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change voltage

Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=49561
Printed Date: July 05, 2025 at 12:14 AM


Topic: change voltage

Posted By: IQinstall
Subject: change voltage
Date Posted: February 07, 2005 at 1:52 PM

how do I change 12 volts to 5 volts.

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astro



Replies:

Posted By: haemphyst
Date Posted: February 07, 2005 at 7:32 PM
How much current? How big do you want the interface box to be? Up to about 500ma, you can use a 7905 voltage regulator without a heatsink. Up to one amp, you can use the same device, but a heatsink becomes mandatory. The 7905, available at Radio Shack is catalog number 276-1770, and is less than 2 bux... This is the best way to do it, but if you need more than one amp, you will have to hunt for the 5 amp version... National Semiconductor makes the LM1084 in various flavors...

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."


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