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 Forum index » DIY Hardware and Software » Stickney Synthyards
TR-808MC
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PHOBoS



Joined: Jan 14, 2010
Posts: 1751
Location: Moon Base
Audio files: 347

PostPosted: Sun Mar 30, 2014 7:33 am    Post subject: TR-808MC
Subject description: 3x TR-808 Cowbell clone
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I accidentally received some stripboard instead of the usual pad-per-hole perfboard, so I made 3 TR-808 cowbell clones using the beautiful stripboard
layouts posted by minus here.


this is how it looked before I added the oscillators and mixer to the board.


One cowbell will be tuned at the original TR-808 frequencies, the other two have adjustable tuning and besides the build in oscillators an external
source can be used aswell. I did some tests using a VCO which resulted in a short track posted here. Cool

I'm using 555's in monostable mode to provide a short trigger pulse which can be adjusted. It can also be switched to gate mode in which case the
trigger length is set by the trigger input signal. Each cowbell has it's own accent input and level control for which I used part of the original TR-808
circuit. The mixer circuit also came from the original TR-808 schematic.


TR-808MC.gif
 Description:
TR808MC: oscillators, mixer, accent & trigger control
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TR-808MC.gif



TR-808MC front.jpg
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TR-808MC: front panel design
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TR-808MC front.jpg



_________________
"My perf, it's full of holes!"
http://phobos.000space.com/ http://www.acidtrash.com/ Stickney Synthyards

Last edited by PHOBoS on Sun Mar 30, 2014 7:40 am; edited 1 time in total
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PHOBoS



Joined: Jan 14, 2010
Posts: 1751
Location: Moon Base
Audio files: 347

PostPosted: Sun Mar 30, 2014 7:40 am    Post subject: TR-808MC case Reply with quote  Mark this post and the followings unread

I cut some scrap shelves into pieces to make a case similar to the CR-78, I'll probably gonna stain the wood or treat it some other way.


TR-808MC case - 01.jpg
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TR-808MC case
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TR-808MC case - 02.jpg
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TR-808MC case
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TR-808MC case - 02.jpg



TR-808MC case - 03.jpg
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TR-808MC case
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TR-808MC case - 04.jpg
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TR-808MC case
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TR-808MC case - 05.jpg
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TR-808MC case
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TR-808MC case - 05.jpg



_________________
"My perf, it's full of holes!"
http://phobos.000space.com/ http://www.acidtrash.com/ Stickney Synthyards
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PHOBoS



Joined: Jan 14, 2010
Posts: 1751
Location: Moon Base
Audio files: 347

PostPosted: Mon Mar 31, 2014 6:03 am    Post subject: TR-808MC - wiring it up Reply with quote  Mark this post and the followings unread

wiring up the frontpanel (the lighter was there to hold some wires in place, forgot to take it out for the photos Embarassed )


TR-808MC wiring - 01.jpg
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TR-808MC - wiring
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TR-808MC wiring - 01.jpg



TR-808MC wiring - 02.jpg
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TR-808MC - wiring
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TR-808MC wiring - 02.jpg



_________________
"My perf, it's full of holes!"
http://phobos.000space.com/ http://www.acidtrash.com/ Stickney Synthyards
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PHOBoS



Joined: Jan 14, 2010
Posts: 1751
Location: Moon Base
Audio files: 347

PostPosted: Mon Mar 31, 2014 7:30 am    Post subject: TR-808 MC - more wiring Reply with quote  Mark this post and the followings unread

some more wiring (almost done) Cool


TR-808MC wiring - 03.jpg
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TR-808MC - wiring
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TR-808MC wiring - 03.jpg



_________________
"My perf, it's full of holes!"
http://phobos.000space.com/ http://www.acidtrash.com/ Stickney Synthyards
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RingMad



Joined: Jan 15, 2011
Posts: 226
Location: Montreal, Canada
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PostPosted: Mon Mar 31, 2014 1:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the wiring photos... looks lovely. Well, apart from needing MORE COWBELL!

James.
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elmegil



Joined: Mar 20, 2012
Posts: 1489
Location: Chicago
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PostPosted: Mon Mar 31, 2014 10:16 pm    Post subject: Reply with quote  Mark this post and the followings unread

Utterly brilliant panel. I want to hear it Smile
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PHOBoS



Joined: Jan 14, 2010
Posts: 1751
Location: Moon Base
Audio files: 347

PostPosted: Wed Apr 02, 2014 1:42 pm    Post subject: Reply with quote  Mark this post and the followings unread

thanks guys Very Happy

elmegil wrote:
I want to hear it Smile

did you hear MoooonCows ?
I tried to record some new sounds using the Bandersnatch to trigger the cowbells, but I ended up playing mostly with that one instead Cool

Here's a photo of it all wired up. I still have to drill some mounting holes, stain the case, and get some knobs (that might take a while).


TR-808MC wiring - 05.jpg
 Description:
TR-808MC all wired up
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_________________
"My perf, it's full of holes!"
http://phobos.000space.com/ http://www.acidtrash.com/ Stickney Synthyards
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elmegil



Joined: Mar 20, 2012
Posts: 1489
Location: Chicago
Audio files: 14

PostPosted: Wed Apr 02, 2014 2:46 pm    Post subject: Reply with quote  Mark this post and the followings unread

PHOBoS wrote:
elmegil wrote:
I want to hear it Smile

did you hear MoooonCows ?


I have now Very Happy Excellent....
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Skrog Productions



Joined: Jan 07, 2009
Posts: 774
Location: Scottish Borders
Audio files: 87

PostPosted: Sat Apr 12, 2014 10:38 am    Post subject: Reply with quote  Mark this post and the followings unread

Very nice build Phobos , love the panel Smile .... Max Zorran Very Happy
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