two triggers on one relay

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bennybongo87

Member - Posts: 10

Joined: April 17, 2012

Location: United Kingdom

Posted: April 21, 2012 at 5:17 PM / IP Logged

hi there, from reading the previous suggestion i dont know whether to use a capacitor or a reed relay now. i could get either tomorrow so was just wondering what you think would be best. could you please tell me what my best setup would be?

bennybongo87

Member - Posts: 10

Joined: April 17, 2012

Location: United Kingdom

Posted: April 21, 2012 at 5:24 PM / IP Logged

i am an idiot wrote:

https://www.the12volt.com/installbay/forum_posts.asp?tid=114184&KW=bellsracer

bennybongo87

Member - Posts: 10

Joined: April 17, 2012

Location: United Kingdom

Posted: April 21, 2012 at 5:49 PM / IP Logged

just looking at caps and diodes. is http://www.maplin.co.uk/1a-schottky-barrier-rectifiers-46408 the right one and http://www.maplin.co.uk/metallised-polyester-film-capacitors-361 1uf version the correct items. im not sure which diode to pick if not correct selection could you please tell me what to get from this site?

KPierson

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This member consistently provides reliable information

Joined: April 14, 2005

Location: Ohio, United States

Posted: April 21, 2012 at 11:00 PM / IP Logged

How were you triggering the relay before you modified the wiring that is causing the chattering? If you had it set up before to work and the relay didn't chatter I would go back to that and then work from there.

Kevin Pierson

bennybongo87

Member - Posts: 10

Joined: April 17, 2012

Location: United Kingdom

Posted: April 22, 2012 at 4:07 AM / IP Logged

It was set up using reverse polarity method but it always buzzed. It's now just wired directly for now. I would like to use the reverse polarity method again so I can get a positive output so I can trigger my foglights. It works perfectly but don't want the buzzing noise when the lights are dimming..

bennybongo87

Member - Posts: 10

Joined: April 17, 2012

Location: United Kingdom

Posted: April 22, 2012 at 5:22 PM / IP Logged

KPierson wrote:

It depends on many different factors. I will make some assumptions here.....

I assume that your fog light switch is a (+) and that relay 2's coil is permanently grounded.

I assume your footwell lighting has the (+) side switched meaning it is permanently grounded.

If these assumptions are correct you can take the (+) voltage out of the contacts of Relay 1 and connect it to the coil wire on Relay 2 THROUGH a 1A diode with the stripe closer to the relay. You will need to remove the fog light trigger and run it through a 1A diode as well, again stripe facing relay.

The diodes will prevent backfeeding from one source to the other.

I am going to use this method but also use a capacitor to stop the buzzing of relay 1. Could you please tell me what legs of the relay I need to put the capacitor across and could you also tell me were the diodes need to be fitted in relation to relay 1 and relay 2 stating which side the stripe is to. Thanks again for everybody's help..

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two triggers on one relay

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