EVERYTHING FOR ELECTRONICS
SPICEing IT UP
I enjoyed your article series on
SPICE simulation. Is there a digital
circuit version of Spice (I've heard of
HSpice) available as freeware? Thanks.
Thank you for the Robot Art article
in the April 09 issue. Here is a photo
of my active "Computer Virus" that I
designed and tried to market back in
the 80s. The circuit detects changes in
voltage fields (i.e., static electricity)
and lights the LEDs either red or green,
depending on the polarity of the
charge. Every component of the
Computer Virus is part of the circuit;
the batteries are located in the base
of the plastic box. No power switch is
required. The device actually is useful
in warning people that they are carrying
a static charge.
Response: Thanks for the kind
words! There are several similar
variations of SPICE; here's a quote from
the Wikipedia entry for SPICE at http://
SPICE inspired and served as a basis
for many other circuit simulation
programs, in academia, in industry, and
in commercial products. The first
commercial version of SPICE was ISPICE,
an interactive version on a timeshare
service, (National CSS). The most prominent commercial versions of SPICE include HSPICE (now owned by Synopsys)
and PSPICE (now owned by Cadence
Design Systems). The academic spinoffs
of SPICE include XSPICE, developed at
Georgia Tech, which added mixed
continued on page 77
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In the March 09 Personal Robotics
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Studios. The actual name is Grand Idea
Studio. Our apologies to Joe.
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