oh okay, I’ve never heard of C0G type caps, I am mostly aware of tantalum, ceramic and electrolyte ones. In the VCO I’ve builtin a 1nF film one.
In the store website, they say, they only have a small temperature-dependance and eddy bergmans website says don’t use ceramic caps, but this is the only thing I know.
Thx for asking about the VCO-PCB! Its self-developed with the help of you guys, the AS3340/CEM3340 datasheet, LMNCs long VCO tutorial and eddy bergmans VCO guide:
The red square on the most right picture is the 1nF film timing cap and next to it is the 100nF ceramic timing cap (there, I don’t really care about stability). Other than the AS3340 / CEM3340 chips, I included a bunch of TL074 for signal normalization to 0-10V and offsetting to -5V to 5V to be filtered later easily with the LM13700 state variable filter which I still need to develop. With @analogoutput and @clarionut 's help, I also included a diode circuit to the triangle output of the 3340 to have a sine wave.
I still need to document all this lol