| This
simple but
efficient Echo
Link interface
measures
9cm x 6cm
and is
designed
on Double
Sided PTH
Board.
Provides
Full
Isolation
between
Rig &
Computer
by using
two audio
transformers
& two
Opto
Couplers.
May be
powered
from DTR
Line by
running a
script on
your PC or
by
supplying
external
12V DC.
This
interface
may be
made
“Self-Powered”
if you run
a script
called
“DTR
on/off”.
Since DTR
is not
used, it
may power
the Opto
coupler
transistors.
However,
interface
may be
powered by
external
12V to get
the same
performance.
Rig
ground is
100%
isolated
from PC
ground using high quality Bourns SMT Transformers and 4N33 Opto
Isolators.
In fact, this is nothing but a Sound Card
Interface with an addition of "COR" isolation circuit.
With
this, I
hope to
see more
amateurs
joining
this
exciting
digital
mode.
|
