Archive of the former Yahoo!Groups mailing list: MOTM

<<CVmonitor.JPG>>

I came across something in my studio this weekend that I haven't thought
about in years. But since tuning into the MOTM list, I've "met" so many of
you folks who have "LED fever" that this time it caught my eye. I thought
I'd pass this along, so I unplugged it and dropped it in my pocket on the
way to work this morning.

The attached JPEG is a photo of a little doodad that has been sticking out
of one of the jacks on my Korg MS-10 for twenty years or so. I made it for
free from parts lying around based on a mini-article by Craig Anderton back
in an old issue of Polyphony Magazine (which later became EM).

It is a CV/Signal monitor. Basically you just take a tri-color LED (they
were pretty new at the time, very hot stuff) and solder it into a mono �"
plug with a 560-ohm resistor in series with the tip as shown.
(Green-Blue-Brown, 560, right? Don't have my Monday morning coffee yet).

The LED lights green for positive CVs, red for negative, and yellow for
signal (actually the 'yellow' is just a result of the red and green diodes
flashing back and forth quickly... it starts to look yellow even at fast LFO
rates).

What you see in the photo is the one I built, very simple. I used Letraset
press type to label it and sprayed a little fixative on it. It's crooked but
has survived the test of time. I used acrylic paint to label color swatches
and label those, but the white paint seems to have rubbed off over the
years. It looks worse in this magnified view than it does in real life.

So anyway, there you have it. Build at least one. Enjoy! Now you have a
portable fancy LED that you can stick anywhere in your rig! Has Paul come
out with a new module and didn't give you that tri-color LED that you
wanted? Just plug one in! Amaze the family!






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