Switching it on/off is not AC.

BB

On Thu, Nov 19, 2015, at 07:14 PM, Neil wrote:
> Hi Bob,
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> I was suggesting that I'd generate DC with the LED driver and then=20
> switch that on/off rapidly to get the 1KHz-2Khz AC (though square wave).
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> Cheers,
> -Neil.
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> On 11/19/2015 12:46 AM, Bob Blick wrote:
> > Hi Neil,
> >
> > I've experimented a bit with this, and one thing I found is that EL wir=
e
> > really likes AC, like push and pull that is fairly well balanced. DC an=
d
> > chopped DC don't work very well.
> >
> > Best regards, Bob
> >
> > On Wed, Nov 18, 2015, at 08:59 PM, Neil wrote:
> >> So I've got an EL driver that I want to use for a wearable, but it's
> >> bulky for that purpose, and I need something very thin.  Seems the
> >> battery and transformer are the larger parts of the whole driver
> >> module.  I decided to redesign it with a LiPo, but it seems that all t=
he
> >> EL driver circuits I'm finding have transformers.  The EL-wire spec is
> >> 90-120V at 1Khz-2kHz.  Couldn't I use a high-voltage LED driver for th=
is
> >> purpose?  Something like Fig 8 here...
> >> http://www.monolithicpower.com/DesktopModules/DocumentManage/API/Docum=
ent/getDocument?id=3D3473
> >>
> >> I'd still have to throw an oscillator in there to modulate the LED
> >> driver, so I'll have to experiment to see if the LED driver can switch
> >> on/off that quickly.
> >>
> >> Anyone know of a simpler way to do this?  Or maybe even a very thin (s=
ay
> >> few mm tall) transformer that can work for this purpose?
> >>
> >> Cheers,
> >> -Neil.

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