{"id":780,"date":"2020-04-26T18:54:20","date_gmt":"2020-04-26T18:54:20","guid":{"rendered":"https:\/\/www.adrian-smith31.co.uk\/blog\/?p=780"},"modified":"2020-11-09T17:10:33","modified_gmt":"2020-11-09T17:10:33","slug":"a-constant-current-load-using-mosfet-and-lm358","status":"publish","type":"post","link":"https:\/\/www.adrian-smith31.co.uk\/blog\/2020\/04\/a-constant-current-load-using-mosfet-and-lm358\/","title":{"rendered":"A constant current load using mosfet and LM358"},"content":{"rendered":"<p>In my below post I mentioned that I am building a bench PSU however I am still waiting for the parts to arrive. I decided to make a constant current load in order to test the electronic fuse and the power supply itself. I had built one before but the mosfet kept blowing after a short time and it was difficult to set the current. I had another go and successfully made one that supported a 1 amp load at 12 volts for over an hour without going up in smoke.<\/p>\n\n<div class=\"youtube-embed\" itemprop=\"video\" itemscope itemtype=\"https:\/\/schema.org\/VideoObject\">\n\t<meta itemprop=\"url\" content=\"https:\/\/www.youtube.com\/v\/4SbjAMEZFXo\" \/>\n\t<meta itemprop=\"name\" content=\"A constant current load using mosfet and LM358\" \/>\n\t<meta itemprop=\"description\" content=\"A constant current load using mosfet and LM358\" \/>\n\t<meta itemprop=\"uploadDate\" content=\"2020-04-26T18:54:20+00:00\" \/>\n\t<meta itemprop=\"thumbnailUrl\" content=\"https:\/\/i.ytimg.com\/vi\/4SbjAMEZFXo\/default.jpg\" \/>\n\t<meta itemprop=\"embedUrl\" content=\"https:\/\/www.youtube.com\/embed\/4SbjAMEZFXo\" \/>\n\t<meta itemprop=\"height\" content=\"340\" \/>\n\t<meta itemprop=\"width\" content=\"560\" \/>\n\t<iframe loading=\"lazy\" style=\"border: 0;\" class=\"youtube-player\" width=\"560\" height=\"340\" src=\"https:\/\/www.youtube.com\/embed\/4SbjAMEZFXo\" allowfullscreen><\/iframe>\n<\/div>\n\n<p>I checked online to see if I had got my circuit right and I had but it was just a bad choice of mosfet. I made a video of it as I have plenty of time on my hands due to the lockdown and I&#8217;ve been quite busy finishing projects or finding things to make out of old things I had laying around. A lot went onto ebay and what didn&#8217;t sell I threw out or destroyed for a bit of fun.<\/p>\n<p>When the power supply is done I&#8217;ll post an update on it. There won&#8217;t be much to say as it uses pre built power supply modules but I will be adding some of my own modifications and enhancements such as the abforementioned electronic fuse.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In my below post I mentioned that I am building a bench PSU however I am still waiting for the parts to arrive. I decided to make a constant current load in order to test the electronic fuse and the power supply itself. I had built one before but the mosfet kept blowing after a [&hellip;]<\/p>\n","protected":false},"author":179,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"A constant current load using mosfet and LM358 - Adrian's electronics blog","description":"In my below post I mentioned that I am building a bench PSU however I am still waiting for the parts to arrive. I decided to make a constant current load in ord"},"footnotes":""},"categories":[5],"tags":[],"class_list":["post-780","post","type-post","status-publish","format-standard","hentry","category-projects"],"_links":{"self":[{"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/posts\/780","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/users\/179"}],"replies":[{"embeddable":true,"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=780"}],"version-history":[{"count":2,"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/posts\/780\/revisions"}],"predecessor-version":[{"id":782,"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/posts\/780\/revisions\/782"}],"wp:attachment":[{"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=780"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=780"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.adrian-smith31.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=780"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}