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

...

http://www.muffwiggler.com/forum/viewtopic.php?t=93892&postdays=0&postorder=desc&start=130

further build thread:

http://www.baud-ratereredredsynth.com/blog/ 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

...

for c7/c8 are film caps fine or bipolar electrolyt electrolyte caps 

BOM Core PCB:

Living VCO Core BoM.pdf 

BOM Driver PCB:

Living-VCO-Driver-BoM-v1.1.pdf

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

The calibration can be found here:
http://www.jhaible.com/living_vcos/jh_living_vcos.html

TRI to SIN converter:

Image Removed

Image Removed

source:https://www.muffwiggler.com/forum/viewtopic.php?t=93892&postdays=0&postorder=asc&start=50&sid=16eca0564da94b711592160be48cbf31

Image Removed

source: http://www.muffwiggler.com/forum/viewtopic.php?t=24267&start=0&sid=447cefb9a3fd208a3ab9f7c9245122b3

It is a precision rectifier and double-and-lift circuit to convert saw to triangle, followed by a standard differential pair sine shaper (from the Thomas Henry VCO-1, but optimized for Euro rails). Here's the parts list:
1 quad opamp (TL074)
2 NPN transistors (2N3904)
2 small signal diodes (1N914 or 1N4148)
3 22p ceramic caps
1 20k trimmer
1 50k trimmer
1 100k trimmer
and a small pile of 1/4W standard resistors:
1 390R
1 1k
2 2.2k
6 10k
2 13k
1 18k
2 20k
Notes:
1) the 5V source could be the 12V rail, with a 68k resistor in place of 20k . Alternatively, you could use a -5V source through a 10k resistor and a 20k trimmer into the negative input of the opamp.
2) the 100k trimmer could be replaced by a 43k resistor and a 20k trimmer (the ideal resistance there is about 53k for minimum sine THD). At the correct trimmer setting, the sine from this circuit can have THD as low as 0.42%.
3) the 50k trimmer could be replaced with two 24.9k 1% resistors, if the rest of the resistors around the transistor circuit are also 1% (or not).
4) If the saw is fed directly to the sine trimmer through the 100k trimmer (e.g., using an SPDT On-On selector switch) then this circuit also gives a "sigmoid" (S-shaped) wave, which is a nice alternative to saw.

Frontpanel:

JHLivingVCO1.fpd in MOTM

BOM Driver PCB:

Living-VCO-Driver-BoM-v1.1.pdf

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

Image Added

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
Image Removed

keep Attention on the SQUARE output.. delete it, if you dont have it.

5U_LVCO_DSL-MAN.fpd

...

Gallery:

Attachments download: