VC Master Clock with PWM - PCB run

fonik · Posted: Fri Feb 25, 2011 7:47 am Post subject:

boards arrived today eventually. the board house sent it via FedEx but put it in a DHL envelope Laughing

- so the package got special handling, suppose.

so await emails or PMs in the next days.
in two weeks from now i will be on a business travel for two more weeks. during this period i will not be able to package and mail boards, so the next two weeks count Very Happy

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

bottom line: proces lowered for outside europe, slightly raised for europe.
some of you ordered PS3100 as well, they count as 2 PCBs in regards to the postage...

fonik · Posted: Tue Mar 01, 2011 5:45 am Post subject:

i just finished the building documentation. hope it is sufficient.

BUILDING DOCS:
Documentation 1 MAR 2011

janvanvolt · Joined: Nov 24, 2005 Posts: 285 Location: Mainz, Germany

Any PCB's still available ? I'd like be interested in one please Smile

fonik · Posted: Mon Mar 07, 2011 3:09 am Post subject:

SOLD OUT

guitarfool · Posted: Mon Mar 07, 2011 5:21 pm Post subject:

Got mine today! Very Happy

RF · Posted: Mon Mar 07, 2011 5:44 pm Post subject:

Got 'em!

Thanks Matthias!

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

Got mine as well.

Thanks much.

donpachi · Posted: Tue Mar 08, 2011 2:13 am Post subject:

Boards arrived on friday, looking great as usual. Thank you, Matthias!

tazer · Joined: Oct 18, 2010 Posts: 49 Location: UK

rec'd in scotland yesterday with many thanks, what a neat little circuit!

cheers

ian

fonik · Posted: Wed Mar 09, 2011 5:26 am Post subject:

building docs updated:
Documentation 9 MAR 2011

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

They made it to the States just fine...cute little buggers!

Excellent doc write up as usual, too. Thanks!

guitarfool · Posted: Sat Mar 12, 2011 5:01 pm Post subject:

I got one of them working yesterday (no issues at all). Thank you so much for including pads for "DotCom" power connectors!

I also like the zero adjustment for the attenuverter. Nice to be able to center the knob.

I assume that the 2 holes on either side of the tranny pair are for optionally inserting a 1k tempco (to substitute for R5) thermally coupled to the pair?

fonik · Posted: Sat Mar 12, 2011 9:42 pm Post subject:

plord · Joined: Dec 15, 2007 Posts: 19 Location: El Cerrito, CA

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

Hi,

fonik · Posted: Tue Mar 15, 2011 7:29 am Post subject:

i am currently on a business trip and far away from my workbench.

however, try the following: add a 20k resistor from IC1B pin6 to +V, and apply the sync signal to IC1B pin6 as well.
this is how it's been done on the EFM VCO 3D...

diablojoy · Posted: Tue Mar 15, 2011 4:57 pm Post subject:

Peake · Posted: Wed Mar 16, 2011 11:43 am Post subject:

I'm wondering if by combining use of a reset input with a CMOS switch or relay to cut off the output of the clock, that a "start/stop" may be added/simulated. The clock would still be running but the actual output would be cut off until a "start/reset" pulse were applied.

diablojoy · Posted: Wed Mar 16, 2011 2:49 pm Post subject:

fonik · Posted: Wed Mar 16, 2011 3:18 pm Post subject:

Peake · Posted: Thu Mar 17, 2011 1:49 pm Post subject:

To think I used to run bug tests on gear...I've lost that oversight and ability to communicate it. Apologies; please bear with me.

Two inputs: Start and Stop.

Stop would cause a switch to open, disconnecting the final clock output of the module from its out jack. It would still be running, but not connected to the jack.

Start would do two things: close the switch so that the clock signal train is again going to the final output jack; also, that pulse/gate applied to the Start input would go to the proposed Reset point, so that it would "start" cleanly at each "start" pulse/gate.

I haven't fully finished the project yet, so I don't know the size of the pulse/gate train at the output (5V, 15V, etc.). I'm hoping for a fairly large pulse/gate to control the Buchla DIY I've got going; it requires high voltages for clocks which are outside the range of CMOS.

Pardon me if this is too blue-sky and is derailing the thread. Just thinking out loud (even though that gets me into trouble) Laughing

Thanks! They're assembling very cleanly. Nice solder pads! Solder flows onto them verly cleanly. I'm actually not using IC sockets due to the double-sided nature of the board, and I'm not afraid that it would be difficult to remove an IC if it failed.

fonik · Posted: Thu Mar 17, 2011 2:03 pm Post subject:

diablojoy · Posted: Thu Mar 17, 2011 2:07 pm Post subject:

I took it to mean the clock would remain running as normal just preventing it from sending clock pulses to the comparator
if we went across jp1 and jp2 with a 4016 and clocked the logic input of
the 4016 at a slower rate it would produce a 1-2 skip a few feature
dependant on the pulse width and rate of the clock on the logic in
which is not quite what peake had in mind not sure of the value in trying to reset the master clock at the same time
I think peake wanted to send a trigger in to stop the output of the clock
and then at some later time send in another trigger to restart and reset the output of the clock another very useful thing but beyond me
ah peake has already replied while i was writing this doh!
edit and mathias i type too slow

diablojoy · Posted: Thu Mar 17, 2011 2:17 pm Post subject:

Peake · Posted: Thu Mar 17, 2011 2:38 pm Post subject: