Classic 2 Op-Amp tri and square wave VCO - DIY Modular in a Week 1.2

Day 1: VCOs
Part 2: Classic 2 Op-Amp Triangle and Square wave VCO.
Difficulty: Intermediate
Price: ~7$
MiaW playlist: • Modular In A Week (MIAW)
In this episode we make a much more nice sounding module. A classic two opamp design that creates a voltage controllable oscillator that produces both a square wave and a triangle wave output. I found this circuit at a site called allaboutcircuits.com where a Robin Mitchell has a very nice article describing VCO and CV. Much of the designs and information in that article is taken from Rene Schmitz site Schimtzbits.de, so a shoutout to him aswell, for great information and designs.
This build is a little bit more complicated than the first, and depending if you want "exponential CV control" it takes a bit longer to build aswell... As explained in the video ExpCV isnt necessary except if you want to use a CV keyboard or control surface like the BeatStep to control the VCO.
Links to schematics, parts and other relevant stuff:
Link to the All about circuits article and schematics:
www.allaboutci...
Link to the fronpanel design svg file:
www.dropbox.co...
Link to the component spreadsheet:
www.dropbox.co...
Link to ALL the files for all the episodes as they become available:
www.dropbox.co...
Ebay link if you need to buy LM358's
rover.ebay.com...
Ebay link if you need BC548's
rover.ebay.com...
PATREON LINK If you wish to support my work more than just a thumbs up :)
/ sourceryone