The last D501 NJM2069 VCFVCA modules has now shipped to the USA.
And as promised I wanted to share the schematics and PCB files (KiCAD format) with you.
You can download them here.
The NJM2069 is a fabulous sounding VCF/VCA and I really wish you could still buy these new. not only is a great VCF, but it has a VCA built in and a mixer. It’s a very simple chip to use as well requiring very little in the way of external components. If I could get a good supply of these it would make building poly-synths so much easier!
Anyway, on the PCB you’ll see I bought out the extra pre VCF inputs and the CVs for controlling the levels. Just keep in mind you *must* keep the CVs within -5V to +5V (though they operate from 0V to 5V), going outside of this will damage the chip.
I’ve also added a “Ko-fi” page, so if you feel like buying me a coffee (or in all honesty more likely some chocolate) then you can do so on my ko-fi page here.