Part 2. In this post we explore using the Quad NAND CMOS chip as an oscillator. This is actually a pretty simple circuit. We use the aforementioned CD4093 chip. All we need to add is a capacitor and a matching resistor to generate a square wave Lunetta style.
In this series, we build a simple LFO module for Eurorack. In the previous step, we designed a dual LED indicator circuit. This will show us the polarity and relative position of the triangle wave. Let’s put it on the breadboard to see if it actually works.
In this series, we build a simple LFO module for Eurorack. After an initial design phase, we’re now ready to test it on the breadboard to see if it actually works. We only need a handful of easy to find components to build a single LFO based on a relaxation oscillator.