Juergen Haible Living VCOs in MOTM
Patrick Joericke
Projecttitel: Juergen Haible Living VCOs in MOTM
Status: IN PROGRESS
Startdate: September 2014
Duedate: December 2018
update: 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
http://www.muffwiggler.com/forum/viewtopic.php?t=117137&highlight=living+vco
general lvco thread
http://www.muffwiggler.com/forum/viewtopic.php?t=93892&postdays=0&postorder=desc&start=130
further build thread:
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
cut the socket on left side for using the tempco
for c7/c8 are film caps fine or bipolar electrolyte caps
BOM Core PCB:
10K Poti for Frontpanel with vernier dials http://www.reichelt.de/534-10K/3/index.html?&ACTION=3&LA=446&ARTICLE=2543&artnr=534-10K&SEARCH=+53+4-10k
BOM Driver PCB:
Living-VCO-Driver-BoM-v1.1.pdf
Randomsource Version files: (with addional wave shaper and VCA)
Wiring:
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.
Schematics:
Build notice:
add 3 Amps for usage with the Panel with separeted Puls and saw output.
Optiponal
Waveshaper adds SIN, TRI:
from: http://electro-music.com/forum/topic-30749-275.html
living_vco_waveshaper_stripboard_211.pdf
please add 22uF electrolyt caps and 100nF decoupling caps
Frontpanel:
JHLivingVCO1.fpd in MOTMwith RED circles (shown on picture)
JHLivingVCO1_wo_red_wo_square.fpd without SQUARE, without RED circle, without switch
JHLivingVCO1_wo_red.fpd in MOTM without red circle
keep Attention on the SQUARE output.. delete it, if you dont have it.
Gallery:
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Attachments download:
Related content
how to bugfix: https://diysynth.wiki.dsl-man.de/wiki/spaces/SKM/pages/336101402/How+to+bugfix
non commercial pages, all infos are best can do without warranty, without liability.