Posted: Wed Aug 01, 2012 2:26 pm Post subject:
PCB OFFER: Single Channel Attenuverter PCB Subject description: to retrofit existing modules..
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:
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.
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? _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source Last edited by fonik on Tue Oct 09, 2012 1:47 pm; edited 3 times in total
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! _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
boards tested, all is working well. ready to take pre-orders... _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
(or is this a "if you have to ask, you dont need it")
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. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
By the way, as of now, I seem to have about 50% fonitronik PCBs in my not-yet-finished system. Which is good
These tiny boards will bring the percentage up significantly.
Judging by the numbers requested so far I think these are key pieces for our modulars. Can you put me down for 20 please? _________________ http://soundcloud.com/for-mash-get-ash
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... _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
due to the quantity of order i am able to lower the price to 0.80 EUR / 1.-USD each chicklet... _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source Last edited by fonik on Sat Sep 01, 2012 12:02 am; edited 1 time in total
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