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 Forum index » DIY Hardware and Software
My DIY drum machine
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23isgood



Joined: Nov 18, 2006
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PostPosted: Fri Sep 28, 2007 11:24 pm    Post subject: My DIY drum machine
Subject description: finally finished it
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Hi folks. I wanted to share a project I just finished. Its a drum box containing the following,

TR808 kick and snare
Thomas Henry's UD1 Drum Voice
CGS Dual Drum
CGS Dual Chime
CGS Cynare

The sequencer is a modified circuit by Blacet. "The Voltage Controlled Clock with event Generator". Sheesh, great name!

http://www.cyndustries.com/synapse/synapse.cfm?pc=59&folder=jan1978&pic=45

Basically, its a gate sequencer with a set of eight switches for each drum sound. I spent way too much time building this thing. Now its time to make some tunes!

I made a few video demos today, check them out.

http://www.youtube.com/watch?v=E3g0rla_1oU

http://www.youtube.com/watch?v=5ghHi-hcVwA

pete


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EdisonRex
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Joined: Mar 07, 2007
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Location: London, UK
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PostPosted: Sat Sep 29, 2007 2:01 am    Post subject: Reply with quote  Mark this post and the followings unread

Very nice. The sound is reminiscent of a Roland CR78. I like it.
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andrewF



Joined: Dec 29, 2006
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Location: australia
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PostPosted: Sat Sep 29, 2007 2:55 am    Post subject: Reply with quote  Mark this post and the followings unread

great job!

good choice with the Blacet clock, it was the heart of my old modular (now in storage). you should get some nice beats messing with those switches.
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toybox



Joined: Aug 03, 2005
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Location: chicago/peru,illinois usa

PostPosted: Sat Sep 29, 2007 6:12 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice !!!
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Rykhaard



Joined: Sep 02, 2007
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PostPosted: Sat Sep 29, 2007 10:10 am    Post subject: Reply with quote  Mark this post and the followings unread

Wow! Great to see someone having built a 'drum machine'! Nice timbres in your percussion sounds as well! Shocked

I'm JUST around the corner now, of starting design for my 1st 'drum machine'. It'll be a controller only, as the rest of my synth. will provide the palettes for drum sounds. (Including 1 1/2 Cynares).

Did you use PC mount slide switches? I'm now, looking for a source, as I only have wire mount ones.
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23isgood



Joined: Nov 18, 2006
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Location: San Francisco, CA bay area
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PostPosted: Sat Sep 29, 2007 12:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

You know it kinda does sound like a CR78. Maybe its the Cynare that has that sound. I forgot to mention that I modified the Blacet design. I used the clock from the CGS Digital Noise, and I used the clock input from the CGS ASR. I added five more sets of switches too.

Instead of the 4013, I built eight CGS gate to trigger converters. The switches I used are pcb mount. The sequencer works great, though you have to understand how the switches work or you will set off a drum sound and it will be off time. You probably heard it in some of my demos.

There are a few things that still need to be ironed out, but for the most part its working.

Thanks guys, for the good word!

pete

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Peake



Joined: Jun 29, 2007
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PostPosted: Sat Sep 29, 2007 4:09 pm    Post subject: Reply with quote  Mark this post and the followings unread

That looks like a lotta fun!
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goodrevdoc



Joined: Sep 11, 2006
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PostPosted: Sat Sep 29, 2007 9:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

awesome, great samples. makes me want to push life out of the way and build some stuff!
-justin
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23isgood



Joined: Nov 18, 2006
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PostPosted: Sun Sep 30, 2007 12:58 am    Post subject: Reply with quote  Mark this post and the followings unread

Well I did a lot of pushing and rushing to get this done before school started again. This has taken me a huge amount of time to build. I didn't realize how much work this was going to take. If I had better tools, I would have finished sooner.

I just finished jamming, and its so much fun! It was worth all the effort I put into building it.

pete

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MIKEFORD



Joined: Nov 13, 2006
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PostPosted: Sun Sep 30, 2007 5:12 am    Post subject: Reply with quote  Mark this post and the followings unread

GREAT! I would love to get a few of Marc Brailles ds7 or ds8 circuits together with a clock circuit like this and blast away! Drum machine DYI is kinda sparse, so your project is Quite inspiring!
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loss1234



Joined: Jul 24, 2007
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PostPosted: Sun Jan 11, 2009 8:07 am    Post subject: Reply with quote  Mark this post and the followings unread

amazing

i am just starting to try and get into building things like drum machines or pattern makers so this is really inspiring...lets me know it CAN be done.

so did you have to modify any of the drum circuits to work with the clock?

how did you go about adding the switches to the clock?

can you go into more detail as to what all the jacks are/or maybe a block diagram?
thanks

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23isgood



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PostPosted: Sun Jan 11, 2009 2:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

I had to modify the 808 sounds to accept triggers, but that was it. The other modules already have trigger conditioners built in. Unfortunately I don't remember what the jacks are, but I do have a drawing of everything somewhere. I really need to label everything, I just never got around to doing it since its a huge pain.
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loss1234



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PostPosted: Sun Jan 11, 2009 2:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

hmmm..can you explain what you had to do to "trigger" the 808 sounds?
i have never tried building any of those sounds before

thanks

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23isgood



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PostPosted: Sun Jan 11, 2009 3:18 pm    Post subject: Reply with quote  Mark this post and the followings unread

I built the, "Trigger conditioner with status indicator" from Thomas Henry's, "Electronic Drum Cookbook". I built two onto a protoboard and wired each to the 808 drum modules. Get that book its excellent, it helped me in building my drum box. The trigger is coming from my MFB drum sequencer, I don't use the Blacet clock thing any more since its not working, and I don't have time to troubleshoot it.

pete

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Photon



Joined: Mar 22, 2005
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PostPosted: Mon Jan 12, 2009 10:23 am    Post subject: Reply with quote  Mark this post and the followings unread

I built the Blacet VC Clock w/Event Generator a few months ago. Its a really cool module.

testing...


event-guts
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loss1234



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PostPosted: Mon Jan 12, 2009 10:29 am    Post subject: Reply with quote  Mark this post and the followings unread

AMAZiNG~~

where did you get those cool switches?

great work

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Photon



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PostPosted: Mon Jan 12, 2009 11:19 am    Post subject: Reply with quote  Mark this post and the followings unread

loss1234 wrote:
AMAZiNG~~

where did you get those cool switches?

great work


Thanks. Those switches are Mountain brand pcb-mount SPDT slide switches. They're $0.36 ea, cheaper if you buy 50+. Mouser part number: 10SP001

here's another:
Event Arranger
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probablyjoel



Joined: Aug 31, 2008
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PostPosted: Thu Jan 15, 2009 9:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

Where did you happen to get that really awesome paddle switch?
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