momentary to constant w/ capacitor
Printed From: the12volt.comForum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=85083
Printed Date: July 12, 2025 at 4:15 AM
Topic: momentary to constant w/ capacitor
Posted By: captainzab
Subject: momentary to constant w/ capacitor
Date Posted: November 03, 2006 at 5:35 PM
where would i buy the capacitor need?
also, how would i place the resistor inline with the capacitor?
why does the picture show ground?
am i interpreting this right?
yellow thingy is resistor
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Note: You Always Dont Get What You Pay For.
Replies:
Posted By: hotwaterwizard
Date Posted: November 03, 2006 at 6:00 PM
what are you doing? You only need a capacitor if you are going from Constant to Momentary.
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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: hotwaterwizard
Date Posted: November 03, 2006 at 6:11 PM
Here is an easier diagram of the same thing.
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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: captainzab
Date Posted: November 04, 2006 at 8:31 PM
Posted By: hotwaterwizard
Date Posted: November 04, 2006 at 8:36 PM
| Pulsed to Steady Output |
| If you have cornering lights and want them to come on only when your turn signal is on and you do not have a steady output, use the following for each side. This will give you a steady output while the turn signal is on. Increasing the size of the capacitor will give you a longer output if needed. |
The Capacitor and Resistor form what is called an RC Network or Resistor Capacitor Network. To put it in easy to understand terms it is a time delay. It holds the voltage for a set period of time causing the circuit to stay on durring the flash period. The capacitor is rather large and can be bought at Mouser Electronics, Digikey, or maybe even Radio Shack.
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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: hotwaterwizard
Date Posted: November 04, 2006 at 8:58 PM
Posted By: hotwaterwizard
Date Posted: November 04, 2006 at 9:06 PM
Why not put an extra wire on the flaser input instead?
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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: captainzab
Date Posted: November 04, 2006 at 10:49 PM
Posted By: hotwaterwizard
Date Posted: November 05, 2006 at 12:33 PM
Here is how it works. The capacitor charges up and the resistor bleads off the charge at a certain speed according to the values of each one. If either one is a different size it will drain at a different speed.
So the answer in both cases is NO 
and 
Check out these links to find out more.
https://en.wikipedia.org/wiki/RC_circuit
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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !