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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Let's see your Lunetta!
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commathe



Joined: Jul 26, 2013
Posts: 42
Location: Beijing

PostPosted: Sun Aug 25, 2013 6:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

Noob question: What is with the external ground connections I keep seeing on a lot of people's output mixers?
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macumbista



Joined: Sep 12, 2007
Posts: 360
Location: berlin
Audio files: 3

PostPosted: Mon Aug 26, 2013 4:18 am    Post subject: Reply with quote  Mark this post and the followings unread

commathe wrote:
Noob question: What is with the external ground connections I keep seeing on a lot of people's output mixers?


It's a good question to ask! If you have a coupe different cases, run on a couple different power supplies, you would need to connect their grounds together somehow in order for them to pass signals between each other.

If both cases are connected to the same audio mixer via a grounded jack cable, for example, problem solved. However, maybe one case doesn't have jack outputs, perhaps because it's only a sequencer without audio output. Dedicated ground connections would be handy in such a situation.

This is pretty much a banana-specific thing, EuroRack and other formats solve it by (redundantly) grounding every single cable.

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commathe



Joined: Jul 26, 2013
Posts: 42
Location: Beijing

PostPosted: Mon Aug 26, 2013 6:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

Fantastic! I had been really confused about this but it now makes so much sense. I was just seeing a jack that had nothing it could connect to and getting confused but I didn't think about having more than one modular playing nice together.
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granoj



Joined: Jan 31, 2012
Posts: 6
Location: Finland

PostPosted: Wed Aug 28, 2013 5:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

this is so EPIC, love the use of piezos
sndbyte wrote:
There is no amp in this video, just 2 piezo discs, so use headphones.

2 LFOs made with a 4069 CMOS IC. One is driving a photocell which is connected to a 40106 oscillator. This is then gated using a 4066 CMOS analogue switching IC (the other LFO is controlling the gate). The output is then sent to 2 piezo discs which is why the volume is so low.

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Dogenigt



Joined: Oct 25, 2009
Posts: 37
Location: Denmark
Audio files: 4

PostPosted: Thu Jan 16, 2014 7:17 am    Post subject: Reply with quote  Mark this post and the followings unread

ARISTOTELES - work in progress. more to come in near future at www.dogenigt.com

Posted Image, might have been reduced in size. Click Image to view fullscreen.

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PHOBoS



Joined: Jan 14, 2010
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Location: Moon Base
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PostPosted: Thu Jan 16, 2014 8:28 am    Post subject: Reply with quote  Mark this post and the followings unread

looks great Very Happy
I like the combination of the type of knobs, banana jacks and those lovely red pushbuttons you used.

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JingleJoe



Joined: Nov 10, 2011
Posts: 876
Location: Lancashire, England
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PostPosted: Wed Jan 22, 2014 3:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

I have an observation of a problem I would like to share: this thread is depriving this forum of lots of new topics, the very lifeblood of a forum, because the purpose of the lunetta forum is basically to see your lunettas.
The above lunetta-synth is a perfect example, it could have it's own thread with lots of discussion about the circuits, which would be more easy to find but instead it's hidden away in this thread, much harder to find than a dedicated topic an as such it'll probably go unseen by many who'd like to see it.
TL;DR this thread is pointless because one of the purposes of the already existing lunetta forum, is to show people your lunetta.

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wackelpeter



Joined: May 05, 2013
Posts: 19
Location: germany
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PostPosted: Thu Mar 20, 2014 11:53 am    Post subject: Reply with quote  Mark this post and the followings unread

well this is nothing special just a 4093 schmitt Trigger giving the main clock signal then divided via 4024 and then several Outputs fed into another schmitt trigger again to trigger my ms20, 2 other outputs into an 4030 OR gate feeding with its output together with a divided sequence of the clock a 3rd schmitt trigger thus controlling the LPF and and other divided clock signal controlling the HPF...

makes a nice and cheap (3-4 Euro for electronic components, the pot is the most "expensive" component there) pattern Generator... then with a second clock input things become more chaotic... i'm thinking of building this into a box and keeping it almost patchable including spdt to bybass one source on the schmitt Triggers Inputs...

another nice thing would be converting these signals to triangle or ramp for filter Controlling...

here's a short sample...
simply White noise & squarwave... other Outputs could also control the s&h function... no effects and sorry for the bad Quality it's recorded through the microphone input of my laptop..


cmos_0.mp3
 Description:
simple cmos pattern generator

Download
 Filename:  cmos_0.mp3
 Filesize:  1.75 MB
 Downloaded:  37 Time(s)


cmos2_0.mp3
 Description:
another sample of this simple pattern generator

Download
 Filename:  cmos2_0.mp3
 Filesize:  1.34 MB
 Downloaded:  37 Time(s)

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Dogenigt



Joined: Oct 25, 2009
Posts: 37
Location: Denmark
Audio files: 4

PostPosted: Sun Apr 06, 2014 4:14 pm    Post subject: Reply with quote  Mark this post and the followings unread

JingleJoe wrote:
I have an observation of a problem I would like to share: this thread is depriving this forum of lots of new topics, the very lifeblood of a forum, because the purpose of the lunetta forum is basically to see your lunettas.
The above lunetta-synth is a perfect example, it could have it's own thread with lots of discussion about the circuits, which would be more easy to find but instead it's hidden away in this thread, much harder to find than a dedicated topic an as such it'll probably go unseen by many who'd like to see it.
TL;DR this thread is pointless because one of the purposes of the already existing lunetta forum, is to show people your lunetta.


Sure, I'll definately give her a thread of her own she's done! Smile

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mosc
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Joined: Jan 31, 2003
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PostPosted: Mon Apr 07, 2014 2:32 pm    Post subject: Reply with quote  Mark this post and the followings unread

JingleJoe wrote:
I have an observation of a problem I would like to share: this thread is depriving this forum of lots of new topics, the very lifeblood of a forum, because the purpose of the lunetta forum is basically to see your lunettas.
The above lunetta-synth is a perfect example, it could have it's own thread with lots of discussion about the circuits, which would be more easy to find but instead it's hidden away in this thread, much harder to find than a dedicated topic an as such it'll probably go unseen by many who'd like to see it.
TL;DR this thread is pointless because one of the purposes of the already existing lunetta forum, is to show people your lunetta.


That's a great point! Closing the thread is probably not the best way to handle this problem. I suggest that people who post here do create another topic for their Lunettas. People that see an interesting Lunetta an request that a dedicated topic be posted with more details and the opportunity for more discussion.

Just my thoughts...

thanks

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