Hi,

EL sheets needs high voltage AC signal from 200Hz - 500HZ 40Vrms to
200Vrms. You can increase the brightness by increaseing the voltage or
frequency. Typical current for 1sqcm EL at say 80Vrms 200Hz is about 0.05mA
and 80Vrms 400Hz is about 0.09mA.

You can generate this from a 555 chip 1:25 audio transformer or you can use
one of the following EL driver chips (Most of these chips work from 0.9V).

SIPEX    DP4428, DP4425, DP4424, DP4423 DP4422 DP4415 DP4415 DP4414 DP4412
NPC      SM8142 SM8141 SM8140
DUREL    D361 D555

Regards,

Jay






At 19:30 19/11/01 +0000, you wrote:
>Hello,
>
>Has any one a schematic, as simple as possible, for an
>EL backlight converter. (from 5v to approx. 90v)
>
>grtz,
>
>
>Simon
>
>
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