How to make the dome light fade out....
How to make the dome light fade out....
Well, I was looking at my Max the other day at night, with my aftermarket alarm, when I lock the car (activate alarm), the dome light suddenly turns off at the same time that the door locks. Same thing when I open and close the door, dome light quickly goes on and off. I want to know if there is any way I can configure the light so that when I close the door or activate my alarm, the dome light will slowly fade out, and not just turn off quickly. This is on most of the new cars and I think it looks nice, luxurious even. Can anyone help me out? Thanks in advance.
sign Luke? 
Senior Member
Joined: Feb 2001
Posts: 149
try lookin in the audio/electronics section
i somehow remember this coming up before... something about using capacitors to hold enough juice to keep the light on for a bit and then the cap slowly discharges hence the light slowly dims out
i somehow remember this coming up before... something about using capacitors to hold enough juice to keep the light on for a bit and then the cap slowly discharges hence the light slowly dims out
vicodin ... gift of life
Joined: Apr 2002
Posts: 5,399
From: norcal
Originally posted by psu max
try lookin in the audio/electronics section
i somehow remember this coming up before... something about using capacitors to hold enough juice to keep the light on for a bit and then the cap slowly discharges hence the light slowly dims out
try lookin in the audio/electronics section
i somehow remember this coming up before... something about using capacitors to hold enough juice to keep the light on for a bit and then the cap slowly discharges hence the light slowly dims out
Senior Member
Joined: Feb 2001
Posts: 149
i think you need to buy a specific capacitor ... need to use some physics equations along with how long you want the lights to fade.
like i said do a search, im pretty sure there were enough details to figure out whatever else you need to get it working
nadir: hows the computer in your car running? i'm tempted to build one, but am worried that it will just end up being a toy and not really useful
like i said do a search, im pretty sure there were enough details to figure out whatever else you need to get it working
nadir: hows the computer in your car running? i'm tempted to build one, but am worried that it will just end up being a toy and not really useful
Supporting Maxima.org Member
Joined: May 2002
Posts: 1,082
i think any cap will work, i mean, just get the right voltage, but any capacitance is fine, just depends on how fast you want it to discharge.
lights draw a lot of power, 10W or so.
at 10W, a 12V light will last only .0144s on a 1000uF cap, but i bet that is long enough.
F*V^2/W=s
where V is the change in voltage, in this case, 12V-0V=12V
a 1000uF cap should only cost a few bucks though, just wire it properly or it will explode.
lights draw a lot of power, 10W or so.
at 10W, a 12V light will last only .0144s on a 1000uF cap, but i bet that is long enough.
F*V^2/W=s
where V is the change in voltage, in this case, 12V-0V=12V
a 1000uF cap should only cost a few bucks though, just wire it properly or it will explode.
Originally posted by Miasma
i think any cap will work, i mean, just get the right voltage, but any capacitance is fine, just depends on how fast you want it to discharge.
lights draw a lot of power, 10W or so.
at 10W, a 12V light will last only .0144s on a 1000uF cap, but i bet that is long enough.
F*V^2/W=s
where V is the change in voltage, in this case, 12V-0V=12V
a 1000uF cap should only cost a few bucks though, just wire it properly or it will explode.
i think any cap will work, i mean, just get the right voltage, but any capacitance is fine, just depends on how fast you want it to discharge.
lights draw a lot of power, 10W or so.
at 10W, a 12V light will last only .0144s on a 1000uF cap, but i bet that is long enough.
F*V^2/W=s
where V is the change in voltage, in this case, 12V-0V=12V
a 1000uF cap should only cost a few bucks though, just wire it properly or it will explode.
LoL
think any cap will work, i mean, just get the right voltage, but any capacitance is fine, just depends on how fast you want it to discharge.
lights draw a lot of power, 10W or so.
at 10W, a 12V light will last only .0144s on a 1000uF cap, but i bet that is long enough.
F*V^2/W=s
where V is the change in voltage, in this case, 12V-0V=12V
a 1000uF cap should only cost a few bucks though, just wire it properly or it will explode.
lights draw a lot of power, 10W or so.
at 10W, a 12V light will last only .0144s on a 1000uF cap, but i bet that is long enough.
F*V^2/W=s
where V is the change in voltage, in this case, 12V-0V=12V
a 1000uF cap should only cost a few bucks though, just wire it properly or it will explode.
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