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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
My first lunetta box!
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billsship



Joined: Apr 14, 2013
Posts: 18
Location: Arkansas, USA

PostPosted: Thu Feb 27, 2014 5:01 pm    Post subject: My first lunetta box!
Subject description: 4051/40106 and video
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I just wanted to share my first Lunetta invention with everyone here and say thanks for the database of knowledge everyone shares. The Lunetta philosophy is a great way to get into building electronics. Less precise, more experimentation and accidents.

http://www.youtube.com/watch?v=yy0akV62g3k

This was built in a cigar box and used one 4051 and two 40106 chips.
The three selection LFOs use 1Meg pots and 100uF capacitors (~30secs to pretty fast).
The eight audio rate oscillators use 1Meg pots and 1uF capacitors.
The volume pot is 100k. The whole thing runs on a 9v battery. No voltage regulator. If anyone wants a schematic I can put one together. It's the least I can do.

Thanks again! Smile

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billsship



Joined: Apr 14, 2013
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Location: Arkansas, USA

PostPosted: Thu Feb 27, 2014 5:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

Here's a hand-drawn schematic. Hopefully there's no mistakes. I have no background in electronics or engineering so thats my "take" on a schematic.


billsship 4051.jpg
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Schematic for 4051/40106 billsship
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billsship 4051.jpg



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commathe



Joined: Jul 26, 2013
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PostPosted: Thu Feb 27, 2014 7:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

Nice! I have a 4051 kicking about but I never thought of using one like this! Very cool!
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Richarius



Joined: Feb 22, 2014
Posts: 20
Location: Kitchener, Ontario, Canada

PostPosted: Fri Feb 28, 2014 12:59 am    Post subject: Reply with quote  Mark this post and the followings unread

That's a great idea! With a lot of the fast switching of the 3 control BITs on the 4051, it easily gives the auditory illusion of there being more than 1 voice.

That unit, through a 5-10 second reverb, with a nice amount of manually adjustable delay, would give that little guy a monstrous sound on top of what it already has! Great job! Very Happy

The 4051 is a wonderful chip to play with ... in either direction. I was debating at work earlier tonight, just slapping one into a panel with no input / output resistors - so that I could use it either direction: 1 in/8 out or 8 in/1 out. One of the wonderful things about Lunetta machines, is the freedom to do almost anything you want. Smile

I'm going to post a link to that vid., as well as this msg. thread at TS0L. Smile

Thanks for posting the schematic as well - clear and easy to understand for just about anyone. Smile

For speed pots for clocks / oscillators / et cetera, in the Lunetta world, I always slap a 1k resistor in series with the pot, so that nothing can 'bottom out'; causing an oscillator 'stall' / et cetera.
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billsship



Joined: Apr 14, 2013
Posts: 18
Location: Arkansas, USA

PostPosted: Fri Feb 28, 2014 8:58 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the tip. I haven't had any stall yet but I'll keep it in mind.

The video I posted is actually running through a delay pedal, so that might add to the seemingly polyphonic sound. There's an old spring reverb tank on the shelf... I wonder if that'd sound nice?

I like your idea of keeping the 4051 a blank canvas for many uses. I'm planning a modular lunetta build and will do just that - 12 jacks of ins or outs, whatever you want to make it. Plus a mix of vcos, sequencers, filters, etc.

Also, the pot wiring in the schematic is wrong. The first pins aren't connected. I'll have to fix that.

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