Since the CEM3340 chip was put back into production, and after seeing what a few other makers have built with them, I decided it was time for me to come up with my own take on this ‘tried and true’ chip! I looked over the various designs on using the CEM3340’s and settled on the Octoginta II.
Now that the VCO’s were sorted and I was able to purchase the DIY PCB’s, I needed to choose a wavefolder design. I like what Yusynth did with Haible’s wavefolder and went with his design here:
The YuSynth design required me to make my own PCB’s. This can be a laborious process if you have not done it before. But I have the process down to a science here in the lab, so I was able to get these made pretty quickly. Taste the Sodium Persulfate in the air, aahhhhh!