VCO, VCFs, ADSR, LFO

A bunch of Eurorack modules that I've put together over the last few months. My first 84HP rack is now full, so time to make another rack too!

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VCO

First up, a voltage controlled oscillator. This one I have built on the same board as the MIDI to CV that I did last time, just wired some jacks and rewrote the code to do square, triangle and sine wave outputs.

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Polivoks VCF

This one was a gift from Alan on the Madbean forum - thanks Alan!

Had to order in the LM4250 chips specially, but damn, I love the sound of this filter. Hooking it up to a sequencer gets some fantastic drum sounds too.

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B291 VCF

Another one from Alan... based on the B291 filter, with low pass, high pass, bandpass, and a whole bunch of other knobs to twiddle that I've not yet fully understood. I need more time to play with this one.

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ADSR

An ADSR that is a bit of a mashup between a few schematics from MFOS. As yet I don't have a VCA to pair with it, that will be the next project.

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LFO

Finally, a low frequency oscillator that I've designed based on some of the boards from MFOS. Two LFOs that output square, triangle and sine waves, and a third one that can be switched between triangle and ramp waves.

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