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Do-It-Yourself (DIY) Question & Answer Forum
Cable resistance and voltage drop
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<blockquote data-quote="Bruspark" data-source="post: 490959" data-attributes="member: 20106"><p>You'll not pass if you stop there lad . . <img class="smilie smilie--emoji" loading="lazy" alt="😀" title="Grinning face :grinning:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f600.png" data-shortname=":grinning:" /></p><p> </p><p> Find Current cable resistance as above</p><p> Calculate required (smaller)<strong> total </strong>cable resistance for 5V rather than 13V drop ( pro-rata will do it)</p><p> Solve parallel resistors formula for a resistance needed in parallel with current resistance to give the required total</p><p> </p><p> That's your lot !!</p><p> </p><p> Although in the real world the current won't stay the same as the voltage changes but hey !!</p><p> </p></blockquote><p></p>
[QUOTE="Bruspark, post: 490959, member: 20106"] You'll not pass if you stop there lad . . 😀 Find Current cable resistance as above Calculate required (smaller)[B] total [/B]cable resistance for 5V rather than 13V drop ( pro-rata will do it) Solve parallel resistors formula for a resistance needed in parallel with current resistance to give the required total That's your lot !! Although in the real world the current won't stay the same as the voltage changes but hey !! [/QUOTE]
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Cable resistance and voltage drop
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