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TR808 kick pcb
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Dougster



Joined: Sep 20, 2005
Posts: 272
Location: Tucson, AZ, USA

PostPosted: Thu Sep 22, 2011 6:42 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
so the single voice idea has died? will have to ponder about it a little bit...

Umm, what gave you that idea?

To be honest, at this point, I'm probably going to make all three variants... Cool The multi-voice boards will be first, since I'm pretty much done with them already. I still have to decide about the potentiometers, board sizes and mounting holes for the individual voices...

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fonik



Joined: Jun 07, 2006
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PostPosted: Thu Sep 22, 2011 10:39 am    Post subject: Reply with quote  Mark this post and the followings unread

Laughing
good to hear. i stay tuned...

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brother303



Joined: Nov 02, 2010
Posts: 139
Location: ruhr-area/germany

PostPosted: Thu Sep 22, 2011 12:55 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi Doug,

Dougster wrote:
The multi-voice boards will be first, since I'm pretty much done with them already.


wow,way cool!



Any idea when a run could happen?

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Dougster



Joined: Sep 20, 2005
Posts: 272
Location: Tucson, AZ, USA

PostPosted: Thu Sep 22, 2011 4:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

Two things need to happen before I make new boards. 1) This batch of MB-808's has to be out the door, and 2) I want to build prototypes of each new board before I order and ship the final versions. I'll be back from my business trip in mid October, so I'm hoping to get the MB-808's out the door by the end of October. (/me crosses his fingers for luck.)

That said, I'm hoping for November some time. Of course, all of us developer types are optimists... Wink

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brother303



Joined: Nov 02, 2010
Posts: 139
Location: ruhr-area/germany

PostPosted: Fri Sep 23, 2011 8:59 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi,

Dougster wrote:
That said, I'm hoping for November some time. Of course, all of us developer types are optimists... Wink


Very Happy

I´m not in a hurry,no problem here.

Are there some leftovers for the next MB808 run or are all boards/kits spoken for? Maybe I should jump on this train...

Kind regards
Greg
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Dougster



Joined: Sep 20, 2005
Posts: 272
Location: Tucson, AZ, USA

PostPosted: Fri Sep 23, 2011 10:31 am    Post subject: Reply with quote  Mark this post and the followings unread

brother303 wrote:
Are there some leftovers for the next MB808 run or are all boards/kits spoken for? Maybe I should jump on this train...

All of the third batch kits are spoken for. I'll be making a fourth batch of kits, since I had to buy parts for 250 kits. (For example, the minimum order quantity for the colored switches was 1000, and each kit takes four.)

If the fourth batch is anything like the third, I'll have a bunch of people on the waiting list, but only about a quarter of them will actually buy...

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Every DIY person should own a copy of Electronotes: http://electronotes.netfirms.com

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inlifeindeath



Joined: Apr 02, 2010
Posts: 315
Location: Albuquerque, NM

PostPosted: Fri Sep 23, 2011 12:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

What's the price per kit if I may ask?
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Peake



Joined: Jun 29, 2007
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PostPosted: Fri Sep 23, 2011 1:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

Dougster wrote:
If the fourth batch is anything like the third, I'll have a bunch of people on the waiting list, but only about a quarter of them will actually buy...


Can't wait to buy mine Cool

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Dougster



Joined: Sep 20, 2005
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Location: Tucson, AZ, USA

PostPosted: Fri Sep 23, 2011 1:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

Roughly speaking (it depends on the cost of pcb manufacturing, and I won't find out the final cost until I actually place the order) the kit from me is about $200, and you'll need about $150 of parts from Mouser or likesuchas, plus a toroid for the power supply. The one I use is about $30 from Digikey. That will get you a fully functioning 808 sound generator with MIDIbox sequencer.

After that, you'll need some kind of case. Most of the guys have been getting a Hammond 1456RL1 and then having Front Panel Express cut the holes and either having the top silkscreened or printing an overlay to stick on...

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n.d



Joined: Dec 15, 2011
Posts: 22
Location: Argentina

PostPosted: Thu Dec 22, 2011 12:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

Can I trigger the 808 sounds from a DR110?
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Dougster



Joined: Sep 20, 2005
Posts: 272
Location: Tucson, AZ, USA

PostPosted: Thu Dec 22, 2011 5:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

Anybody have a DR110 I can borrow? Wink

I'm really slow, but I *will* get it back to you eventually...

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Sebo



Joined: Apr 27, 2007
Posts: 538
Location: Argentina

PostPosted: Fri Dec 23, 2011 1:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

The 808 is active high, and the DR-110 is active low, so you have to invert the signal. You can use a transistor for every trigger or a couple of 4069 (each will invert 6 triggers).
Also the DR-110 have a trigger output (is activated with the accent) that you can use as is, without any mod.

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rosch



Joined: Oct 03, 2009
Posts: 162
Location: germany

PostPosted: Sat Dec 24, 2011 1:25 am    Post subject: Reply with quote  Mark this post and the followings unread

doug,
that's nice to hear about another run of MB808 in the future. i'd be in if there's still room on your list. should i email / MB-pm you about it?
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Dougster



Joined: Sep 20, 2005
Posts: 272
Location: Tucson, AZ, USA

PostPosted: Sat Dec 24, 2011 8:50 am    Post subject: Reply with quote  Mark this post and the followings unread

rosch wrote:
i'd be in if there's still room on your list. should i email / MB-pm you about it?

Email is best. Doug (at) midibox addict (dot) com

Regards,
Doug

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isak



Joined: Dec 13, 2009
Posts: 699
Location: Israel
Audio files: 18

PostPosted: Fri Jun 20, 2014 3:18 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Sebo.

I see the microlarge site is down.
As i understand you did the 3 big boards?
Do you maybe have the PDF files and all the info about this project?
If you do please can I get them form you?
I really want to start this project.

Cheers,
Isak E.

EDIT:
did you eventually used the http://www.msc175.de/ as a sequencer module?
assuming you used http://www.msc175.de/ midi module, i see in your youtube vid you play from comp sequencer, is it directly from your sound card midi out to the midi in of the module?

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n.d



Joined: Dec 15, 2011
Posts: 22
Location: Argentina

PostPosted: Fri Jun 20, 2014 11:51 am    Post subject: Reply with quote  Mark this post and the followings unread

Isak: you can find everything via waybackmachine.
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isak



Joined: Dec 13, 2009
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PostPosted: Fri Jun 20, 2014 1:41 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi thanks.
It's the first time I hear on this thing, how does it work?
How do I pull info from there?

Thanks again!

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Last edited by isak on Fri Jun 20, 2014 3:09 pm; edited 1 time in total
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elmegil



Joined: Mar 20, 2012
Posts: 1476
Location: Chicago
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PostPosted: Fri Jun 20, 2014 2:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

Go to: https://archive.org/web/

enter a URL that isn't working into the search bar top center.

If they have an archive of it, they'll show you all the different snapshots they have of that site. Sometimes you have to go back a ways to get the info you're looking for.
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isak



Joined: Dec 13, 2009
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PostPosted: Fri Jun 20, 2014 3:44 pm    Post subject: Reply with quote  Mark this post and the followings unread

amazing! thank you!
i got all the info i needed Smile

elmegil,
if i'm not mistaken yu built yours on stripboards, -minus- cool layouts, right?
have finish? do you have a sequencer?

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elmegil



Joined: Mar 20, 2012
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PostPosted: Fri Jun 20, 2014 6:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

Finish? Hahahaha.

I have a completed BD and Snare--the Snare is not a stripboard, but just laying it out on protoboard from the schematics--and a 2/3's completed hats and cymbal and cowbell (they all go together since they share a noise source). I have my "voice box" stickered and drilled and a power supply and accent circuit (though I'm having some doubts about the supply's capacity at this point). And I have a couple weak attempts at a sequencer--one using and Arduino, and one I was encouraged in by someone else that could still turn into a real sequencer using a PIC. Neither of them is very far along though.

So I need to figure out
1) how to mount all the boards in the box
2) whether my power will be sufficient
3) when I'm going to finish it around a LOT of other projects, including three TTSH ARP 2600 clones that I haven't even started

I will eventually finish, but I doubt before I'm 50. Smile
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elmegil



Joined: Mar 20, 2012
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PostPosted: Fri Jun 20, 2014 6:37 pm    Post subject: Reply with quote  Mark this post and the followings unread

PS I'm not very far from 50 now Wink
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isak



Joined: Dec 13, 2009
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PostPosted: Sat Jun 21, 2014 1:59 am    Post subject: Reply with quote  Mark this post and the followings unread

Dont worry friend, 50 is the new 30 Wink

Do you think the MFOS wall wart PSU will do for the 808 modules?

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

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elmegil



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PostPosted: Sat Jun 21, 2014 7:35 am    Post subject: Reply with quote  Mark this post and the followings unread

That's the question, because that's exactly what I have in my voice box. I'm not sure, since I've only used it to run three voices so far.

I suspect what will be important is the current capability of the wall wart. Here's why I say that:

I recently refitted a Napa Valley 96 CD case to be a Eurorack case, and I tried using Frequency Central's wall wart supply which is very similar to Ray's. It uses a 1A wart, and I found that I could not drive two full 106HP rows with it, particularly with a Dual Mirror Core VCO (everything else seemed to tolerate the voltage falling down around 10V).

I ended up building a variant on Thomas Henry's supply from Analog Synth for the 21st Century, using LM317/LM337 so I could adjust the rails to be exactly +/-12V. I used a transformer with a fair bit more current capability and it works great now.
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isak



Joined: Dec 13, 2009
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PostPosted: Sat Jun 21, 2014 7:51 am    Post subject: Reply with quote  Mark this post and the followings unread

that's strange.

i build this synth...

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

it haves...
11 modules
4 multipliers
it runs under MFOS wall wart perfectly.

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elmegil



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PostPosted: Sat Jun 21, 2014 8:06 am    Post subject: Reply with quote  Mark this post and the followings unread

This case is a bit larger than that Smile


https://plus.google.com/photos/102657837209811792502/albums/5792706164967909073/6027398213719110738?pid=6027398213719110738&oid=102657837209811792502
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