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.
The operational amplifier is one of the most versatile and useful components in electronics. The op-amp can be used as an amplifier, attenuator, filter, mixer, comparator, integrator, oscillator, rectifier, peak detector, clipper, and more. So op amps are great building blocks for synth DIY.