piclist 2002\12\14\073543a >
Thread: Backlight powering from wall outlet?
www.piclist.com/techref/power.htm?key=power
picon face BY : Jason Harper email (remove spam text)



Aaron wrote:
> I'm planning on a bridge rect with filter cap to get 120V DC, then
> (using a pic of course), PWM @ 400 Hz an NPN (MPSA42) controlling the
> 120V.

This isn't going to work.  An EL panel is effectively a capacitor: pulsed
DC will give you a brief flash of light as the capacitor charges, but after
that you'll get nothing.  You could try putting a resistor across the panel
to discharge it between pulses, but it would be better to use an H-bridge
to get the required reversal of current flow, or a half-bridge switching
one side of the panel between +HV and -HV (with the other side groudned).
       Jason Harper

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics

seeking: static sensitive
<200212140734_MC3-1-1FAC-7443@compuserve.com> quoted-printable

See also: www.piclist.com/techref/power.htm?key=power
Reply You must be a member of the piclist mailing list (not only a www.piclist.com member) to post to the piclist. This form requires JavaScript and a browser/email client that can handle form mailto: posts.
Subject (change) Backlight powering from wall outlet?

month overview.

new search...