revised 292c LPG PCB layout...

fonik

just revised the layout and documentation on the 292c LPG:

http://www.modular.fonik.de/pdf/LPG_em.pdf
(if it does not show up right, try to download it before opening)

etaoin · Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL

Thanks!

Funky40 · Posted: Tue Nov 27, 2007 5:45 am Post subject:

ouhh, thanks,

But Matthias, can you please leave the old one also on your site ?
I personally love the very fast building on your modules because of Printmounted Pots or Sockets.
For Euro/Frac use it allows a real fast building.

fonik · Posted: Tue Nov 27, 2007 5:51 am Post subject:

okay funky, i will compile it into the new PDF...

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

This is so great Fonik, thanks for another great layout!

Do you have any other projects in the works (so I can plan ahead)?

The only small problem I have with printing your layouts is that I can't cut and paste from a PDF (as far as I know). I have to print the whole page--which wastes alot of valuable press and peel real estate.

fonik · Posted: Tue Nov 27, 2007 12:13 pm Post subject:

krisp14u · Joined: Nov 11, 2006 Posts: 206 Location: uk

Hay matthias cheers for this
there wil be 2 going in the modular this week Smile

cheers paul

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

fonik · Posted: Wed Nov 28, 2007 2:07 am Post subject:

goldenechos · Posted: Wed Nov 28, 2007 10:48 am Post subject:

I built the original layout of this 292, and I have to say, it sounds great.

Very useful.

Glad to see you tied up the unused op-amp in this layout!

Tony

loss1234 · Posted: Thu Nov 29, 2007 9:17 am Post subject:

i am a bit confused as to how this circuit works or what it does. is it just a gate or is it more like a filter?

thanks

goldenechos · Posted: Thu Nov 29, 2007 9:57 am Post subject:

fonik · Posted: Mon May 26, 2008 11:39 pm Post subject:

corrected BOM for the revised 292c LPG layout:

R4, R9, R10 are 100k!

asafnetzer · Joined: Jun 16, 2007 Posts: 112 Location: Israel

Looks great Fonik,
Just wondering, if anyone here is willing to etch me a board as well I'll pay for the work and shipping.
Press'n'peel is unavailable in Israel and I don't have any other components for the etching process, Stripboard is my thing Wink

Asaf

guitarfool · Posted: Tue May 27, 2008 5:19 pm Post subject:

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

I just started to build 2 of these, but with the old documentation Smile

Just need the vactrol and the usual wires to pots and stuff like that. Hope to be done within a week or so!

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

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

Coriolis · Joined: Apr 11, 2005 Posts: 616 Location: Stilling, Denmark

fonik · Posted: Wed May 28, 2008 3:09 am Post subject:

some people get very good results with paper from weekly magazines or catalogues. google for it (don't have the link on hand right now).

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

For me, press n' peel works the best; But I've successfully used glossy inkjet printer paper in the past. I've also read where people describe glossy magazine paper (just ripped from a magazine) as working best of all.

asafnetzer · Joined: Jun 16, 2007 Posts: 112 Location: Israel

If I'll walk to a store in Israel and ask for chemicals I'll get arrested Wink

No actually I really don't have any more space in my apartment for anything, even the dog is afraid to sit on the floor cause all the stuff laying there.

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

Just finished my dual LPG!

I think something is wrong with the gate part though. Does anyone who built it got a sound sample of it?

I just wanna verify that it sounds like it should! Smile

fonik · Posted: Thu Jul 10, 2008 7:52 am Post subject:

helo zthee,

my apologies for this late reply. hope you have some fun with your LPGs anyways.

here is a short sample of the LPG.
square wave into LPG, offset fully clockwise, pulse from CGS utility LFO into LPG.
8 pulses in each mode: 1st filter mode, 2nd gate mode, 3rd both.

LPG_01.mp3

Description:

the three modes of the LPG: filter, gate, both

Download

Filename:

LPG_01.mp3

Filesize:

131.25 KB

Downloaded:

1766 Time(s)

widdly · Posted: Thu Jul 10, 2008 8:46 pm Post subject:

I built one of these last night on a piece of perf board using a bunch of parts I had in my junk box.

I added a 100k attenuator on the trigger input. It's handy in filter mode.

I left out C5 and R5. I can't quite work out what they are for. Anyone tell what they are meant to do?

For D1, I didn't have a 3.5v zener so I used a 5v. I'm guessing the zener here is to stop the LED's from getting blown by too much voltage. Any the zener is for?

I didn't have a 20k trimmer so I left out R7 and used a 50k trimmer.
I made my own vactors using two LEDs and two LDRs. The LDRs were two different sorts Shocked

. Only problem is getting the LED/LDR combo light tight..at the moment it works ok if I put it under a t-shirt Embarassed

I think I'll do something with heat shrink and lots of electrical tape.

It sounds really great, much like the samples from fonic above. I was kind of surprised given the hokey nature of my "vactrols" and my liberal interpretation of the schematic.

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

fonik · Posted: Fri Jul 11, 2008 12:53 pm Post subject:

good to hear. i am using the LPG in filter mode most of the time. only sometimes i use it at VCA...