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 Forum index » DIY Hardware and Software
anybody able to ID this PCB?
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new voodoo



Joined: May 06, 2013
Posts: 90
Location: RVA USA

PostPosted: Sat Nov 30, 2013 5:25 pm    Post subject: anybody able to ID this PCB? Reply with quote  Mark this post and the followings unread

I know its a filter, but I cant remember anything else and I have NO idea where I put all the info that was with it. I just found it in a pile and started populating it cause I had a few minutes and thought "why not--i think it might go in this other thing over here or maybe with this doohicky over there"
and then after id done the ICs..kinda figured out I had NO idea what it was exacty..and theres NOTHING written on it other than a couple numbers which turn out to be unrelated.

im sure someone knows what it is? Maybe we can think of it as a 'challenging new game of figure out 'what the hell he's found in his pile of junk today'"

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new voodoo



Joined: May 06, 2013
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PostPosted: Sat Nov 30, 2013 5:31 pm    Post subject: Reply with quote  Mark this post and the followings unread

pics


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CAM00319.jpg
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Bogus Noise



Joined: Jun 03, 2009
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PostPosted: Sun Dec 01, 2013 12:23 am    Post subject: Reply with quote  Mark this post and the followings unread

I can't make it out, but have you Googled that code on the middle left of the second pic?
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new voodoo



Joined: May 06, 2013
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PostPosted: Sun Dec 01, 2013 5:22 am    Post subject: Reply with quote  Mark this post and the followings unread

yep thats the numnbers i was referring to..apparentlt just refers to the blank perfboard or whatever[right]
thank yoou though, appreciate it.[/right]

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elmegil



Joined: Mar 20, 2012
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PostPosted: Sun Dec 01, 2013 8:26 am    Post subject: Reply with quote  Mark this post and the followings unread

Maybe try googling the components to find a BOM?

Is there any particular component that's more unusual? i.e. if it's a filter, is it made with the typical SSM2164 or LM13700, or is it something more esoteric?
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emmaker



Joined: Aug 10, 2007
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Location: Portland, OR

PostPosted: Sun Dec 01, 2013 1:20 pm    Post subject: Reply with quote  Mark this post and the followings unread

Yaaa, Don't you love hobby electronics.

moogah SEM VCF

I was just going thru my board backlog today and have it on my desk.

OK, I work in electronics and when I find stuff like this I just bang my head against the wall. Here are some of the issues I see with the board. I've worked in electronics long enough I can handle all these. And if I need good test or rework equipment I can just take things to work and do them.

* No board name or rev number.
* Values on the board silk screen vs. designators. Great when you assemble it, bad when you have to debug/fix it or values change.
* Small pads which require good soldering equipment which most hobbyists don't have to pull/change parts.

Good luck.
Jay S.
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mcop



Joined: Apr 27, 2012
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Location: Brighton UK

PostPosted: Mon Dec 02, 2013 1:24 am    Post subject: Reply with quote  Mark this post and the followings unread

It is indeed the Mooghah SEM filter board. If you are going to build it be sure to read the thread on Muffs first as it can be built in two different ways - with and without voltage controlled resonance. Certain components are only needed depending on which build you go for. Also one of the transistors is silk screened the wrong way round on the board.
Built mine a while ago with voltage controlled resonance and love it although it still has a few minor issues to be sorted. Been having to much fun using it to get round to that yet Very Happy

http://www.muffwiggler.com/forum/topic-82093.html
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new voodoo



Joined: May 06, 2013
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Location: RVA USA

PostPosted: Sun Dec 15, 2013 12:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

yep it is and thanks to everyone.
And yes, I DID read the thread.
WOW, if id known all the problems id never have gotten on it, but ill soldier thru.
Just FYI for anyone else getting it-PM me if you do as there are QUITE a few unlabeled, poorly labeled, wrong way-facing, unnecessary SMD pads, etc issues and ive made a list from the forum thread so I can be sure and check them all off when finishing.

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new voodoo



Joined: May 06, 2013
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Location: RVA USA

PostPosted: Sun Dec 15, 2013 12:40 pm    Post subject: Reply with quote  Mark this post and the followings unread

emmaker wrote:
Yaaa, Don't you love hobby electronics.

moogah SEM VCF

I was just going thru my board backlog today and have it on my desk.

OK, I work in electronics and when I find stuff like this I just bang my head against the wall.

Good luck.
Jay S.

Yea, I do mostly custom guitars but I also do a good bit of circuit bending and trading/selling in a VERY minor way (imagine an online version of a table at a swap meet)..that said, id have NEVER put this out BUT Id also say at the same time-its probably (and I dnt know the person in the slightest) smeone also doing it very small time and perhaps its their first project or they are very young and got excited and focused on the finish line and not the details (which can, admittedly, REALLY get you in electronics)

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