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dome light fade in/out


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minitruckin 
Member - Posts: 2
Member spacespace
Joined: August 21, 2012
Location: Oklahoma, United States
Posted: August 21, 2012 at 12:02 PM / IP Logged  
i really like how my full size truck has dome lights that fade in and out and I would like to do this in my mini truck. I have found the diagram to fade out but nothing to fade in. Any Help?
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: August 21, 2012 at 4:02 PM / IP Logged  
The short answer - apart from commercial offerings - is to use a PICAXE eg, the PIC 08 (or 08M or 08M2), and program it.
hotwaterwizard 
Silver - Posts: 1,350
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Joined: December 11, 2003
Location: California, United States
Posted: August 22, 2012 at 10:20 PM / IP Logged  
dome light fade in/out - Last Post -- posted image.
John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
hotwaterwizard 
Silver - Posts: 1,350
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Joined: December 11, 2003
Location: California, United States
Posted: August 22, 2012 at 10:34 PM / IP Logged  

http://www.whatcircuits.com/light-control-circuits/in-car-lights-with-fade-in-fade-out-effects/

This circuit is simple to build.

The circuit will operate as a nice fade-in fade-out visual effects when switching your in-car lights on and off.

The fading time can be changed by adjusting the charging and discharging times of the capacitor.

To do this, adjust the values of the 10 KOhm and 4.7 MOhm resistors.

BUZ74 is a SIPMOS power transistor (Siemens MOSFET) that can handle up to 500V.

Instead of BUZ74, you can use any other power MOSFET that has a VDS value greater than 50V.

dome light fade in/out - Last Post -- posted image.

John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
minitruckin 
Member - Posts: 2
Member spacespace
Joined: August 21, 2012
Location: Oklahoma, United States
Posted: August 23, 2012 at 11:39 PM / IP Logged  
ok i guess i need to mention i dont know that much about electrical diagrams (or lingo) to comprehend what you are trying to tell me. I do appreciate the assistance, but if you could break it down to little bite size bits so i can follow you, it would be much appreciated. Thank you in advance.
hotwaterwizard 
Silver - Posts: 1,350
Silver spacespace
Joined: December 11, 2003
Location: California, United States
Posted: August 24, 2012 at 9:31 PM / IP Logged  

Sounds Like I should Build the circuit then explain it to you.

John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: August 25, 2012 at 12:34 AM / IP Logged  
HWW, sell not explain, you and Oldie both fell into that one dome light fade in/out - Last Post -- posted image.
rizallionc 
Member - Posts: 23
Member spacespace
Joined: March 14, 2002
Location: Arizona, United States
Posted: September 10, 2012 at 10:53 PM / IP Logged  
hotwaterwizard wrote:

Sounds Like I should Build the circuit then explain it to you.

I want one! How much?
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: September 14, 2012 at 11:47 PM / IP Logged  
My compliments Hotwaterwizard - that's a bluddy good circuit!
Not that I've tried it, but it is certainly simpler than other discrete circuits I have seen or envisaged.
However most inquiries I have seen have been for LEDs (or a mixture of LEDs and bulbs) in which case PWM is the only practical solution, and hence my PICAXE suggestion where a $5 PICAXE 08 plus its 2 programming resistors, input resistors etc, 5V regulator, output MOSFET (or transistor) and "simple" programming can do any dimming rate with whatever delays and trigger(s).
But I reckon one day I'll build that circuit, though I'll probably add an input resistor (1k?) to limit input current if using a grounded switch that feeds some other +12V circuit or load.

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