Gate LED ckt

[Steve]

Over the weekend I was talking to Paul
S. about all things synth like and he
spewed out a very simple circuit that
will light a LED when given a gate.  I
know this is trivial electronics to
many, however to those of us who love to

make and wish we could engineer these
simple circuits can be a ton of fun in
our projects.  I think it's so sweet, I
want to share it.  Again, this 4
component circuit is a gift from someone
else.  I think it would be very nice if
anyone else has a simple utility circuit
to share would do so.  Here goes:

3904 transistor, 2 resistors and a LED.

E - tied to ground
B - tie to one end of 4.7K resistor.
Other end of resistor to GATE.
C- tie to cathode of LED. Tie anode to
1.5k resistor. Tie other end of
1.5K to +15V

Have fun,
Steve in Hawaii


PS I would like a design for a simple
mixer (say 3 or 4 inputs) to be used for
mixing CV signals.