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Other Modding Discussions on modding things other than cases.

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Old 07-July-07, 10:38 AM   #1 (permalink)
Apex Techie Wannabe
Default Electrical help, Two switches one device

Alright, heres the thing; i'm starting work on doing some stuff with my car. I want to add two sets of meteor LED lights (installed cold cathodes in my brothers car, wanna see how the LEDs would look).

For those who don't know which i'm talking about heres a link , now that has 8 different settings which you select via a push button. I want to keep that BUT along with that i want to make them sound reactive via a stand alone switch (would only turn on the sound reactor).

I also have one of these laying around, i could use this one for both sets of LEDs as it has two outputs (i've used it before on LEDs, it works great).

So, here is what i would LIKE to do. Flip on one switch, first set of meteor lights go on, one push button controls all 8 settings, flip second switch the second set of meteor lights go on, one push button controls all of those 8 settings. Now both set of lights are on. NOW i switch a third switch and BOTH sets of lights go into sound reactive mode.

If thats confusing I'm sorry, and I'll try to explain better if you can tell me which part is confusing.

Any type of wire diagram, crude drawing, links, anything would help thanks guys .
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Old 07-July-07, 10:39 PM   #2 (permalink)
Apex Techie Wannabe
Default Re: Electrical help, Two switches one device

wow, no response yet? Can this not be done? i figured by tonight i woulda had tons of responses.
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Old 07-July-07, 11:43 PM   #3 (permalink)
Apex Master Tech Apprentice
Snake2Snipe's Avatar
Default Re: Electrical help, Two switches one device

Well I am by no means an expert here but i think i have a solution for you. Use a SPDT switch (i believe that is the right type) as the third switch you are talking about. Put it as the first switch on the positive line (+12V I assume is the one being used for this). Have the power going in to the single side such that you will be using the switch to send the power to the side that is selected. Then run power from one of the 2 out poles to the sound sensitive box and run from the other out pole to the other 2 switches. Then all you would have to do would be to run the positive line from the switches all to the positive line for the meteor led arrays and wire the ground(-) end direct from the led array to ground(-).
If you are having problems understanding all or any of this just ask and i can try to explain whatever you dont get.
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Old 08-July-07, 11:18 AM   #4 (permalink)
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Default Re: Electrical help, Two switches one device

I'm just have a tough time trying to picture the setup.

Your saying to wire the spdt switch first have one pole attached to the sound box, the second and third pole attached to the switches for the lights?
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Old 08-July-07, 06:59 PM   #5 (permalink)
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Default Re: Electrical help, Two switches one device

I think you need 2 relays to make it safe, no backfeed
Relays need to have N.O contacts , N.C contacts , Coil, and Load
Connect switch 1 to N.C on relay No 1
Connect switch 2 to N.C on relay No2

Connect switch 3 to N.O and Coil on relay No1 and 2

Connect Light 1 to Load on relay No1
Connect Light 2 to Load on relay No2

As long as switch 3 is not engaged switch 1 and 2 will operate
When switch 3 is engaged it will change from N.C to N.O and switch 1 and 2 is no longer operable
.

If interested I can draw a schematic for you
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Old 08-July-07, 08:29 PM   #6 (permalink)
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Default Re: Electrical help, Two switches one device

............................(to push button switch) ......................................diode
.......................o_________________________ switch_____________>
.................................................. .................................................. ...|
+12v (in) .................................................. ........................................|
_________ spdt (switches between sound and push button) .....................|___+12v out to leds
.................................................. .................................................. ....|
............................(to sound switch) .................................................. |
.......................o____________________ switch _________________> |
.................................................. ................................................di ode

that is basically my design(ignore the excessive periods), to prevent backfeed you could always put a diode on the line right before the 2 lines combine to become the +12v out line. i am not completely sure the diodes are needed because of the way the switches are set up, but they probably would be a good idea either way if you were to use this design.

to set this up for 2 sets of lights you can split the line at the point where i have labeled (to push button switch) into 2 lines and send 1 to one switch and light assembly and the other line to the other switch and light assembly, you would also have to split the line coming out of the sound switch into 2 lines and do the same thing.
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Old 08-July-07, 09:41 PM   #7 (permalink)
Apex Techie Wannabe
Default Re: Electrical help, Two switches one device

Beetleman, i wish i could understand that haha. Snake i think that managed to confuse me even more , I'm sorry guys i didnt mean for this to be this hard.

Let me see if maybe this drawing will raise a few ideas. Basically i have three power sources, one going to each LED and the third going to the sound controller, The line going to all three are on a switch. Then, the output of the sound controller is attached to each switch that will turn on and off the LEDs. (On the same posts that the wires for the LEDs them selves will be on)

Make any sense? Or should i just ditch the idea and live with the 8 effects.
Attached Thumbnails
Electrical help, Two switches one device-wire.jpg  
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Old 08-July-07, 10:06 PM   #8 (permalink)
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BeetleMan's Avatar
Default Re: Electrical help, Two switches one device

Nah it's real easy,I'll draw you a schematic tomorrow...
What you drawed there might work if you turn switch 1 and 2 off before turning 3 on... but then again, being the same source, no harm would be done...
does 1 and 2 have to be independent?

Also you could use a 3 position switch for the 3rd switch...
1. sending power to the 2 switches
2. off
3. sending power to sound activator switch


switch 1 going to light 1
switch 2 going to light 2
switch 3 sound activator going to both sets of lights
switch itself will prevent any backfeed

I'm an AC electrician, and DC is a lil bit different ( only 1 circuit in a car)

Let me ask you this, these push buttons, where are they located?
And will the sound activation override it?
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Old 08-July-07, 10:11 PM   #9 (permalink)
Apex Techie Wannabe
Default Re: Electrical help, Two switches one device

Thanks for clearing that up, i understand everything a lot better now. The lights dont HAVE to be independent, its just one is going to be the front seats the other is going to be the back, so if i could yes i'd rather.

I'm not sure about the pushbutton, i just know thats how the effects work. I think each LED tube plugs into a modular which you then plug the power into and then another cord plugs into it which has the button.

I guess i could order the two lights and start messing around i just wanted some idea of what i was doing before i bought the stuff.

In my drawing, to turn on the sound controller you'd have to have switch 1 and 2 on and then switch the 3rd switch, then make sure that the effects were on steady.
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Old 08-July-07, 11:03 PM   #10 (permalink)
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Default Re: Electrical help, Two switches one device

Well, as i said earlier, I'm a AC guy, and it wouldn't work there...
Not sure how it will react in DC, your switch 1 and 2 will also send power to powerside of switch 3,,,, not a big deal, all the same circuit, but when switch 3 is engaged, it will still get power from switch one and two, which is why i recommend using relays, without it, you will have problems...
And 12vcd relays, are only few bucks.... gimme a day, and I'll draw you a schematic...
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Old 08-July-07, 11:41 PM   #11 (permalink)
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Default Re: Electrical help, Two switches one device

alright thanks beetleman! really apprecaite it
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