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.
Almost no modular synth patch can go without the use of a low-frequency oscillator (LFO). So I decided to build one myself to get my hands dirty on building modules for my Eurorack system. It is based on a fairly simple relaxation oscillator circuit.