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digital current meter

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=90964
Printed Date: May 11, 2024 at 6:21 PM


Topic: digital current meter

Posted By: wireless
Subject: digital current meter
Date Posted: February 25, 2007 at 11:30 AM

i need to reduce 12v to 5v in my car. can i do this via a resistor, like done with an LED? or do i need to do something more complex? simple is better.



Replies:

Posted By: wireless
Date Posted: February 25, 2007 at 11:35 AM
sorry guys, please remove this on, a message kept telling me my post was not submitted.



Posted By: fakepete
Date Posted: February 25, 2007 at 11:43 AM
How much current does the meter require?



Posted By: wireless
Date Posted: February 25, 2007 at 4:51 PM
the meter requires 5v to power up and will read up to 30amps.



Posted By: KPierson
Date Posted: February 25, 2007 at 6:14 PM
Grab a 7805 5vdc voltage regulator from Radioshack.

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Kevin Pierson



Posted By: wireless
Date Posted: February 25, 2007 at 8:14 PM
how wold i go about putting that inline on the input side? 12v supply > 7805 5vdc voltage regulator  > meter?



Posted By: KPierson
Date Posted: February 25, 2007 at 8:25 PM

There is an input pin (usually 7-30vdc), a ground, and a 5vdc output.

3 pins, and thats it!



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Kevin Pierson



Posted By: wireless
Date Posted: February 25, 2007 at 8:44 PM

ok, from all the diagram i've been looking at that regulator is usually accompanied by 2 small capacitors on a small pc board, so i didnt know if i could use it on its own or if i have to assemble a small circuit?




Posted By: KPierson
Date Posted: February 25, 2007 at 9:02 PM

The caps will help with the regulation, but if you have a constant input voltage (such as a car battery) and your output isn't constantly changing you should be able to get by without them.



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Kevin Pierson



Posted By: jmelton86
Date Posted: March 14, 2007 at 2:24 AM

wireless, where did you find this meter?



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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001


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