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revised 292c LPG PCB layout...
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fonik



Joined: Jun 07, 2006
Posts: 3759
Location: Germany
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PostPosted: Tue Nov 27, 2007 5:06 am    Post subject: revised 292c LPG PCB layout...
Subject description: ... ready for (not only) press'n'peel blue.
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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)

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cheers,
matthias
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Etaoin



Joined: Jun 30, 2005
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PostPosted: Tue Nov 27, 2007 5:15 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks!
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Funky40



Joined: Sep 24, 2005
Posts: 875
Location: Swiss
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PostPosted: Tue Nov 27, 2007 5:45 am    Post subject: Reply with quote  Mark this post and the followings unread

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.
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fonik



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PostPosted: Tue Nov 27, 2007 5:51 am    Post subject: Reply with quote  Mark this post and the followings unread

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



Joined: Jan 16, 2007
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PostPosted: Tue Nov 27, 2007 11:27 am    Post subject: Reply with quote  Mark this post and the followings unread

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.
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fonik



Joined: Jun 07, 2006
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PostPosted: Tue Nov 27, 2007 12:13 pm    Post subject: Reply with quote  Mark this post and the followings unread

ericcoleridge wrote:
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.

no need on wasting press'n'peel: just print it out on paper. fix a piece of p'n'p blue on the printout using scotch tape. put it into your printer again and print again!
photo essay

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matthias
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krisp14u



Joined: Nov 11, 2006
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PostPosted: Tue Nov 27, 2007 1:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

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

cheers paul

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ericcoleridge



Joined: Jan 16, 2007
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PostPosted: Tue Nov 27, 2007 3:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
ericcoleridge wrote:
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.

no need on wasting press'n'peel: just print it out on paper. fix a piece of p'n'p blue on the printout using scotch tape. put it into your printer again and print again!
photo essay


Well, I wish I asked you about this sooner... I've been using whole sheets for each layout. I'm not always the brightest bulb in the box.
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fonik



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PostPosted: Wed Nov 28, 2007 2:07 am    Post subject: Reply with quote  Mark this post and the followings unread

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

i incorporated the old docs into the file available via my site (different than link above)...

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matthias
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goldenechos



Joined: Jun 06, 2007
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PostPosted: Wed Nov 28, 2007 10:48 am    Post subject: Reply with quote  Mark this post and the followings unread

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
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loss1234



Joined: Jul 24, 2007
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PostPosted: Thu Nov 29, 2007 9:17 am    Post subject: Reply with quote  Mark this post and the followings unread

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

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goldenechos



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PostPosted: Thu Nov 29, 2007 9:57 am    Post subject: Reply with quote  Mark this post and the followings unread

loss1234 wrote:
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


Either or a a little of both. There are sound examples at the Plan b website.

Tony
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fonik



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PostPosted: Mon May 26, 2008 11:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

corrected BOM for the revised 292c LPG layout:

R4, R9, R10 are 100k!

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asafnetzer



Joined: Jun 16, 2007
Posts: 112
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PostPosted: Tue May 27, 2008 3:12 am    Post subject: Reply with quote  Mark this post and the followings unread

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
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guitarfool



Joined: Feb 26, 2007
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PostPosted: Tue May 27, 2008 5:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
corrected BOM for the revised 292c LPG layout:

R4, R9, R10 are 100k!


NOW you tell me Shocked
(Actually, I went by the values on the schematic).

I didn't do the resonance modification. Has anyone tried it yet?
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zthee



Joined: Feb 20, 2008
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PostPosted: Wed May 28, 2008 12:56 am    Post subject: Reply with quote  Mark this post and the followings unread

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!

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Coriolis



Joined: Apr 11, 2005
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PostPosted: Wed May 28, 2008 3:05 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Press'n'peel is unavailable in Israel

I can't get it directly from a vendor in my country either, but smallbear.com has it in single sheets, and I actually splashed some cash and bought a pack of 20 sheets direct from the manufacturer techniks.com

The rest of the gear for etching is easy too: I use ferric chloride (should be available from where ever you go to buy household chemicals), some tupperware for the etching bath, rubber gloves, etc. Only thing that might cost a bit is a Dremel or similar (I have a Proxxon) drill with a stand. I suppose you can use a normal electric drill, but the stand for it is mandatory, because those tiny 0,8mm drills break easily.

C

Edit: Just found this!
http://www.pcb-store.com/
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fonik



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PostPosted: Wed May 28, 2008 3:09 am    Post subject: Reply with quote  Mark this post and the followings unread

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).
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ericcoleridge



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PostPosted: Wed May 28, 2008 7:52 am    Post subject: Reply with quote  Mark this post and the followings unread

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.
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asafnetzer



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PostPosted: Thu May 29, 2008 3:12 am    Post subject: Reply with quote  Mark this post and the followings unread

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.
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zthee



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PostPosted: Wed Jun 25, 2008 8:48 am    Post subject: Reply with quote  Mark this post and the followings unread

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
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fonik



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PostPosted: Thu Jul 10, 2008 7:52 am    Post subject: Reply with quote  Mark this post and the followings unread

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:  641 Time(s)


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widdly



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PostPosted: Thu Jul 10, 2008 8:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

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.

Last edited by widdly on Thu Aug 05, 2010 10:12 pm; edited 1 time in total
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zthee



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PostPosted: Fri Jul 11, 2008 9:36 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
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.


Sounds exactly as mine!
What a relif Smile

Thanks for the upload!
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fonik



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PostPosted: Fri Jul 11, 2008 12:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

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