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 Forum index » DIY Hardware and Software
TR808 kick pcb
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SubG (deactivated)



Joined: Oct 09, 2009
Posts: 70

PostPosted: Fri Sep 09, 2011 11:48 pm    Post subject: Reply with quote  Mark this post and the followings unread

Sebo wrote:
Hi:
Here are some pictures of my TR-808 clone, also the TR-9090 (909 clone) and some other nice gear (DIY and non-DIY).


Nice!
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wizardsofzen



Joined: Jan 08, 2011
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Location: Zion

PostPosted: Sat Sep 10, 2011 6:53 am    Post subject: 808 mods Reply with quote  Mark this post and the followings unread

i know im blind, is there a page that has the mods collected to add the extra control to Eric Archers layouts?
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v-un-v
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PostPosted: Sat Sep 10, 2011 8:05 am    Post subject: Reply with quote  Mark this post and the followings unread

Sebo wrote:

Here are some pictures of my TR-808 clone, also the TR-9090 (909 clone) and some other nice gear (DIY and non-DIY).


That's a nice bit of DIY 909 going on there! Does it sound anything like the original?

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brother303



Joined: Nov 02, 2010
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PostPosted: Sat Sep 10, 2011 9:22 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Sebo,

awesome! The 8080 is absolutely awesome!!!

Exactly what I need next to my 9090...

wow!

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Sebo



Joined: Apr 27, 2007
Posts: 541
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PostPosted: Sat Sep 10, 2011 2:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi:
Thank you all for the comments!!!

The TR-9090 project is here:
http://introspectiv.org/
You can still buy PCBs.

The mods for the 808 are here:
http://xlargex.xl.funpic.de/
Actually the project includes the mods, but you can find the differences with the original.

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decaying.sine



Joined: Aug 31, 2009
Posts: 92
Location: New Haven, CT, USA

PostPosted: Mon Sep 12, 2011 4:05 am    Post subject: Reply with quote  Mark this post and the followings unread

I'd be in for single voice PCBs too!
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corex



Joined: Mar 02, 2010
Posts: 114
Location: Las Vegas

PostPosted: Tue Sep 13, 2011 10:25 am    Post subject: Reply with quote  Mark this post and the followings unread

...and my axe!

I mean, I would also love to buy single-voice PCBs.
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Dougster



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

PostPosted: Mon Sep 19, 2011 10:59 am    Post subject: Reply with quote  Mark this post and the followings unread

OK, I finished the three voice only boards (four voices per board), now it's time to lay out the individual voice boards. Do you guys care what the form factor is? In other words, should I just make the boards as small as possible with mounting holes on the corners, or should I try to make them fit a particular bracket or front panel?
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emdot_ambient



Joined: Nov 22, 2009
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PostPosted: Mon Sep 19, 2011 2:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

I would suggest making them as small as possible with Euro formats in mind (possibly with pot and jack pads for PCB mount components), but also with mounting holes so that those of us who don't like to use panel mounted pots can mount them on a bracket.

For most universal appeal, probably good to allow several types of power connectors...what voltages do these run on? I'm sure you'll get a mix of people using -/+12V and -/+15V on their systems.

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Dougster



Joined: Sep 20, 2005
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PostPosted: Mon Sep 19, 2011 2:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

I've always run these things at 15V. I have a bench power supply; I'll test at 12V and see how that sounds...

EDIT: P.S. I don't have any Euro stuff, but I'll check out the format specs. (I have mainly MOTM, with a bit of Blacet.)

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Paradigm X



Joined: Feb 15, 2011
Posts: 286
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PostPosted: Mon Sep 19, 2011 4:07 pm    Post subject: Reply with quote  Mark this post and the followings unread

Dougster wrote:
OK, I finished the three voice only boards (four voices per board), now it's time to lay out the individual voice boards. Do you guys care what the form factor is? In other words, should I just make the boards as small as possible with mounting holes on the corners, or should I try to make them fit a particular bracket or front panel?


Awesome !

What are on each board ?

Cheers!

Ben
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Dougster



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

PostPosted: Mon Sep 19, 2011 4:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

Paradigm X wrote:
What are on each board ?

There are four voices on each board. I nicknamed the boards "white", "pink" and "schmitt" because most of the voices depend upon one of those sound generators. (Only the kick and rimshot don't.)

The first board has:

Kick
White noise generator
Snare (uses white noise)
Maraca (uses white noise)
Clap (uses white noise)

Second board has:

Pink noise generator
Low Tom (uses pink noise)
Mid Tom (uses pink noise)
High Tom (uses pink noise)
Rimshot/Clave

Third board has:

Schmitt oscillators
Cowbell (uses Schmitt)
Cymbal (uses Schmitt)
Open Hat (uses Schmitt)
Closed Hat (uses Schmitt)

I also thought about having two boards, one with the noise generator and the six voices that depend on it and a second board with the schmitt circuit and the four voices that depend on it plus the kick and rimshot:

Snare
Low Tom
Mid Tom
High Tom
Maraca
Clap

Kick
Rimshot/Clave
Cowbell
Cymbal
Open Hat
Closed Hat

Those seemed to be the two most logical combinations.

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Paradigm X



Joined: Feb 15, 2011
Posts: 286
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PostPosted: Mon Sep 19, 2011 5:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

Amazing Smile

Any idea when these might be ready for purchase (sorry, very early days i know). Boards 1 and 3 for me for a start, then 2.

Cheers
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Dougster



Joined: Sep 20, 2005
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PostPosted: Mon Sep 19, 2011 5:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

Can't give you a firm date at the moment. I'll be out of town on business until October 15. The prototype boards should be here when I get back, so I'll build them and make sure there are no problems. There shouldn't be any problems, since these are the same circuits I use in the MB-808, but I may have made a mistake somewhere, so I'll build prototypes just to be sure. Once I have built a good prototype, I'll have a stack of pcbs made and then let everyone know they're available... Smile

The full MB-808 is the highest priority project in my queue right now and I don't plan to ship anything else until this batch of MB-808 kits is out the door. Heck, I haven't built anything for myself for over two years... Sad

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SubG (deactivated)



Joined: Oct 09, 2009
Posts: 70

PostPosted: Mon Sep 19, 2011 9:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

wave
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Paradigm X



Joined: Feb 15, 2011
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PostPosted: Tue Sep 20, 2011 1:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Dougster wrote:
Can't give you a firm date at the moment. I'll be out of town on business until October 15. The prototype boards should be here when I get back, so I'll build them and make sure there are no problems. There shouldn't be any problems, since these are the same circuits I use in the MB-808, but I may have made a mistake somewhere, so I'll build prototypes just to be sure. Once I have built a good prototype, I'll have a stack of pcbs made and then let everyone know they're available... Smile

The full MB-808 is the highest priority project in my queue right now and I don't plan to ship anything else until this batch of MB-808 kits is out the door. Heck, I haven't built anything for myself for over two years... Sad


That's awesome gives me a chance to save up a bit. Many thanks Smile
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brother303



Joined: Nov 02, 2010
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PostPosted: Tue Sep 20, 2011 9:51 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Doug,

Dougster wrote:

I also thought about having two boards, one with the noise generator and the six voices that depend on it and a second board with the schmitt circuit and the four voices that depend on it plus the kick and rimshot...


That´s what I like best. Two boards would be cool!

afro

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emdot_ambient



Joined: Nov 22, 2009
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PostPosted: Tue Sep 20, 2011 12:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

Yeah, actually the 2-board idea looks pretty ideal.
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Dougster



Joined: Sep 20, 2005
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PostPosted: Wed Sep 21, 2011 10:08 am    Post subject: Reply with quote  Mark this post and the followings unread

Thought I should publish some of the details of the multi-voice boards in case anyone has heartburn about the way I'm doing this...

There is no power supply on the voice boards, that is, no regulators, so a separate +/-15V power source is required. (I have not tested with +/-12V, so I don't know how that will work.)

There are three headers for each voice, a three pin trigger and accent input header, a two pin sound output header, and a header for controls (Potentiometers and switches.)

There is no LED driver. I was thinking that could be included on whatever sends the trigger pulse. Is that a problem?

The individual voice boards will be similar, but I'll look at using pcb mount potentiometers for panel mounting.

(Should I start a new thread for all of this, or should I continue to hijack this one?)

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brother303



Joined: Nov 02, 2010
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PostPosted: Wed Sep 21, 2011 11:26 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Doug,

sounds good to me.

Very Happy

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emdot_ambient



Joined: Nov 22, 2009
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PostPosted: Wed Sep 21, 2011 12:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

The way you're doing it sounds fine to me, too.

It's DIY. If people want/need an LED driver for the inputs, they can always add them, or do as you suggest and just use the trigger source.

What kind of trigger do these need, BTW?

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Paradigm X



Joined: Feb 15, 2011
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PostPosted: Wed Sep 21, 2011 12:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

Agreed, however you see fit Very Happy
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Skrog Productions



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PostPosted: Wed Sep 21, 2011 2:25 pm    Post subject: Reply with quote  Mark this post and the followings unread

I like the idea of 2 boards as well for my new diy drum sound module .

Maybe a new thread just to clarify who wants a 2 pcb whole sound set or individual pcb voices , would be a good idea Smile


Thanks for spending time on this Doug , your a star Smile

Dave

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SubG (deactivated)



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PostPosted: Wed Sep 21, 2011 9:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

no psu on board, +/- 15v

PERFECT ,can't wait to order
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fonik



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PostPosted: Wed Sep 21, 2011 11:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

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