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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
Analogic!
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JingleJoe



Joined: Nov 10, 2011
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PostPosted: Mon May 07, 2012 1:57 pm    Post subject: Analogic!
Subject description: An old device recombobulated with a 4051 ANY gate
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The video! It explains all, watch it with your eyes and listen to it with your ears.
The basic architecture of this device is this:
Code:

3 oscillators ---> {ANY gate} ----> resonant filter ----> out.
LFO ------------> {ANY gate}

I called it the Analogic Multiplex because its partially logic/digital but it has so much analogue stuff in there too! Wink

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Draal



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PostPosted: Mon May 07, 2012 4:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

I like small units like this. They are cool on their own and can be part of a bigger orchestra of self contained units. Options, options Cool .
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JingleJoe



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PostPosted: Tue May 08, 2012 6:32 am    Post subject: Reply with quote  Mark this post and the followings unread

Draal wrote:
I like small units like this. They are cool on their own and can be part of a bigger orchestra of self contained units. Options, options Cool .

Yes indeed! I can imagine a rack full of devices like this bleeping in conjunction; either making a symphony or a cacophony Laughing

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JingleJoe



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PostPosted: Tue May 08, 2012 1:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

While looking for the schematics for a different device I found the schematics for the analogic multiplex and by lucky coincidence the schematics for the other device were scrawled on the back! Very Happy

This circuit is the basis of the above device, however the above contraption also has a VCF and the LFO is light controlled too. The tri-PWM LFO control switch on the Y inputs was a bit ineffective because the triangle of the LFO is so small and biased up about two fifths of the supply, however it does make some noticeable change in sound but only just. I'd rather just use the PWM LFO and pull down resistors in place of the triangle output if I did this again.
You could amplify the triangle wave and remove the offset with a differential op amp amplifier though Wink

Overall circuit output is from the X output of the 4051, buffering it is advised but not allways necessary. All component values can vary alot, change oscillator capacitors to change overall frequency range.

LCO stands for Light Controlled Oscillator by the way Smile


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JingleJoe



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PostPosted: Mon May 14, 2012 12:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

This one is now for sale Very Happy Get it while it's still hot off the soldering iron!
Ye Threade of Ye olde Sale

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

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aerogramma



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PostPosted: Mon May 28, 2012 10:41 am    Post subject: Reply with quote  Mark this post and the followings unread

another great device?

how did you go about on the led controlled lfo?

cheers!
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JingleJoe



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PostPosted: Mon May 28, 2012 1:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

aerogramma wrote:
another great device?

how did you go about on the led controlled lfo?

cheers!

I think perhaps there was some sort of gramatical error there Laughing LEDs control nothing, the LFO controls the sound and the LED. LEDs are just an output transducer- turning electrons into photons.

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aerogramma



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PostPosted: Mon May 28, 2012 1:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

ah yes sorry about that!.. I went ahead of myself, I'm thinking of an LDR controlled LFO, a pulsating led controlling lfo speed Smile
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JingleJoe



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PostPosted: Mon May 28, 2012 1:57 pm    Post subject: Reply with quote  Mark this post and the followings unread

aerogramma wrote:
a pulsating led controlling lfo speed Smile

You can get flashing LEDs though which could be used to make a really crude LFO with no frequency control, now thats what I'd call ramshackle Laughing

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