controllers now on my workbench. They are rated at 6 to 16 volts (DC) at 25 amps. That should be rugged enough. I figure I only need one for testing but I would like to run twin screws on the demo boat. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[4],"tags":[10,17,19],"_links":{"self":[{"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=\/wp\/v2\/posts\/133"}],"collection":[{"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=133"}],"version-history":[{"count":6,"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=\/wp\/v2\/posts\/133\/revisions"}],"predecessor-version":[{"id":339,"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=\/wp\/v2\/posts\/133\/revisions\/339"}],"wp:attachment":[{"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/modelboatblog.tedatum.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}