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 Forum index » DIY Hardware and Software » fonik's place
PCB OFFER: Single Channel Attenuverter PCB
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Wed Aug 01, 2012 2:26 pm    Post subject: PCB OFFER: Single Channel Attenuverter PCB
Subject description: to retrofit existing modules..
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someone here on the forum asked me if i would do a PCB fo a single attenuvertion channel to retrofit CV inputs of built modules with an attenuverter. so i came up with the following DIY PCB:

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.

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.
FlickR Set

BTW i never would have thought that the bottle cap of alcohol-free beer would work for size comparison, but it does!

i am taking pre-orders until 10 SEP 2012.

Pricing:
0,80 EUR/1.- USD each chicklet
shipping and handling TBA (but reasonable as always)


just indicate your interest by posting in this thread. i don't take any money up-front, i just ask you to be honest.

the PCB is single sided, 1.4in x .7 in (36mm x 18mm), and acommodates 9, 16, and 24mm alphas, i tried it with a 9mm vishay, too.
each PCB provides a complete power input filter/decoupling scheme, so you could even build a module from it. nevertheless, there are wirepads for the positive and negative rail after the filter, making it possible to use one filter/decoupling section for multiple daisychained PCBs.

here is the documentation.

OLD POST
someone asked me if i would do a PCB for a single attenuvertion channel to easily retrofit CV inputs of built modules with an attenuverter.
i came up with two designs, one in TH and one in SMT. now i think of doing a PCB run. TH or SMT?

the TH would be 100% DIY.
the SMT could be pre-assembled (without potentiometer) or 100% DIY, too.
the PCBs would be mounted to the panel using a PCB mounted potentiometer (i.e. 9mm or 16mm alpha)...

so i basically have three options:
TH 100% DIY,
SMT 100% DIY, or
SMT pre-assembled.

what would be preferrable?

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cheers,
matthias
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Last edited by fonik on Tue Oct 09, 2012 1:47 pm; edited 3 times in total
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citric acid



Joined: Jun 11, 2011
Posts: 42
Location: germany

PostPosted: Fri Aug 17, 2012 1:00 pm    Post subject: Reply with quote  Mark this post and the followings unread

th diy or a pre one.
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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Fri Aug 24, 2012 3:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

finished the assembly of a prototype PCB. i will not test it now, i will have to go to bed (old farts like me need their sleep).

i tried it with a 16mm alpha, and with a 9mm vishay. they both worked well. the 24mm alpha can only fit better.



BTW i never would have thought that the bottle cap of alcohol-free beer would work for size comparison, but it does!

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cheers,
matthias
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fonik



Joined: Jun 07, 2006
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PostPosted: Mon Aug 27, 2012 2:09 am    Post subject: Reply with quote  Mark this post and the followings unread

boards tested, all is working well. ready to take pre-orders...
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cheers,
matthias
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bubzy



Joined: Oct 27, 2010
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PostPosted: Mon Aug 27, 2012 2:52 am    Post subject: Reply with quote  Mark this post and the followings unread

what would i need one of these for?

(or is this a "if you have to ask, you dont need it") Very Happy

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fonik



Joined: Jun 07, 2006
Posts: 3721
Location: Germany
Audio files: 23

PostPosted: Mon Aug 27, 2012 4:14 am    Post subject: Reply with quote  Mark this post and the followings unread

bubzy wrote:
what would i need one of these for?

(or is this a "if you have to ask, you dont need it") Very Happy

a lot of modules have a CV input. very often an attenuator is associated with this CV input.
then there are quite a few people who like attenuVERTers (or polarizers) on CV inputs.
with an attenuverter/polarizer you have full attenuation at 12 o'clock. right turn gives you the positive signal (amplification 0 to +1), counter clockwise gives you the inverted signal (amplification 0 to -1).

this little PCB chicklet is meant as an add on to existing designs, projects, modules that do not provide attenuvertion on CV inputs, nevertheless, you could build a dedicated module from several of these PCBs.

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cheers,
matthias
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donpachi



Joined: Jul 16, 2009
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Location: Marburg
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PostPosted: Mon Aug 27, 2012 8:18 am    Post subject:   Reply with quote  Mark this post and the followings unread

20 for me, please.

By the way, as of now, I seem to have about 50% fonitronik PCBs in my not-yet-finished system. Which is good Smile
These tiny boards will bring the percentage up significantly.
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Danno Gee Ray



Joined: Sep 25, 2005
Posts: 1341
Location: Telford, PA USA

PostPosted: Mon Aug 27, 2012 4:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'd be in for 15 TH/DIY.
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Level5



Joined: Feb 16, 2007
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PostPosted: Wed Aug 29, 2012 12:40 am    Post subject: Reply with quote  Mark this post and the followings unread

I'm in with 25
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ashleym



Joined: Aug 20, 2009
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PostPosted: Wed Aug 29, 2012 11:20 am    Post subject: Reply with quote  Mark this post and the followings unread

Judging by the numbers requested so far I think these are key pieces for our modulars. Can you put me down for 20 please?
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fonik



Joined: Jun 07, 2006
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PostPosted: Thu Aug 30, 2012 1:37 am    Post subject: Reply with quote  Mark this post and the followings unread

ashleym wrote:
Judging by the numbers requested so far I think these are key pieces for our modulars. Can you put me down for 20 please?

yep.

i got quite a few inquiries over at muff's. however it seems that everybody has announced their need, so i could close the pre-order actually...

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cheers,
matthias
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tazer



Joined: Oct 18, 2010
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PostPosted: Fri Aug 31, 2012 1:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Hey

I would like 10 please

cheers

Ian
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fonik



Joined: Jun 07, 2006
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PostPosted: Fri Aug 31, 2012 1:17 pm    Post subject: Reply with quote  Mark this post and the followings unread

due to the quantity of order i am able to lower the price to 0.80 EUR / 1.-USD each chicklet... Cool
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cheers,
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Last edited by fonik on Sat Sep 01, 2012 12:02 am; edited 1 time in total
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davidschwan



Joined: Jun 07, 2008
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PostPosted: Fri Aug 31, 2012 7:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

I'm interested in 20.
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ashleym



Joined: Aug 20, 2009
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PostPosted: Mon Sep 17, 2012 2:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

Just asking how the ordering is going?
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LektroiD



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PostPosted: Tue Sep 18, 2012 12:04 am    Post subject: Reply with quote  Mark this post and the followings unread

I'd be in for 10 (TH)
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fonik



Joined: Jun 07, 2006
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PostPosted: Wed Sep 19, 2012 11:30 pm    Post subject: Reply with quote  Mark this post and the followings unread

@ashleym:
to place a pre-order just post in this thread, or send me an email, or PM.

we passed the deadline allready (see 1st post), however, as allways i ordered a few spares. so still no problem to place orders.

@lektroid:
i put you on the list. thank you.

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cheers,
matthias
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crashlander42



Joined: Oct 21, 2006
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PostPosted: Mon Sep 24, 2012 4:53 am    Post subject: Reply with quote  Mark this post and the followings unread

Am i too late? Do you have any spares left?
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fonik



Joined: Jun 07, 2006
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PostPosted: Mon Sep 24, 2012 7:32 am    Post subject: Reply with quote  Mark this post and the followings unread

still spares left.
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kkissinger



Joined: Mar 28, 2006
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PostPosted: Mon Sep 24, 2012 7:37 am    Post subject: I'd like to order some Reply with quote  Mark this post and the followings unread

I'd like to order 20 of them if they are available.
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crashlander42



Joined: Oct 21, 2006
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PostPosted: Mon Sep 24, 2012 8:42 am    Post subject: Reply with quote  Mark this post and the followings unread

I'd like 12 pretty please.
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Paradigm X



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PostPosted: Wed Sep 26, 2012 12:13 pm    Post subject: Reply with quote  Mark this post and the followings unread

ill take 10 please !

many thanks.

Wink
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magneticstripper



Joined: Jan 12, 2009
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PostPosted: Wed Sep 26, 2012 1:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

10 would be great (if there are any left)
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numbertalk



Joined: May 05, 2008
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PostPosted: Fri Sep 28, 2012 7:13 pm    Post subject: Reply with quote  Mark this post and the followings unread

Any spares? I'll take 20 if so.
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kitsch-bent



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PostPosted: Fri Sep 28, 2012 9:16 pm    Post subject: Reply with quote  Mark this post and the followings unread

i'd be up for 50 if it isn't too late
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