WARNING: ADULT CONTENT
This message may contain graphic depictions of drilling holes,
cutting traces, and the use of non-OEM parts. If frank discussion of
synthesizer modifications offends you, please delete this message now.
Since my system is going to have at least five 800 EG's, it might get
confusing which woosh is which. So I'm thinking of drilling holes
and adding LED's like Moe has on his page:
http://www.hotrodmotm.com/800_mods.htmWhile I'm sure that works (and it says he already tried it right on
the webpage :) I wonder if there is an easier circuit that does not
require adding a perf board. Also, why is the LED in the feedback
path, is that to reduce noise on the ground, or to give the LED a log
response to the output voltage??
The outputs of the 800 already have TL072 as output buffers. The
positive output is divided by two 2K resistors, and the negative
output takes that signal and uses an inverting follower (100K input,
100K feedback) and a 1K output resistor.
If I simply connect an LED between the output and ground that should
give me ~5ma across the LED at 5V. Another way would be to tap the
signal prior to the 1K resistor with another resistor going to the
LED. I'm thinking either of these should work.
I could draw less current from the outputs by driving the LED with a
transistor, but I would like to avoid dangling parts.
Any ideas??