VC Master Clock with PWM - PCB run

fonik · Last edited by fonik on Wed Mar 09, 2011 5:27 am; edited 7 times in total

hi all,

for use with my KLEE and VCPS-8 sequencers i always wanted a Clock with PWM. since in those sequencers the length of the trigger out depends on the duty cycle of the clock, PWM of the clock will add live to the sequences.

here are two very short sound samples (mp3) that show what i mean. the trigger out of the sequencer is routed to the cutoff of a ssm2044 filter:
VC CLock PWM VC CLock Speed CV

BUILDING DOCS:
Documentation 9 MAR 2011

the CV Clock features a manual speed control, CV in for speed with attenuator, manual PW control, CV in for PWM with attenuVERTER(!), clock output, and an indicator LED.
the VCO creates a falling ramp. the clock pulse is derived from that falling ramp using a comparator, thus you will not have a change in timing when doing PWM!

i am taking pre-orders until 7th of FEB. PCBs should be available mid/end of february.
(see: Recommendations for PCB offers on electro-music)
SOLD OUT

the price will be:

5.-EUR/7.-USD each PCB

+ packaging & postage (revised, german postal service changed their prices)
outside europe: 2 PCBs = 3.-USD / 3+ PCBs = 5.50 USD
europe: 2 PCBs = 2.-EUR / 3+ PCBs 4.-EUR
deutschland: 2 PCBs = 1.-EUR / 3+ PCBs 1.50EUR

frontpanel suggestion (to give you an idea):
Posted Image, might have been reduced in size. Click Image to view fullscreen.

PCB layout:
Posted Image, might have been reduced in size. Click Image to view fullscreen.

magman · Joined: Feb 04, 2009 Posts: 363 Location: Liverpool, UK

Fonik,

I would be interested in at least 2, possibly 3.

Regards

Magman

RF · Posted: Fri Jan 28, 2011 6:21 am Post subject:

I'd go for three of these, Matthias

Thanks for offering...

bruce

XCenter · Joined: Oct 01, 2005 Posts: 113 Location: Germany

Zwo Platinchen für mich bitte.

emdot_ambient · Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD

Two please!

You know...I'm a huge fan of your products, fonik...but so far I haven't gotten around to building any of them! Embarassed

That day will come, but it'll still be a while; I'm collecting projects for later while slowly working away on a prioritized list. Confused

rosch · Joined: Oct 03, 2009 Posts: 164 Location: germany

i'd like 3 please
thank you!

Danno Gee Ray · Joined: Sep 25, 2005 Posts: 1351 Location: Telford, PA USA

I'd be in for 2 please.

droffset · Posted: Fri Jan 28, 2011 4:28 pm Post subject:

Two for me please.

brother303 · Joined: Nov 02, 2010 Posts: 139 Location: ruhr-area/germany

Hello,

3 for me,please. Wink

Would it be possible to run two (or more) of these pcbs in sync to each other?

This would make it much easier to play around with two (or more) sequencers running on the same clock but with different pwm-settings.

Best regards
Greg

diablojoy · Posted: Fri Jan 28, 2011 8:10 pm Post subject:

Very nice I will take at least 4 also please mathias Smile

if you can add a sync in , I will make that 12 Very Happy

the ability to sync would really be a most usefull addition
cheers

Adam-V · Posted: Sat Jan 29, 2011 2:14 am Post subject:

Sounds great Matthias, I'll take half a dozen if this goes ahead.

Cheers,
Adam-V

fonik · Posted: Sat Jan 29, 2011 7:20 am Post subject:

fonik · Posted: Sat Jan 29, 2011 7:28 am Post subject:

Level5 · Joined: Feb 16, 2007 Posts: 29 Location: Germany

I'm in for 6 PCB

glacial23 · Joined: Apr 30, 2008 Posts: 32 Location: Cleveland, OH

Three for me, please!

Dego · Joined: Apr 22, 2008 Posts: 139 Location: Sweden

2 pcbs please

whomper · Posted: Sun Jan 30, 2011 12:17 pm Post subject:

Two for me, please.

brother303 · Joined: Nov 02, 2010 Posts: 139 Location: ruhr-area/germany

Hi,

brother303 · Joined: Nov 02, 2010 Posts: 139 Location: ruhr-area/germany

*sorry,double post* Embarassed

patchdub · Joined: Jan 21, 2009 Posts: 56 Location: Taos, NM

definitely 1 perhaps 2

diablojoy · Posted: Mon Jan 31, 2011 12:20 am Post subject:

hi mathias just wondering I am not sure if it can be this simple but if
I kludged an analogue switch say one section of a dg412 at c2 to provide a dump cct and sent a clock signal to the logic in would that provide a reasonable sync to a master ? I maybe completely wrong but the switch would only need to short c2 ? of course it may just make it a very odd clock or nothing at all. I still have so much to learn here
since there are 4 spst in a dg412 I was thinking it would be good for a quad unit

fonik · Posted: Mon Jan 31, 2011 12:22 am Post subject:

fonik · Posted: Mon Jan 31, 2011 12:27 am Post subject:

donpachi · Posted: Mon Jan 31, 2011 1:16 am Post subject:

Zwei für mich, bitte Smile

diablojoy · Posted: Mon Jan 31, 2011 2:33 am Post subject:

reset yes I think you would be correct if iam reading it right mfos's vco sync is done kind of a similar way in theory though the implementation is far more complex to my mind hence my concern at how simplistic i was making it
1 chip for 4 ccts and 2 resistors per cct for the logic in's
just sounds too good so I dunno either
guess I will just try it out on breadboard when i can free it up
it's got a vactrol based pan on it at the minute

thanks for taking the time Smile