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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
NANDulator
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NOISEBOB



Joined: Oct 13, 2019
Posts: 17
Location: NOISE

PostPosted: Sat Oct 26, 2019 2:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
yep, for 'beats' they work great, not so much for tuning.

As for the schematic,. what you've drawn would function as a standard oscillator since pin 1 of the NAND gate is high at all times.
Your input can't really do anything apart from shorting out the supply if the pot is at a very low resistance. You could add a resistor
between pin 1 and +9V in which case it could function as a gated oscillator and the pot might adjust the treshold level a bit.
It wouldn't NANDulate though.


my idea with having a jack in on the first NAND gate is to be able to dignal in an output from the 2nd NAND, and give the input of that NAND a signal from the 3rd NAND, and so on....

and/or have the option of playing all four (or eight) oscillators individually.
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PHOBoS



Joined: Jan 14, 2010
Posts: 4729
Location: Moon Base
Audio files: 642

PostPosted: Sat Oct 26, 2019 3:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

That would be a gated oscillator. I have some in my modular lunetta for which you can find the schematic here

In your case you can replace the switch with a (10K) pullup resistor and leave out the 100K pulldown. Then reverse the diode so it is facing
in the same direction as in your schematic. This way it will oscillate when nothing is plugged in and external signal can halt it (when low).

You could add a potentiometer as a voltage divider to the input but I doubt it would have any effect especially with those schmitt trigger inputs.
It could be useful for analog signals though.

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GlassHausen



Joined: Nov 06, 2019
Posts: 5
Location: Portland, Oregon, USA

PostPosted: Sun Mar 08, 2020 2:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

My first day on the forums and already I've got three new projects to make! It's like finding a magical cave full of treasure! Thanks, PHOBos, for the original post, and thanks to everyone who has contributed. This stuff is amazing!
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