| Author |
 Topic  |
|
|
Mysticle31
Apprentece
USA
13 Posts |
 Posted - Oct 17 2007 : 02:33:56 AM
|
I modified my stock lighting circuit. This is more complex than just what I'm showing you, if there is no good reason why the relay buzzes with just what I have here, I can draw up the rest. All it is is another relay hooked in the mix parallel to control other exterior lights when the switch is in the red position. I didn't think it matterd to the buzz, so I didn't draw it.
Basically this is what I have. Forgive the sloppy hand writing. I know some of you can do a better job with your mice than I can with my digitizer.
Anyhow. When the switch is in the Blue position the DPDT relay buzzes. When the switch is in the green position the circuit is complete, light turns on. When the switch is in the red position and the door is closed (incomplete circuit, just like the blue position) the relay buzzes. When the door is opened and the circuit is completed the relay clicks over and completes the circuit and the light turns on.
My question is, why does the relay buzz when the circuit is incomplete?
|
|
|
Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
Posted - Oct 17 2007 : 02:40:24 AM
|
| Your relay buzzes because when the blue switch is closed you are putting the lights in series with the coil which goes to GND. The NC connection is grounded so when it energizes the coil it disconnects when it is on the V+ position then it springs back and reconnects and this cycle will keep on going... |
Edited by - Binary 1011001101 on Oct 17 2007 02:45:19 AM |
 |
|
|
Mysticle31
Apprentece
USA
13 Posts |
Posted - Oct 17 2007 : 04:40:03 AM
|
Oh Oh! I didn't even see it! I had an idea to try and fix it buy putting a SPST relay and hooking one side it's coil to +12 and the other side of it's coil to the bulbs where the DPDT relays coil grounds. Then it would interupt the +12 on the switch side of the DPDT relay, but I see now that will not work. I can't try something similar with the negitive on the switch side of the DPDT either. Any suggestions on how I fix this? It seems I've created a paradox.
I could simply move the ground of the DPDT relay's coil below the red connection, but that would stop me from disabling the circuit that I added.
|
|
|
|
Mysticle31
Apprentece
USA
13 Posts |
Posted - Oct 17 2007 : 04:56:14 AM
|
| Upon further thought, that doesn't really work either. I've worked myself into a pickle here! |
|
|
|
Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
Posted - Oct 17 2007 : 4:49:03 PM
|
| I'm confused, what are you trying to do? Got a further explanation? |
|
|
|
Mysticle31
Apprentece
USA
13 Posts |
Posted - Oct 17 2007 : 8:41:00 PM
|
What I'm trying to do is to make: The dome light and parking lights turn on when my door is open and the switch in the red position. The dome light and parking lights to remain off when the switch is in the blue position. The dome like to be on and the parking lights off when the switch is in the green position.
Here is how I have it wired right now.
I've tried mounting relays to control when the the blue wire is connected to the green wire and reversing the "switch" +12 and ground connections on the DPDT relay.
I'm not yet familiar with N/C terminology. |
|
|
|
Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
Posted - Oct 18 2007 : 02:28:18 AM
|
quote:
Originally posted by Mysticle31
The dome like to be on and the parking lights off when the switch is in the green position.
I can't quite see how that can happen when both bulbs are in parallel, they would come on at the same time. . |
Edited by - Binary 1011001101 on Oct 18 2007 02:29:36 AM |
|
|
|
Mysticle31
Apprentece
USA
13 Posts |
Posted - Oct 18 2007 : 02:36:30 AM
|
| Oh, no the two bulbs are my dome lights. They work as one bulb. The relay on the right with the two loopy blue wires going to it control ground to the relays that turn on the exterior lights. |
|
|
|
Mysticle31
Apprentece
USA
13 Posts |
Posted - Oct 18 2007 : 5:18:01 PM
|
Ok, I found an old program I used many years ago for playing with circuits. I found a solution that seems to work. If you have any others, please suggest them.
The two problems I see with it are:
1) the DPDT relay's coils are charged most of the time (ie door closed, lights in the setting where they will come on when the door is opened). Is that OK?
2) the coils on the relays are going to use up battery power. Should I worry about it? Perhaps a solar charger thrown on the dash can compensate?
Also, will my dome like be slightly on like that?
I realize my diagram is using +9 and cars use +12. |
|
|
|
Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
Posted - Oct 18 2007 : 5:47:43 PM
|
For some reason I am having great difficulty getting my head around this, without knowing I can only give these suggestions:
It does not matter if the relay is energized for most of the time...
Yes it will drain the battery but it depends how long you leave it without starting your car and how much it draws. Personally I wouldn't advise it, also a solar charger ummm well, I don't know about that one...
Try to design one where the relays are turned off when the ignition is not on, or when it is inactive...
As long as your lights and relays have an operating voltage of 12V it will work at 12V
|
Edited by - Binary 1011001101 on Oct 18 2007 5:51:58 PM |
|
|
|
Mysticle31
Apprentece
USA
13 Posts |
Posted - Oct 18 2007 : 7:58:56 PM
|
Well, here is exactly what I'm trying to do. I haven't done a very good job at explaining it.
This is my stock interior lighting circuit
The left most switch controls weather the light is on, or on only when the door is opened.
The right most switch is the door switch.
This is what I have done.
This will turn on my exterior reverse and parking lights (at the bottom of the diagram) when the interior light is on.
I'm trying to make is so:
when the switch is in the blue position, only the interior light is on.
when the switch is in the red position, the interior light and exterior lights come on when the door is opened. |
|
|
|
Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
Posted - Oct 19 2007 : 03:16:21 AM
|
Yay... I see now...
You have a relay to switch the bottom two relays. I don't think you need the bottom relays, all you need is a relay that can handle the current of the two bulbs... |
|
|
|
Mysticle31
Apprentece
USA
13 Posts |
Posted - Oct 20 2007 : 3:43:58 PM
|
Oh yes, your right. I didn't think about that. I was trying to work on making the buzzing go away :). I think I found a bit of a compromise by using the ignition switch.
When the ignition is off the light and exterior lights will turn on with the door and when the light switch is in the blue position
When the ignition is on the light itself comes on with the switch in either position.
Thanks! |
|
|
|
Binary 1011001101
Nobel Prize Winner
United Kingdom
569 Posts |
Posted - Oct 20 2007 : 5:51:30 PM
|
quote:
Originally posted by Mysticle31
When the ignition is off the light and exterior lights will turn on with the door and when the light switch is in the blue position.
Yep that sounds good.
Although having the light on when the ignition is on might not be needed, but that's up to you... |
Edited by - Binary 1011001101 on Oct 20 2007 5:55:52 PM |
|
|
| |
Topic |
|
about +12 relays, why does my relay buzz?
