capacitor question
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=12385
Printed Date: August 17, 2025 at 4:55 PM
Topic: capacitor question
Posted By: eltonr
Subject: capacitor question
Date Posted: April 18, 2003 at 3:14 PM
Hi,
I'm using a 1UF capitor to create a 1/2 second pulse for my keyless entry system. I was only able to find a 50 volt cap. Will this do any damage if i'm using this cap to power to my keyless entry system after I remove switched power to it?
Replies:
Posted By: Cletis
Date Posted: April 18, 2003 at 3:58 PM
I don't think it would be a problem. 50 volts is its maximum charginig voltage.
Posted By: eltonr
Date Posted: April 18, 2003 at 4:00 PM
great.......i don't know alot about caps or resistors......or anything electrical......so what your saying is the voltage that you send into the cap determimes the voltage that's sent out of the cap so no matter what the value of the cap it will still be 12 volts?
Posted By: Cletis
Date Posted: April 18, 2003 at 4:06 PM
correct. the voltage into the cap is actually determined by the entire circuit. A capacitror opposes the flow of current, which is what causes the time delay. The time delay is caused by the amount of time it takes the capacitor to charge and discharge. It doesn't create or change the voltage.
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