FW: Spark disk toy

• To: "'Tesla List'" <tesla-at-pupman-dot-com>
• Subject: FW: Spark disk toy
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Tue, 3 Feb 1998 14:13:43 -0600
• Approved: tesla-at-stic-dot-net

----------
From:  Gary Lau  03-Feb-1998 0954 [SMTP:lau-at-hdecad.ENET.dec-dot-com]
Sent:  Tuesday, February 03, 1998 9:02 AM
To:  tesla-at-pupman-dot-com
Subject:  Spark disk toy

I recently saw a cool toy at a store (something like a Spencer Gifts) in
the mall.  The unit is a disk, about 2 feet in diameter.  The disk is
made of two plates of glass with a small seperation between them.  When
running, sparks appear to originate from the center of the disk and
continuously and randomly shoot outward to the edges of the disk.  The
inside surface of the disk appears to be coated with something that gives
it a pixelated appearance.

Anyone know what might be going on here?  Is this something one could
easily construct, powered by a flyback transformer based power supply?

Gary Lau
Waltham, MA USA

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