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momentary to constant w/ capacitor


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captainzab 
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Posted: November 03, 2006 at 5:35 PM / IP Logged  
https://www.the12volt.com/relays/page5.asp#mtc
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?
momentary to constant w/ capacitor -- posted image.
yellow thingy is resistor
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hotwaterwizard 
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Posted: November 03, 2006 at 6:00 PM / IP Logged  

what are you doing? You only need a capacitor if you are going from Constant to Momentary.

momentary to constant w/ capacitor -- posted image.

John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
hotwaterwizard 
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Posted: November 03, 2006 at 6:11 PM / IP Logged  

Here is an easier diagram of the same thing.

momentary to constant w/ capacitor -- posted image.momentary to constant w/ capacitor -- posted image.

John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
captainzab 
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Posted: November 04, 2006 at 8:31 PM / IP Logged  
my bad, i meant pulsed to steady, for my turning lights.
how am i suppose do place the resistor?
is my first picture correct?
or do i not need a resistor?
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hotwaterwizard 
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Posted: November 04, 2006 at 8:36 PM / IP Logged  

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.
 
momentary to constant w/ capacitor -- posted image.

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.

John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
hotwaterwizard 
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Posted: November 04, 2006 at 8:58 PM / IP Logged  
hotwaterwizard 
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Posted: November 04, 2006 at 9:06 PM / IP Logged  

Why not put an extra  wire on the flaser input instead?

momentary to constant w/ capacitor -- posted image.

John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
captainzab 
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Posted: November 04, 2006 at 10:49 PM / IP Logged  
can i use a smaller capacitor without resistor?
say 1k uf?
i have to use relay, because im useing pulse from turning lignal to turn on the side lights on my bumper. (the lights does not work not, there is no wires going to it)
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hotwaterwizard 
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Posted: November 05, 2006 at 12:33 PM / IP Logged  

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                                momentary to constant w/ capacitor -- posted image.     and    momentary to constant w/ capacitor -- posted image.

Check out these links to find out more.

http://en.wikipedia.org/wiki/RC_circuit

http://www.antonine-education.co.uk/Electronics_AS/Electronics_Module_1/Topic_10/topic_10__rc_networks_with_dc.htm

John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

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