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Projecttitel: Juergen Haible Living VCOs in MOTMStatus:
Startdate: September 2014Duedate: December20162018update: January 2017 addional pcb for separate outputs Manufacture link: check the legacy page: http://www.jhaible.info/wsdindex.html |
update: for my MOTM Panel version its needed to use a separate triple Amplifier for the SAW outs or pulse outs. check this out LVCO addon
check the legacy page: http://www.jhaible.info/wsdindex.html
Build thread on muffwiggler: for Eurorack pcb version
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http://www.reredredsynth.com/ladbrokeGroveVCOarray-implmt.htm
known Issues for Eurorack pcb version from muffwiggler :(my pcb as shown here is the original pcb from J.H)
R39 use socket and try 820K to 1M
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for c7/c8 are film caps fine or bipolar electrolyt electrolyte caps
BOM Core PCB:
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Living-VCO-Driver-BoM-v1.1.pdf
Wiring:
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Calibration
Calibration is quite similar to what you have on other VCOs.
S - Scale. Here you adjust the 1V/Oct tracking. Apply a CV from your Keyboard or Midi->CV Converter. Connect a guitar tuner or frequency counter to the VCO output and adjust "S" until 1 octave on the keyboard is exactly 1 octave of VCO frequency.
F - Frequency. Here you can adjust the absolute frequency (not the scale). You can set it to something like 16Hz (or whatever else you prefer) for the ccw end position of the 10-Turn front panel "Frequency" control.
H - High frequency tracking. Honestly: i didn't even adjust this in my prototype - I just left it in mid position. If you need to, you can fine tune the octave tracking for higher frequencies here.
PW1(2)(3)Adj - Pulse width adjust. With the front panel Pulse Width knob in 12 o'clock position, adjust the trimmer for 50% pulse width.
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