Oscillator: VCO/LFO

Voltage controlled oscillator with three waveforms, modulations and low frequency mode.

:blue_book: Documentation: modules β€” oscillator
:shopping_cart: Product page: microrack β€” oscillator

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Hi. I would like to ask what is voltage range for the Pitch input? Is it bipolar or unipolar?
And what voltage corresponds to A4 440hz wave?

All CV voltage is in range from -5 to +5 volts, 1 V/oct.

Base oscillator frequency is tuned by pitch knob.

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Any chance we might be able to get a sync/reset input? Would come in handy in lfo mode and who doesn’t love some hardsync.

Yes, we plan to add sync input in release version. Adding the hardsync will be simple, but I will think about softsync input also.

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Would be there anything for a sine wave, btw?

Maybe we should have made a stretch goal out of it :wink:

Hello!

We have a great update on the VCO schematic. I found a current leakage of about 20 Β΅A through the Schottky diode, which caused the 1V/oct law to go out of tune, even at the second octave. After changing the diode to a BAV99, we now have 6-7 octaves perfectly tuned!

Also, the LFO range has become wider, and the oscillator can produce an ultra-long period of up to 1 minute!

Now I’m working on the triangle converter, hard sync input, and output levels.

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After a lot of work, we’ve finished debugging the VCO module!

So, triangle output is implemented, hardsync works, output levels is 0…5 or -5…+5 with 5% accuracy!

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