The final stage of the LFO Eurorack module is the output. This can be tricky. I examine how you can best design an output stage that plays nicely with other modules. Besides that, I also share some of the helpful insights I got from the synth DIY community on the matter.
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 design and build an LFO module for our Eurorack modular synth. No module is really complete without blinkenlights. In this part, we design the LFO indicator light with a red/green dual LED, choose the current limiting resistor and smooth out the fading with an op-amp.
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.