[simpits-tech] backlit panels 101

[Marv De Beque]

If there is a PCB inside the light plate, it is cast into all of the ones I
own.  You can scrape the back of one of them and it is not visible.

Just FYI
-- 


> From: Erwin Neyt <rwntn@hvv.nl>
> Reply-To: simpits-tech@simpits.org
> Date: Wed, 19 Jun 2002 15:13:36 +0200
> To: "'simpits-tech@simpits.org'" <simpits-tech@simpits.org>
> Subject: RE: [simpits-tech] backlit panels 101
> 
>> The light plates are about 0.250" thick.  They are cast
>> acrylic.  Lamps are embedded into the cast and the wiring
>> embedded into the cast, too.  There is a small circular
>> connector embedded into the casting that is 0.250" round. It
>> is a coaxial style that looks a little like the old RCA Phono
>> plugs on stereos, but smaller.  The press into the receptor
>> that is mounted on the back plate.
> 
> I believe this is type IV. In Type V the wiring/bulbs are on a PCB which is
> screwed onto the back of the light plate.
> 
>> The light plates are first painted white, then a coat of
>> black is added to all sides.  I do not know the exact
>> technique to make the letters, but they are probably engraved
>> using a laser or something.
> 
> The black paint is removed with an (photo)etching process.
> 
> Erwin.
> 
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