{"id":5979,"date":"2020-10-26T03:51:39","date_gmt":"2020-10-26T03:51:39","guid":{"rendered":"http:\/\/rogerbit.com\/wprb\/?p=5979"},"modified":"2020-10-26T03:53:52","modified_gmt":"2020-10-26T03:53:52","slug":"%e2%9a%a1compact-variable-voltage-source-with-lm317t-integrated-circuit-for-protoboard","status":"publish","type":"post","link":"https:\/\/rogerbit.com\/wprb\/2020\/10\/%e2%9a%a1compact-variable-voltage-source-with-lm317t-integrated-circuit-for-protoboard\/","title":{"rendered":"\u26a1Compact variable voltage source with LM317T integrated circuit for protoboard"},"content":{"rendered":"

<\/iframe><\/p>\n<p>In this video we will see how to assemble an adjustable power supply, with the lm317 integrated circuit, and other electronic components. This project is ideal, if you want to put together an economical source, easy to make, and perfect to insert into our protoboard. Included is the printed circuit.<\/p>\n<p>The LM317t is a monolithic integrated circuit in TO-220, intended to be used as a positive adjustable voltage regulator.<br \/>\nIt is designed to supply more than 1.5 A of charging current with an adjustable output<\/p>\n<p>voltage in a range of 1.2 to 37 V. The rated output voltage is selected by a resistive divider, which makes device exceptionally easy to use.<\/p>\n<div>For use it only requires two external resistors to get the output value. In fact the load and regulation line is better than in fixed regulators. In addition to the best characteristics with respect to fixed regulators, it has protection for current limitation and excess temperature, being functional overload protection, even if the control terminal is disconnected.<\/div>\n<div>\n<hr \/>\n<\/div>\n<p>You may be interested in projects in Arduino, pic, robotics, telecommunications,\u00a0<a href=\"http:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1\">subscribe http:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1<\/a>\u00a0videos with full source code and diagrams<\/p>\n<div id=\"ubm-banners-rotation-n1\" data-interval=\"4000\" class=\"ubm_banners_rotation\" style=\"overflow: hidden; width: 200px; height: 150px;\"><div id=\"3_ubm_banner\" class=\"ubm_rotating_banner\"><a href=\"https:\/\/bit.ly\/3aXRDAu\" target=\"_blank\" rel=\"dofollow\"><img src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/useful_banner_manager_banners\/3-2-logo youtube.png\" width=\"100%\" height=\"100%\" alt=\"SUSCRIBETE A NUESTRO CANAL DE YOUTUBE, TUTORIALES GRATIS\" \/><\/a><\/div><\/div>\n<hr \/>\n<h4>Pinout<\/h4>\n<div><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pinout.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5207\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pinout-1024x585.jpg\" sizes=\"(max-width: 571px) 100vw, 571px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pinout-1024x585.jpg 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pinout-300x172.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pinout-768x439.jpg 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pinout-600x343.jpg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pinout-820x469.jpg 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pinout.jpg 1200w\" alt=\"\" width=\"571\" height=\"326\" \/><\/a><\/div>\n<div>\n<h2>Specifications<\/h2>\n<ul id=\"result_box\">\n<li><span id=\"result_box\"><label>Type of Output<\/label>: Adjustable<\/span><\/li>\n<li><span id=\"result_box\">Number of outputs: 1<\/span><\/li>\n<li>Minimum input voltage: 4.2 V<\/li>\n<li>Maximum input voltage: 40 V<\/li>\n<li>Minimum adjustable output voltage 1.2 V<\/li>\n<li>Maximum adjustable output voltage: 37 V<\/li>\n<li><span id=\"result_box\">Output current: 1.5 A<\/span><\/li>\n<li><span id=\"result_box\">Minimum operating temperature: 0oC<\/span><\/li>\n<li>Maximum operating temperature: 125oC<\/li>\n<li>Encapsulated: TO-220<\/li>\n<li>3 pins<\/li>\n<\/ul>\n<h4>WHAT IS A VOLTAGE SOURCE<\/h4>\n<p>A voltage source is a circuit like the one that can provide constant voltage and current. For this purpose the LM317 circuit requires an input voltage source. For example, the difference between the input and output of the LM317 controller should be at least 4.2V and a maximum of 40V.<\/p>\n<p>The LM317 voltage regulator has the characteristic of having a variable configuration. This adjustable source is controlled via variable resistance.<\/p>\n<h4>CIRCUIT LM317<\/h4>\n<p>The LM317 circuit has different configurations to regulate voltage. For example, the most commonly used configuration is that of variable controller from 1.2V to 37V. To achieve this adjustable power supply, it is required to connect the next circuit. This source requires a resistance of 470 Ohm and a potentiometer of 10k. Then, two of the potentiometer terminals will connect to each other (one in the center and one edge). These connections will be attached to the resistor terminal and the controller adjustment pin. Also the other terminal of the potentiometer is grounded as well as the ground of the input source. The regulated voltage output (the center pin) is connected to the 1k resistor terminal. Finally, the positive of the input source is connected to pin 3. The following figure shows the resulting circuit.<\/p>\n<h4>Circuit<\/h4>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/diagrama.png\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-5209\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/diagrama.png\" sizes=\"(max-width: 589px) 100vw, 589px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/diagrama.png 589w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/diagrama-300x154.png 300w\" alt=\"\" width=\"589\" height=\"302\" \/><\/a><\/p>\n<\/div>\n<h3>Materials:<\/h3>\n<div>A heatsink<\/div>\n<div><\/div>\n<div><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/disipador.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5202\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/disipador.jpg\" sizes=\"(max-width: 265px) 100vw, 265px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/disipador.jpg 450w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/disipador-150x150.jpg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/disipador-300x300.jpg 300w\" alt=\"\" width=\"265\" height=\"265\" \/><\/a><\/div>\n<div>Lm317T integrated regulator<\/div>\n<div><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/lm317t.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5203\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/lm317t.jpg\" sizes=\"(max-width: 242px) 100vw, 242px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/lm317t.jpg 444w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/lm317t-300x178.jpg 300w\" alt=\"\" width=\"242\" height=\"143\" \/><\/a><\/div>\n<div>10Kohm Print Potentiometer<\/div>\n<div><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/potenciometro10k.jpeg\"><img loading=\"lazy\" class=\"alignnone wp-image-5205\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/potenciometro10k.jpeg\" sizes=\"(max-width: 197px) 100vw, 197px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/potenciometro10k.jpeg 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/potenciometro10k-150x150.jpeg 150w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/potenciometro10k-300x300.jpeg 300w\" alt=\"\" width=\"197\" height=\"197\" \/><\/a><\/div>\n<div>Male pins in total 4<\/div>\n<div><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/conectores.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5201\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/conectores.jpg\" sizes=\"(max-width: 272px) 100vw, 272px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/conectores.jpg 696w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/conectores-300x200.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/conectores-600x400.jpg 600w\" alt=\"\" width=\"272\" height=\"181\" \/><\/a><\/div>\n<div>0.1 uF ceramic disc capacitor<\/div>\n<div><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/capacitor104.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5200\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/capacitor104.jpg\" sizes=\"(max-width: 245px) 100vw, 245px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/capacitor104.jpg 720w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/capacitor104-300x296.jpg 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/capacitor104-600x592.jpg 600w\" alt=\"\" width=\"245\" height=\"242\" \/><\/a><\/div>\n<div>1 uF x 50 Volt electrolytic capacitor<\/div>\n<div><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/capacitor-1uF.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5206\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/capacitor-1uF.jpg\" sizes=\"(max-width: 188px) 100vw, 188px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/capacitor-1uF.jpg 284w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/capacitor-1uF-150x150.jpg 150w\" alt=\"\" width=\"188\" height=\"188\" \/><\/a><\/div>\n<div>Printed circuit<\/div>\n<div><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/Gerber_lm317_fuente_regulada_20191215160940.zip\"><img loading=\"lazy\" class=\"alignnone wp-image-5204\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pcb-1024x674.png\" sizes=\"(max-width: 217px) 100vw, 217px\" srcset=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pcb-1024x674.png 1024w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pcb-300x198.png 300w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pcb-768x506.png 768w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pcb-600x395.png 600w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pcb-820x540.png 820w, http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/pcb-1320x869.png 1320w\" alt=\"\" width=\"217\" height=\"143\" \/><\/a><\/div>\n<div>Download gerber file\u00a0<a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/Gerber_lm317_fuente_regulada_20191215160940.zip\">Gerber_lm317_fuente_regulada<\/a><\/div>\n<div><\/div>\n<div>LM317T data sheet<\/div>\n<div><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2019\/12\/LMx17.pdf\">LMx17<\/a><\/div>\n<div>\n<hr \/>\n<\/div>\n<div>\n<p>SUBSCRIBE TO OUR NEWSLETTERS, RECEIVE IN YOUR EMAIL THE MOST OUTSTANDING NEWS, JUST BY ENTERING YOUR EMAIL<\/p>\n<p style=\"text-align: left;\">[wysija_form id=”1″]<\/p>\n<hr \/>\n<p style=\"text-align: left;\"><div class=\"page-sidebar widget\" id=\"donation_buttons\"><form action=\"https:\/\/www.paypal.com\/cgi-bin\/webscr\" method=\"post\" target=\"_blank\" ><input type=\"hidden\" name=\"business\" value=\"donacion@rogerbit.com\"><input type=\"hidden\" name=\"bn\" value=\"mbjtechnolabs_SP\"><input type=\"hidden\" name=\"cmd\" value=\"_donations\"><input type=\"hidden\" name=\"item_name\" value=\"Ayuda a RogerBit.com\"><input type=\"hidden\" name=\"item_number\" value=\"www.rogerbit.com\"><input type=\"hidden\" class=\"set_donation_button_amount\" name=\"amount\" value=\"1\"><table ><tbody><tr><td><label for=\"rogerBit necesita de tu ayuda para seguir existiendo :-)\">rogerBit necesita de tu ayuda para seguir existiendo :-)<\/label><\/td><\/tr><\/tbody><\/table><table ><tbody><tr><td><input style=\"margin-top:10px;\" type=\"image\" name=\"submit\" border=\"0\" src=\"https:\/\/www.paypal.com\/en_US\/i\/btn\/btn_donateCC_LG.gif\" alt=\"PayPal - The safer, easier way to pay online\"><\/td><\/tr><\/tbody><\/table><input type=\"hidden\" name=\"currency_code\" value=\"USD\"><input type=\"hidden\" name=\"notify_url\" value=\"https:\/\/rogerbit.com\/wprb\/?Donation_Button&action=ipn_handler\"><\/form><\/div><\/p>\n<hr \/>\n<p><strong>RECOMMENDED VIDEO<\/strong><\/p>\n<p><iframe loading=\"lazy\" width=\"1160\" height=\"653\" src=\"https:\/\/www.youtube.com\/embed\/rGnE0BehiTs?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>In this video we will see how to assemble an adjustable power supply, with the lm317 integrated circuit, and other electronic components. This project is ideal, if you want to put together an economical source, easy to make, and perfect to insert into our protoboard. Included is the printed circuit. The LM317t is a monolithic […]<\/p>\n","protected":false},"author":1,"featured_media":5213,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[648],"tags":[],"_links":{"self":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/5979"}],"collection":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/comments?post=5979"}],"version-history":[{"count":3,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/5979\/revisions"}],"predecessor-version":[{"id":5982,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/5979\/revisions\/5982"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/media\/5213"}],"wp:attachment":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/media?parent=5979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/categories?post=5979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/tags?post=5979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}