[sdiy] Diffused LEDs tip

[Harry Bissell Jr]

I think that is supposed to be a bad thing, maybe
even not safe. They will run on 60Hz at reduced
output but should have a series capacitor as a
"ballast"
iirc

H^) harry




--- "J. Larry Hendry" <jlarryh at iquest.net> wrote:
> I have been running some for quite a while from 120V
> 60Hz line Ac and using
> them for stage lighting (so I can see stuff when the
> lights are off).  I
> know they are supposed to run at high frequency. 
> But, I have had no
> problems running them this way and just forgetting
> the inverter.  Am I
> totally screwing up?  Anyone else done this?
> 
> Larry
> 
> ----- Original Message -----
> From: <jays at aracnet.com>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Tuesday, July 27, 2004 11:49 AM
> Subject: RE: [sdiy] Diffused LEDs tip
> 
> 
> There are some issues that may make EL technology
> hard to use. They run at a
> high AC voltage. Usually between 80-160 volts so
> they require an inverter.
> These aren't all the expensive. Real problem is that
> some of these are made
> really cheap with minimal bypass and square waves
> which give nasty harmonics
> causing pretty nasty noise. The newer inverters
> usually run above 50 kHz but
> the EL panels are modulated at 150 - 1000 Hz. So
> some additional shielding
> and power supply conditioning may be required to
> keep noise from getting
> into the audio/synth circuits.
> 
> Jay S.
> 
> Bert Schiettecatte <bschiett at etro.vub.ac.be> wrote :
> 
> > Thanks for the tip. I knew about EL but never
> looked into it since I'm
> > looking for a way to mix red, green and blue light
> to create any colour
> > I want.. I haven't found an EL material that does
> all three colours?
> > Also, somebody told me EL is not very bright? I'm
> trying to make a
> > visual effect in the dark so maybe the level of EL
> is adequate...
> >
> >
> > -----Original Message-----
> > From: owner-synth-diy at dropmix.xs4all.nl
> > [mailto:owner-synth-diy at dropmix.xs4all.nl]
> > On Behalf Of J. Larry Hendry
> > Sent: dinsdag 27 juli 2004 14:03
> > To: synth-diy at dropmix.xs4all.nl
> > Subject: Re: [sdiy] Diffused LEDs tip
> >
> >
> > All Electronics often has an assortment of these
> electroluminescent
> > strips (EL).  I see they have one now that is
> 3" x 3.1" catalog
> #
> > EL-8.
> > That's not much bigger than 6cm (where's my
> calculator?). 1-800-826-5432
> > www.allelectronics.com One thing you have to watch
> with them. They are
> > surplus.  If you find what you want, but all of
> them you need.  You
> > cannot always count on them having them later.
> Larry
> >
> > ----- Original Message -----
> > From: <mikael at mikmo.dk>
> > Or what about those light panels used to
> illuminate backlit notebook
> > monitors, sometimes they are really cheap at the
> electronic goldmine,
> > right now i just can't remember what they are
> called, and maybee they
> > are a little on the large side for a 6 cm x 6 cm
> panel.
> > www.goldmine-elec.com
> >
> > Citat "Metzger, Michael A"
> <MAMETZGER at partners.org>:
> >
> > > Best way I've seen to evenly illuminate a
> panel is to is to.....place
> > > it
> > in
> > > front of an illuminated panel. For 6cm x 6cm
> I'd suggest about
> frosted
> >
> > > 4 LED's behind a frosted panel. Then on top
> of that place the panel
> > > you want to
> > light
> > > up. It works best if the final panel is
> frosted or has a pattern on
> it
> > (photo
> > > transparency, etc).
> > >
> > >
> > > ----Original Message-----
> > > From: owner-synth-diy at dropmix.xs4all.nl
> >
> > > [mailto:owner-synth-diy at dropmix.xs4all.nl]On
> > Behalf Of Bert
> > > Schiettecatte
> > > Sent: Sunday, July 25, 2004 5:22 PM
> > > To: synth-diy at dropmix.xs4all.nl
> > > Subject: RE: [sdiy] Diffused LEDs tip
> > >
> > >
> > > I tried something like that a while ago...
> Seems to work, but it is
> > > not easy to really do a uniform lighting.
> Most of the time you still
> > > see the light pattern thrown by the LED
> lens...
> > >
> > > -----Original Message-----
> > > From: owner-synth-diy at dropmix.xs4all.nl
> >
> > > [mailto:owner-synth-diy at dropmix.xs4all.nl]
> > On Behalf Of Tim Heffield
> > > Sent: zondag 25 juli 2004 23:05
> > > To: Synth-Diy
> > > Subject: RE: [sdiy] Diffused LEDs tip
> > >
> > >
> > > You might try putting polished aluminium foil
> on three sides and the
> > > bottom (assuming it is clear acrylic)and then
> light it from the one
> > > side edge without the foil.  You could
> lightly sand the top side or
> > > spray it with the "Glass Frosting"
> spray to evenly diffuse
> the
> > light.
> >
> > > You would have to play with how many LEDs it
> will take to evenly
> light
> >
> > > it.
> > >
> > > --Tim
> > >
> > > -----Original Message-----
> > > From: owner-synth-diy at dropmix.xs4all.nl
> >
> > > [mailto:owner-synth-diy at dropmix.xs4all.nl]On
> > Behalf Of Bert
> > > Schiettecatte
> > > Sent: Sunday, July 25, 2004 4:38 PM
> > > To: synth-diy at dropmix.xs4all.nl
> > > Subject: RE: [sdiy] Diffused LEDs tip
> > >
> > >
> > > Now that we're on the topic, anyone got
> experience designing and
> > > implementing light guides for LED lighting?
> I've been trying to find
> a
> >
> > > cheap way to light a piece of acrylic 6cm x
> 6cm in a uniform way
> using
> >
> > > LED(s). Sort of a light tile ...
> 
> 
> 
> 
>