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Acrylic Sheet and edge lighting

 
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darkan99el
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Joined: 21 Sep 2008
Posts: 2
Location: UK

PostPosted: Sun Sep 21, 2008 4:23 am    Post subject: Acrylic Sheet and edge lighting Reply with quote

Hi all, I have a small project I would love to create.

My girlfriend has a Sports car Mazda MX5 Eunos Roadster. It is a softop car and I want to make a windblock in acrylic that lights up around the edges, I will also have, either, some engraved text or maybe even cut out and would love it if this would also be illuminated.

Bit of history regarding the project: my girlfriend looks after disabled children, they think it is very funny to call her smeegal because she has big beautiful eyes. She has recently had the car I had bought her for christmas written off, so I bought the MX5 as a replacement. She told the children about her new car and asked them to give it a name, without batting a eyelash one of the children blurted out 'My Precious' I about fell off my seat. Laughing

The car is now called 'My Precious' and this is the text that I'll have on the acrylic.

So that brings me to now, I wanted to have a logo stuck on the car but thought it a bit tacky and cheap, then I came up with the windblock Idea and it 'kills several birds with one stone', so to speak.

I have a source for the Acrylic, my problem is the illumination, how do I do it and what do I need on my shopping list.

oh by the way I'm thinking Blue leds and powered via the car battery.

Go easy on me people and take it slow Smile

Regards Lee
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Alan
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Joined: 29 Jan 2006
Posts: 1399
Location: Winnipeg, MB

PostPosted: Sun Sep 21, 2008 9:54 am    Post subject: Reply with quote

You need to edge light the display.

Here is an example
http://hackedgadgets.com/2006/04/28/vw-sign-led-upgrade/

To figure out the correct current limiting resistor value all of our LED pages have a link to a resistor calculator to help.
http://alan-parekh.vstore.ca/
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darkan99el
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Joined: 21 Sep 2008
Posts: 2
Location: UK

PostPosted: Sun Sep 21, 2008 11:17 am    Post subject: Reply with quote

Hi thanks for the reply, looking now.

By the way I'm not electronically savvy, but I learn fast, so expect some newbie questions Smile

Ok just been playing with the resistor calculator. Its coming in at 390ohms 1/2 watt. Should I have a higher ohm resistor than the 390ohm and would there be any benefit to this or does it not work like that?

The reason I ask is because as a guide you refer to a 360ohm resistor for: 7 to 14.5 volt application, use a 360 Ohm resistor and with the calculation coming in at 390ohm I would like to know if I should actually be going for the 470ohm resistor?

So the first things on my shopping list are:



What about wiring and type of solder?
What wiring would be suitable for something along the lines of the VW project? is there anything else I will need to at least get a working test block up and running.

PS: The VW project is exactly the look I'm going for. I would probably base the leds at the bottom of the acrylic and probably wire it to come on when the side or headlights are turned on.

We have more dark days here in the UK than light Laughing

Thanks for the help so far.
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Pomz623
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Joined: 12 Aug 2009
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PostPosted: Thu Aug 13, 2009 1:28 pm    Post subject: Reply with quote

Would acrylic be the best? or is plexi better, worse, or just as good?
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Alan
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Joined: 29 Jan 2006
Posts: 1399
Location: Winnipeg, MB

PostPosted: Thu Aug 13, 2009 4:27 pm    Post subject: Reply with quote

Pomz623 wrote:
Would acrylic be the best? or is plexi better, worse, or just as good?


I would think either would work fine.
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Pomz623
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Joined: 12 Aug 2009
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PostPosted: Fri Aug 14, 2009 6:54 pm    Post subject: Reply with quote

and what thickness would work the best. whats the thinest you can go? 1/8?"
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Alan
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Joined: 29 Jan 2006
Posts: 1399
Location: Winnipeg, MB

PostPosted: Fri Aug 14, 2009 8:25 pm    Post subject: Reply with quote

Pomz623 wrote:
and what thickness would work the best. whats the thinest you can go? 1/8?"


That would be about the smallest or else it will get hard to drill the edge holes for the LEDs.
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Pomz623
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Joined: 12 Aug 2009
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PostPosted: Mon Aug 17, 2009 7:53 am    Post subject: Reply with quote

Alan wrote:
Pomz623 wrote:
and what thickness would work the best. whats the thinest you can go? 1/8?"


That would be about the smallest or else it will get hard to drill the edge holes for the LEDs.


Do you have to drill the edges? Or would it work just as good, if you were to place them along the edge. My plan was to use a torch and melt the edges so they are smooth and glossy and them just line up the LEDs around the edges. Or is driller much better>
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