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 Forum index » DIY Hardware and Software
A collection of circuits by Nicolas
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LeftyLogic



Joined: Feb 09, 2013
Posts: 9
Location: Paola, KS

PostPosted: Mon Feb 11, 2013 3:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hello everyone, this is my first post here, and I'd like to thank Nicolas for designing all these wonderful circuits! Very Happy I just finished soldering together the Super Simple VCO (My first DIY module) and it sounds fantastic! I'm starting off into Synth-DIY by putting together a simple modular system comprised mostly of modules found in this thread, and I'm loving it so far. Smile

Thanks a million for making all this information easily available!

Regards,
Seth
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-minus-



Joined: Oct 26, 2008
Posts: 787

Audio files: 13

PostPosted: Sat Mar 15, 2014 7:44 am    Post subject: Reply with quote  Mark this post and the followings unread

Just adding the link to the simple but fun bleepy machine, before it gets buried in the catacombs:

http://electro-music.com/forum/topic-61208.html
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civi



Joined: Jun 03, 2014
Posts: 1
Location: Scarborough

PostPosted: Tue Jun 03, 2014 3:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

nicolas, Awesome work and Thanks a lot for this valuable information and now I am busy with your circuits as I just finished the saw tooth oscillator and it worked well so now I am planning to make the VCO.
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MJONES32



Joined: Oct 03, 2015
Posts: 1
Location: Berwyn PA

PostPosted: Sat Oct 03, 2015 10:20 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi, I did build the Super Simple V/Hz , I think pretty close to the schematic,
as described here
http://electro-music.com/forum/topic-34550.html

It sounds good, and the V/Hz is good but not spot on.....is there a tweak that any one can suggest to provide fine control ?
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nicolas3141



Joined: May 25, 2007
Posts: 185
Location: Christchurch, New Zealand

PostPosted: Sun Nov 15, 2015 12:41 am    Post subject: Reply with quote  Mark this post and the followings unread

Having a go at arduino tinkering - http://electro-music.com/forum/topic-65389.html
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steved



Joined: Oct 07, 2015
Posts: 18
Location: usa

PostPosted: Mon Nov 23, 2015 8:01 am    Post subject: Reply with quote  Mark this post and the followings unread

nicolas3141

Thanks you!
I am new to electronics, have been a synth nerd for 30 years-

Your posts are SO helpful!

I was working on finishing your VCF and planned to make an Arduino module next. Perfect timing of this post for me.
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Project_2501



Joined: Jan 31, 2018
Posts: 68
Location: Los Angeles

PostPosted: Wed May 09, 2018 1:17 pm    Post subject: Reply with quote  Mark this post and the followings unread

Did Nicolas ever make a publish/compile a book of his simple diy synth designs from his class he was teaching. I would love to have a paper copy Smile, if there isn't any book, I'm already compiling my own notes/prints of nicolas designs so no worries.
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J-chot



Joined: Jan 20, 2014
Posts: 44
Location: Decatur AL

PostPosted: Tue Sep 25, 2018 2:48 pm    Post subject: stupid question Reply with quote  Mark this post and the followings unread

I feel like I should know the answer to this, especially after trying to find an answer myself with research, buuuut....


If I were to power a LM324n (for THESE specifically) with a Dual 12 v supply,

would I hook -12 to pin 11 and +12 to pin4?
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J-chot



Joined: Jan 20, 2014
Posts: 44
Location: Decatur AL

PostPosted: Tue Sep 25, 2018 4:55 pm    Post subject: Re: stupid question Reply with quote  Mark this post and the followings unread

J-chot wrote:
I feel like I should know the answer to this, especially after trying to find an answer myself with research, buuuut....


If I were to power a LM324n (for THESE specifically) with a Dual 12 v supply,

would I hook -12 to pin 11 and +12 to pin4?


ok, from context clues I think I figured out that Lm324 doesn't work on -12 power?
to use a TL074 instead?

help
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PHOBoS



Joined: Jan 14, 2010
Posts: 5591
Location: Moon Base
Audio files: 705

PostPosted: Wed Sep 26, 2018 6:35 am    Post subject: Reply with quote  Mark this post and the followings unread

LM324 works fine with a dual 12V supply (yes, pins 4 & 11).

If the circuits will work on -/+ 12V depends on a coupe of things. If it is originally powered by -/+9V it should work fine
as long as there isn't anything directly derived from the power. Otherwise some values might have to be adjusted. For example
a reference voltage created wih a voltage divider between +9V/GND would produce a higher voltage if you'd use +12V/GND.

If the circuit is powered from a single +9V supply it could still work on -/+12V but it might need some more adjusting.
Often these circuits have a fake/virtual GND which you can then replace with an actual GND but it might need some other changes.

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Last edited by PHOBoS on Wed Sep 26, 2018 12:19 pm; edited 1 time in total
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J-chot



Joined: Jan 20, 2014
Posts: 44
Location: Decatur AL

PostPosted: Wed Sep 26, 2018 9:34 am    Post subject: Reply with quote  Mark this post and the followings unread

Phenomenal. I got Magic Smoke the other day and I've been questioning everything since. I'll let you know when I successfully breadboard an op amp circuit on my new dual power supply!
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