led glow relay circuit design

Im about to Install Led Underglow, and interior accent lighting into a customers car, He wants the interior lighting to be separate from the exterior underglow (thats not the problem) the problem is, he also wants a fader module so when he is at car shows and such all lights fade at the same time rather than different for interior and exterior... my idea is simple, put the interior on one switch, exterior on another, and for the fade module a wireless remote, i just dont know how to hook that up... maybe a relay to make it happen?

Fade them through a common ground connection. I assume the fader is a PWM dimmer/circuit (not a resistive type)?

oldspark wrote: Fade them through a common ground connection. I assume the fader is a PWM dimmer/circuit (not a resistive type)?

the fader is this

http://ledaccentlights.net/store/index.php?main_page=product_info&cPath=11&products_id=195

if that helps

additionally, I dont know if you completely understood my first post... I two switches, one for interior and one for exterior... the point of the switches is so that when he's driving he can choose to turn on only the interior or only the exterior lights... then I need to somehow hook them both up so that when he turns on the fader they both fade... I dont want the fader to work if the lights are turned on (meaning- I dont want the interior to be on solid and the exterior fading or vice versa)

It certainly seems PWM, but whether it is GND or hot switching is unclear. Besides, this thing is always powered, hence you need to pull BOTH int & ext lights off when either is switched "on". EG - each switch through a diode to energise a DPDT relay that takes both lights off the remote and powers them though their respective switch. Are the switches ground switches or hot switches?

oldspark wrote: It certainly seems PWM, but whether it is GND or hot switching is unclear. Besides, this thing is always powered, hence you need to pull BOTH int & ext lights off when either is switched "on". EG - each switch through a diode to energise a DPDT relay that takes both lights off the remote and powers them though their respective switch. Are the switches ground switches or hot switches?

Any Chance You Could come up with A Diagram for This... Also, The I havent decided on what the switches will be, Most Likely A ground Switch though

Just an interim LOL...

zx2ner25 wrote: Any Chance You Could come up with A Diagram for This...

Yep - that's why I asked "what polarity?"....

zx2ner25 wrote: Also, I havent decided on what the switches will be, Most Likely A ground Switch though

Damn - that blew my delaying tactic! Now I have to figure out the solution. AND draw it! LOL! But flexible "polarity" can mean a simpler solution - eg, paralleled ground-switches is equivalent to paralleled +12V switches through diodes. With ground you can omit the diodes! Remind me if I forget to post the solution soon....

It wasn't till I drew the (soft) circuit that I realised a minor detail - it won't work with an SPDT relay unless perhaps that remote dimmer uses BOTH +ve & -ve outputs to control the LEDs/lights. But I suspect EITHER of those outputs is used depending on whether the dimmer is to be on the hot side or gnd side of the lamps (ie, the lamps are not BETWEEN the +ve & -ve outputs). Can you confirm the wiring since that is supplied with the dimmer (I can't find any online diagram)? Otherwise a means of determining when the dimmer is on is required - eh, a current/reed switch that triggers when current rises above the normal standby current, or tapping into something internal that says it is "on" (not merely standby) - maybe a LED?