new revision DUAL 281 PCB

toppobrillo · Posted: Thu Mar 11, 2010 3:49 am Post subject: new revision DUAL 281 PCB

what kind of interest is there really? i did alot on it the other night. What this is is a double-sided, dual 281 PCB, based on the previous work done on this project. It uses an LM13700 and a single CD4016 IC shared between both generators. Also, the "or'd" out, or "peak" output has been improved.
Wiring will be considerably cleaner, but no PCB mt. pots this time. The final measurements will be 3"x4.2" and will include Euro and MOTM header pwr header. Is there interest in a group buy? Also, I would be interested in doing a quick-turnaround proto build if anyone is game to iron out any kinks.

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

zthee · Joined: Feb 20, 2008 Posts: 414 Location: Stockholm

I'd be in for a few!

johans121 · Posted: Thu Mar 11, 2010 10:41 am Post subject:

Depending on the price I would buy 2 or 4 boards.

synthi · Joined: Jul 20, 2007 Posts: 29 Location: Spain

YES!

numbertalk · Posted: Fri Mar 12, 2010 7:25 am Post subject:

I would be up for a couple of these - when you say you fixed the "OR" problem, was this the issue with it having a slight DC offset? Were you able to eliminate this?

toppobrillo · Posted: Fri Mar 12, 2010 4:22 pm Post subject:

DGTom · Posted: Sat Mar 13, 2010 1:52 am Post subject:

In for 4

I think I'll build the 4 single boards I have as 4 one frac unit modules instead.. I'm a sucker for function generators!

ericcoleridge · Joined: Jan 16, 2007 Posts: 889 Location: NYC

Sounds great; I'd be in for 2 to 4 double boards, depending on price.

a_guy_called_tom · Joined: Jun 21, 2008 Posts: 31 Location: mountains

yes, definately interested in 2 of these

jaidee · Posted: Sun Mar 14, 2010 11:15 am Post subject:

I'll be in for one , thanks.

intercorni · Joined: Jun 04, 2007 Posts: 69 Location: hamburg

1 please

/mr · Posted: Fri Mar 19, 2010 4:53 am Post subject:

Beautiful! The single boards were too big for me when making quads.
Now I want some 281s! Very Happy

Funky40 · Posted: Fri Mar 19, 2010 6:05 am Post subject:

guess i take 4

newdendrite · Joined: Nov 24, 2007 Posts: 25 Location: atlanta, ga

I'm in for four boards! Thanks.

loydb · Joined: Feb 04, 2010 Posts: 393 Location: Providence, RI

I'll grab a few for sure, 2-4 depending on price.

The Peasant · Posted: Fri Mar 19, 2010 10:46 am Post subject:

I'd definitely take a couple.

Take care,
Doug

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

I'd go for 2 as well.

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

Double post.

henrikgo · Joined: Jul 05, 2008 Posts: 40 Location: sweden

I'm in for two!

ach_gott · Joined: Sep 09, 2008 Posts: 79 Location: Chicago

I'm in for between 2 and 4, depending on the price.

diablojoy · Posted: Tue Mar 23, 2010 11:46 pm Post subject:

+2 here please Smile

reve · Joined: Feb 23, 2008 Posts: 149 Location: USA

I'd be in for one or two.

StoneRose · Joined: Nov 04, 2008 Posts: 19 Location: Bern, CH

I'm in for two (or four, depending in the price)

Funky40 · Posted: Sat Mar 27, 2010 7:24 am Post subject:

me too, two or four