Backlit sign: project layout suggestions
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Backlit sign: project layout suggestions

by ecclesiastes on Wed Nov 14, 2012 6:46 pm

Looking for the project parts suggestions.
I have a sign holder: https://ac-order.staplesadvantage.com/i ... gavail_sc7
This is a sign for a microscopy facility, which is supposed to be dark. I want to place microscope instructions into such holders and have them evenly backlit. I'd be very thankful for any suggestions on how to realize that.

Thank you in advance.
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Re: Backlit sign: project layout suggestions

by tastewar on Wed Nov 14, 2012 11:06 pm

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Re: Backlit sign: project layout suggestions

by ecclesiastes on Wed Nov 14, 2012 11:11 pm

Thank you, tastewar. There's a small problem with that - the sign is A4 size. I'm guessing there might be some LED solution as an alternative? But then the problem is how to make the diffuse light without making the whole assembly bulky.
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Re: Backlit sign: project layout suggestions

by adafruit_support_bill on Thu Nov 15, 2012 6:46 am

If you can etch the sign directly into the acrylic, you can edge-light it with a few leds as shown here: http://www.evilmadscientist.com/2008/ed ... day-cards/
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Re: Backlit sign: project layout suggestions

by ecclesiastes on Thu Nov 15, 2012 5:01 pm

Thank you, I think I'll do that for some other signs, but for these instructions it wouldn't look too nice - too much text and there's a need to put a drawing there.
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Re: Backlit sign: project layout suggestions

by adafruit_support_rick on Thu Nov 15, 2012 5:08 pm

You don't necessarily have to etch the instructions into the plexiglass. If you rough-up a sheet of acrylic with sandpaper (or spray some clear satin varnish onto it), it will diffuse the edge-lighting. Put your instructions on a transparency, and they should light up nicely.

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Re: Backlit sign: project layout suggestions

by tastewar on Thu Nov 15, 2012 5:10 pm

Is the room *always* dark? If not, could you put some glow-in-the-dark plastic material behind a cutout sign?
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Re: Backlit sign: project layout suggestions

by ecclesiastes on Thu Nov 15, 2012 5:11 pm

Fantastic, I'll try that. Thank you!
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Re: Backlit sign: project layout suggestions

by ecclesiastes on Thu Nov 15, 2012 5:21 pm

tastewar wrote:Is the room *always* dark? If not, could you put some glow-in-the-dark plastic material behind a cutout sign?


Tastewar, interesting idea. I'm not sure it will glow enough through the paper with instructions printed, but worth trying.
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Re: Backlit sign: project layout suggestions

by tastewar on Thu Nov 15, 2012 6:39 pm

I think what you'd want is your instructions in a "negative" form, basically black paper with the words cut out...
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