Does it dim the light in the room 
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tell me more. is it a red LED with tinted windows?
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clear red with black sharpie . funny it looks completely black when it is off and you can still see red when it is on , hhhhmmmm … 
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That is just genius!
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actually I was just being silly but it might look cool on the " black out " module set .
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Electrons, well, I believe in ‘angry pixies’! 
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This reminds me of a scene in Hitchhiker’s Guide to the Galaxy where they board a completely black spaceship. The interior colour scheme also turns out to be completely black. “Press one of these black buttons and it lights up black to let you know you’ve pressed it.”
The spaceship then starts to dive into the centre of a nearby star, but I forget what happens next.
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Use a security pen and a UV led to light up a written message, art or a symbol? Proper black light then. I just thought of this so no idea if it’s practical… but then I build music stuff and that is never a practical kind of endeavour. Have fun.
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The Electrons as everyone should know were enemies of Dan Dare.
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There are genuinely LED’s that emit Black Light
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I used some dark nail polish to make the LEDs on one of my synths shine less brightly so that I could read the text next to the LEDs when they were lit.
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I’ve got some spare black leds if you need them! PM me 
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You mean DEADs - Dark Emitting Arsenide Diode?!
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Those are probably SBHs (small black holes). I could not find a footprint for those in KiCad or EasyEda though, last time I had a look.
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Hi i have just brought and assembled a few of sams modules, also very very new to modular synthesis, a steep learning curve, just stumbled across these posts, wow brilliant, congrats to everyone who has contributed, gives me great hope for the future.
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@1066brian welcome to the forum, glad it helps 
Don’t hesitate to post the progress of your constructions
hi 1066brian , depending on what modules you have built do a search in past the forum posts there may be some fixes / mods that may apply to your module .
Hi thanks for the information, learning as I go, and most of all having fun.
Thanks again for your reply.
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In particular, the links shown here may be useful:
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