The Synth - Schematics and Infos



Moderator: Ghost Hip

The Synth - Schematics and Infos

Postby Schlatte » Tue Jun 30, 2020 3:46 am

Hi all!
Next up - The Synth! :joy:

It is a small synth with either manual control or modulation via LFO.

Schematic:
Can be downloaded as PDF from my Google Drive: https://drive.google.com/file/d/1rKjPMnOV5-bsueZgq95SsLs1o5HwA-y3/view?usp=sharing
SPOILER : show
Image


Controls are as follows:
LFO Section
-P106 LFO Frequency
-P101 LFO Wave Shape
-S103 LFO Frequency Range
-S203 LFO or manual sweep selector switch
-P103 Sweep Depth in LFO mode, manual sweep in manual mode

VCO Section
-S101 VCO Frequency Range
-P105 VCO Frequency
-P102 Output Filter (LPF)
-P104 Volume

For P105 you can use other pot values but it is important, that the parallel resistance with R108 stays in the same range (~200k).
Here are some combinations that work well:
P105: 250k, R108: 1M
P105: 500k, R108: 330k
P105: 1M, R108: 270k

Tinkering and improvement ideas:
-) Replace the filter section (P105 and C109) with a tone stack, so you can get LPF and HPF going!
-) Add a 5V LDO and run the whole thing on 5V with an LMV324 and 74HC4046. They are more "modern" and you can get them more easily than the "old" stuff that runs on 9V.


If you have any questions or comments, just ask! :snax:
EU People! Tourbox! http://ilovefuzz.com/viewtopic.php?f=286&t=63927

Good Deals with: All these fine people!

MOM-D Shark Tank is back! Open Source Designs for musical pleasure! Back in the Tank! Go check it out!
Schlatte

User avatar
IAMILF
IAMILF
 
Posts: 2666
Joined: Mon Aug 08, 2011 3:27 pm
Location: Austria

Re: The Synth - Schematics and Infos

Postby Dowi » Thu Oct 08, 2020 8:31 am

Just spent lunchtime jamming with The Synth and shot a video of it.
The first part is pure "getting to know" the synth exploring the different waveforms and messing with LFO sweep and filter (with just a bit of delay/reverb here and there); the second part is me messing with a pulsating synth setting and some effects to see what could happen with various combinations. After shooting the videos i've paired it with some dirt pedals too, and it sounded extremely good with a mid-scooped fuzz.

I have basically no experience with drone synths, so i cannot compare it to others. It's pretty aggressive, as you would expect from a single VCO, and I find it very simple and fun, If the modulation rate could go even slower I would appreciate it a lot.
I don't know if I'd prefer a tone control as i like the filter, and it would be even cooler with a resonance knob. Maybe the chance to select it to be a LPF or HPF could be an interesting feature.
Another maybe easy addition could be a momentary switch to easily trigger it manually in a rhythmical way (or maybe a CV in?)

Gonna explore it more in the next few days, some real good work Schlatte!! :omg:

BIRCH BARK | Solo stuff | Bandcamp - Youtube
HIBAGON | Polyrhythmic Heavy Duo | Bandcamp - Spotyshit
Dowi

User avatar
IAMILF
IAMILF
 
Posts: 2496
Joined: Fri Jan 08, 2016 8:12 am
Location: Italy

Re: The Synth - Schematics and Infos

Postby Schlatte » Thu Oct 08, 2020 2:30 pm

:joy:
Glad you dig it!
Thanks for the awesome video and the feedback! Have fun playing some more with it!
EU People! Tourbox! http://ilovefuzz.com/viewtopic.php?f=286&t=63927

Good Deals with: All these fine people!

MOM-D Shark Tank is back! Open Source Designs for musical pleasure! Back in the Tank! Go check it out!
Schlatte

User avatar
IAMILF
IAMILF
 
Posts: 2666
Joined: Mon Aug 08, 2011 3:27 pm
Location: Austria

Re: The Synth - Schematics and Infos

Postby goroth » Tue Oct 27, 2020 7:02 am

I thought it was an expression generator and plugged it into some pedals expression inputs.
It worked.

OTOH I'm glad I didn't fry any pedals.
ALLisNOISE wrote:you can dial in some wonderfully smeared 12bit cascades of cicadas leveling a hail of rockets against an army of rusty box fans!

Latest album out on all streaming services and bandcamp and what not.
Spotify /// Apple Music
My band /// Instagram ///Bandcamp ///
goroth

User avatar
HERO
HERO
 
Posts: 13348
Joined: Wed Jan 25, 2012 3:50 am
Location: Eurothrash: Frozen northern outpost.

Re: The Synth - Schematics and Infos

Postby Schlatte » Tue Oct 27, 2020 1:42 pm

goroth wrote:I thought it was an expression generator and plugged it into some pedals expression inputs.
It worked.

OTOH I'm glad I didn't fry any pedals.

THAT IS NOT THE INTENDET USE, SIR!
but if you didn't turn the volume all the way up on the Synth and the pedals you plugged it into have at least some half decent protective circuitry, you should be alright. :thumb:
EU People! Tourbox! http://ilovefuzz.com/viewtopic.php?f=286&t=63927

Good Deals with: All these fine people!

MOM-D Shark Tank is back! Open Source Designs for musical pleasure! Back in the Tank! Go check it out!
Schlatte

User avatar
IAMILF
IAMILF
 
Posts: 2666
Joined: Mon Aug 08, 2011 3:27 pm
Location: Austria

Re: The Synth - Schematics and Infos

Postby coldbrightsunlight » Wed Oct 28, 2020 5:16 am

goroth wrote:I thought it was an expression generator and plugged it into some pedals expression inputs.
It worked.

OTOH I'm glad I didn't fry any pedals.

:lol: :lol: :lol:
coldbrightsunlight

User avatar
Supporter
Supporter
 
Posts: 13192
Joined: Tue Oct 12, 2010 12:20 pm
Location: UK


Return to MOM-D



Who is online

Users browsing this forum: No registered users and 1 guest


Sponsored Ad. (Please no inflated/repetitive clicking. Thanks!)



ilovefuzz.com is not responsible for user-submitted content. Users participate at their own discretion and risk.