Hex inverter oscillator
Today I dipped my toes into the world of analog synth and created my first oscillator. I based my design on a hex schmitt-trigger inverter chip, more precise the CD40106BE.
I just picked up some components that I had laying around and created the following circuit:
This seemed to produce some decent frequency range that could be usable for music (130 Hz to ~3 kHz).
However when reaching the “end” of the potentiometer it seems like the capacitor is too large and makes the charge time long enough that the signal becomes a triangle wave instead of a square wave.
I have not put this down on the math table yet so the 15 kHz probably correlates pretty well with the capacity of the capacitor I chose.
Since I haven’t built a proper eurorack power supply I for now only have this 4V power supply that I used and I also don’t have any way of playing this into a reasonable strength for headphones and/or sound interface so this small project was only for getting myself started in this. I’ve just recently moved and I want to fix a proper workshop before I start doing some bigger project so I’ll probably start with that before I continue with a power supply and end amplifier. But I hope that I’ll be writing more here soon.