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 Forum index » DIY Hardware and Software
microLARGE 808 build
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LetterBeacon



Joined: Mar 18, 2008
Posts: 454
Location: London, UK

PostPosted: Tue Apr 02, 2013 7:02 am    Post subject: microLARGE 808 build Reply with quote  Mark this post and the followings unread

Hi there,

I'm looking at building the microLARGE 808 (http://xlargex.xl.funpic.de) using the three big boards.

Unfortunately the PSU PCB layout with the noise circuit on isn't on his site anymore. Does anyone have that at all?

I did a search on here and found this thread where there is some discussion about building it, but that's about it.

In it, there is mention of some mods to make the clap sound better. The mods were on the old eight-oh-eight site which is now gone. Does anyone have a record of these mods?

Thank you!
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Sebo



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

PostPosted: Thu Apr 04, 2013 5:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi:
I built the microLARGE 808 using the 3 big boards. Here is a video of mine:

http://youtu.be/GTSvuOEoI48



You can use any good regulated +15V -15V PSU, I used one based in 7x15 and a 1A transformer.
You don't need the noise circuit as it is included in one of the PCBs.
The polarity of C144 (in the Clap circuit) is inverted.
The jumper near D8 (in the Cymbal circuit) have to be omitted.
I think those are the most relevant warnings.
Also I did some minor changes to adjust the circuit to my taste.
If you find any difficulties in the building just ask me, I build it some years ago, but I think I can remember most of the process.

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inlifeindeath



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

PostPosted: Thu Apr 04, 2013 10:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

So dope! Thanks for posting and especially for verifying the boards (including revisions)! Working towards building my own, any suggestions for mods?
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LetterBeacon



Joined: Mar 18, 2008
Posts: 454
Location: London, UK

PostPosted: Fri Apr 05, 2013 1:04 am    Post subject: Reply with quote  Mark this post and the followings unread

Sebo,

I'd never seen that video before -what a fantastic build, top work!

I was looking at the schematics and I couldn't see a reason why a 3PDT switch couldn't replaces the three switches used to switch between toms and congas. What am I missing?

How are you controlling the 808?

inlifeindeath -there are a list of mods on the microlarge site.
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sneakthief



Joined: Jul 24, 2006
Posts: 529
Location: Berlin

PostPosted: Fri Apr 05, 2013 8:28 am    Post subject: Reply with quote  Mark this post and the followings unread

LetterBeacon wrote:

I was looking at the schematics and I couldn't see a reason why a 3PDT switch couldn't replaces the three switches used to switch between toms and congas. What am I missing?


You're missing the fact that sometimes you want to mix congas and toms Wink

Re. mods - here's my list with a few extra that the microLARGE site doesn't list:

http://midibox.org/forums/topic/15889-mb-808-first-test/?p=140364

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LetterBeacon



Joined: Mar 18, 2008
Posts: 454
Location: London, UK

PostPosted: Fri Apr 05, 2013 9:03 am    Post subject: Reply with quote  Mark this post and the followings unread

Love the demo -sounds fantastic!

sneakthief wrote:


You're missing the fact that sometimes you want to mix congas and toms Wink


Ah I see, so by toggling just two switches, instead of all three for example, you get a mix between the two?
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sneakthief



Joined: Jul 24, 2006
Posts: 529
Location: Berlin

PostPosted: Fri Apr 05, 2013 9:23 am    Post subject: Reply with quote  Mark this post and the followings unread

LetterBeacon wrote:


Ah I see, so by toggling just two switches, instead of all three for example, you get a mix between the two?


I'm assuming as much. Well not a mix, per se but likely some kind of weird in-between setting.

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Sebo



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

PostPosted: Sat Apr 06, 2013 9:57 am    Post subject: Reply with quote  Mark this post and the followings unread

The switches changes different things, one sets the pitch envelope (toms have pitch envelope, congas don't), another sets the pitch (low pitch for toms, high pitch for congas), and the last one sets the reverb (toms have reverb, congas don't). So you can change the setting to get something in between the toms and congas. I love the congas with the reverb on.
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Last edited by Sebo on Tue Apr 09, 2013 7:46 am; edited 1 time in total
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LetterBeacon



Joined: Mar 18, 2008
Posts: 454
Location: London, UK

PostPosted: Tue Apr 09, 2013 1:51 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks Sebo, that's much clearer now.

How are you controlling your 808? I was planning on building it into my modular, taking the clock out from my Midibox CV and using it to trigger the various voices.

You are using your piano roll in your DAW, which seems like a much better way of doing it. How are you doing it?

Thanks.
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Sebo



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

PostPosted: Tue Apr 09, 2013 7:50 am    Post subject: Reply with quote  Mark this post and the followings unread

I used a modified version of the MIDIbox CV, I buil it before MIDIbox 808 exists.
The triggers works well, but I have some problems with the accent, so I will change the MIDI interface in the future.

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