{"id":1980,"date":"2026-01-09T13:25:30","date_gmt":"2026-01-09T11:25:30","guid":{"rendered":"https:\/\/sznetwork.systems\/?p=1980"},"modified":"2026-01-09T13:25:47","modified_gmt":"2026-01-09T11:25:47","slug":"%f0%9f%94%8c-diy-usb-load-tester-from-scrap-parts-simple-1a-0-5a-resistor-load-%f0%9f%94%a5%f0%9f%9b%a0%ef%b8%8f","status":"publish","type":"post","link":"https:\/\/sznetwork.systems\/?p=1980","title":{"rendered":"\ud83d\udd0c DIY USB Load Tester from Scrap Parts | Simple 1A \/ 0.5A Resistor Load \ud83d\udd25\ud83d\udee0\ufe0f"},"content":{"rendered":"\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"DIY USB Load Tester from Scrap Parts | Simple 1A \/ 0.5A Resistor Load\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/AoR922NjRA0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><br>In this video, I\u2019m building a <strong>simple USB load tester<\/strong> using only <strong>old, wasted components<\/strong> from my electronics junk box.<\/p>\n\n\n\n<p>A USB load is super useful when you need to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>test USB chargers \ud83d\udd0b<\/li>\n\n\n\n<li>check powerbanks \u26a1<\/li>\n\n\n\n<li>diagnose bad or unstable USB cables \ud83d\udd0c<\/li>\n<\/ul>\n\n\n\n<p>Unfortunately, my old USB load tester died while testing a damaged charger\u2026 so instead of waiting two weeks for a replacement from AliExpress, I decided to <strong>build one myself<\/strong> using what I already had.<\/p>\n\n\n\n<p>\ud83e\uddf0 <strong>What\u2019s inside this DIY USB load:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Old cut-off Xiaomi 1S charger cable<\/li>\n\n\n\n<li>Two resistors (5\u03a9, 5W each)<\/li>\n\n\n\n<li>Simple ON\/OFF switch<\/li>\n<\/ul>\n\n\n\n<p>\u2699\ufe0f <strong>How it works:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1\u00d7 5\u03a9 resistor \u2192 ~1A load at 5V<\/strong><\/li>\n\n\n\n<li><strong>Two 5\u03a9 resistors in series \u2192 10\u03a9 \u2192 ~0.5A load<\/strong><\/li>\n<\/ul>\n\n\n\n<p>With a single switch, I can test devices in <strong>two load modes<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1 amp \ud83d\udd25<\/li>\n\n\n\n<li>0.5 amp \ud83d\udd39<\/li>\n<\/ul>\n\n\n\n<p>No microcontrollers, no displays, no fans \u2014<br>just <strong>pure old-school resistor load<\/strong>.<\/p>\n\n\n\n<p>\ud83d\ude05 <strong>Typical DIY problems included:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Wrong resistor value (1k\u03a9 surprise!)<\/li>\n\n\n\n<li>Burned LED due to wiring mistake<\/li>\n\n\n\n<li>Resoldering everything from scratch<\/li>\n<\/ul>\n\n\n\n<p>Sometimes it really <em>is<\/em> easier to buy a ready-made tester \u2014 but that\u2019s not the point.<br>This project is about <strong>reuse, improvisation, and DIY spirit<\/strong>.<\/p>\n\n\n\n<p>\u26a0\ufe0f <strong>Important note:<\/strong><br>This is a <strong>basic and unprotected load<\/strong>.<br>If you need accuracy or safety \u2014 buy a proper USB load tester.<\/p>\n\n\n\n<p>\ud83d\udc4d <strong>If you enjoy DIY electronics, repairs, and building things from scrap \u2014 subscribe to the channel!<\/strong><\/p>\n\n\n\n<p>\ud83d\udccc Don\u2019t forget to:<br>\ud83d\udc4d Like the video<br>\ud83d\udd14 Subscribe for more DIY &amp; tech projects<br>\ud83d\udcac Comment if you\u2019ve built something similar!<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\ufe0f<strong>Tags:<\/strong><\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">DIYUSB #USBLoad #USBLoadTester #ElectronicsDIY #ResistorLoad #PowerbankTest #USBChargerTest #DIYElectronics #FromScrap #JunkBoxDIY #LowBudgetDIY #TechDIY #Soldering #Repair #ElectronicsProjects<\/h5>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this video, I\u2019m building a simple USB load tester using only old, wasted components from my electronics junk box. A USB load is super useful when you need to:. <a class=\"read-more-link\" href=\"https:\/\/sznetwork.systems\/?p=1980\">read more&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[264,1],"tags":[931,970,976,963,966,972,975,969,973,967,971,968,964,965,974],"class_list":["post-1980","post","type-post","status-publish","format-standard","hentry","category-diy","category-uncategorized","tag-diy-electronics","tag-diy-from-junk","tag-diy-tools","tag-diy-usb-load","tag-electronics-diy","tag-electronics-repair","tag-low-budget-electronics","tag-powerbank-testing","tag-resistor-load","tag-scrap-electronics","tag-usb-cable-testing","tag-usb-charger-test","tag-usb-load-tester","tag-usb-resistor-load","tag-usb-tester-diy"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/sznetwork.systems\/index.php?rest_route=\/wp\/v2\/posts\/1980","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sznetwork.systems\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sznetwork.systems\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sznetwork.systems\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sznetwork.systems\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1980"}],"version-history":[{"count":2,"href":"https:\/\/sznetwork.systems\/index.php?rest_route=\/wp\/v2\/posts\/1980\/revisions"}],"predecessor-version":[{"id":1984,"href":"https:\/\/sznetwork.systems\/index.php?rest_route=\/wp\/v2\/posts\/1980\/revisions\/1984"}],"wp:attachment":[{"href":"https:\/\/sznetwork.systems\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sznetwork.systems\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sznetwork.systems\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}