{"id":1645,"date":"2017-05-01T10:54:00","date_gmt":"2017-05-01T00:54:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2017\/05\/01\/color-code-violation-almost-as-bad-as-breaking-ohms-law\/"},"modified":"2025-07-21T11:53:42","modified_gmt":"2025-07-21T01:53:42","slug":"color-code-violation-almost-as-bad-as-breaking-ohms-law","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2017\/05\/01\/color-code-violation-almost-as-bad-as-breaking-ohms-law\/","title":{"rendered":"Color Code Violation — Almost as Bad as Breaking Ohm’s Law!"},"content":{"rendered":"
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A cautionary tale: How would you read the color code on that little resistor? It was plucked from a strip marked 2.2 ohms. And indeed it is red-red-gold. 2.2 ohms, right? But no, my friends. On the DVM it reads 2.2 kilo ohms. 2200 ohms. Believe me, that makes a big difference when it is in the Vcc line of your driver! It took me a while to find out WHY that driver wasn’t driving very well. <\/b>

<\/b> This turned out to be one of those very satisfying trouble-shoots — the problem was elusive and it wasn’t all my fault. But I should have MEASURED the resistor value before soldering it in. <\/b>

<\/b> Here is the scary part: The next resistor from the same strip was marked the same way, but measured 2.2 ohms. Be careful out there.<\/b><\/p>\n","protected":false},"excerpt":{"rendered":"

A cautionary tale: How would you read the color code on that little resistor? It was plucked from a strip marked 2.2 ohms. And indeed it is red-red-gold. 2.2 ohms, right? But no, my friends. On the DVM it reads 2.2 kilo ohms. 2200 ohms. Believe me, that makes a big difference when it is … Continue reading “Color Code Violation — Almost as Bad as Breaking Ohm’s Law!”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":1646,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[],"class_list":["post-1645","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-troubleshooting"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1645","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=1645"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1645\/revisions"}],"predecessor-version":[{"id":1647,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1645\/revisions\/1647"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media\/1646"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=1645"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=1645"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=1645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}