BOSS DR-110 mods

am4d · Joined: Nov 08, 2012 Posts: 4 Location: UK

Hey guys
I'm going to mod this 110 I've picked up and was hoping for a little advice.

Would anyone recommend using any particular apms for the individual outs or are they loud enough as it is?

Regarding the trigger inputs; Is it plausible to do this using an arduino? Only because I have one laying about. (Never used PIC before either)
I don't think you can get negative voltage from an arduino, but maybe the arduino and 4049 can achieve this? I'm thinking the arduino might not need the 4050? (What does the 4050 do?)

Failing that i'll take the PIC route, but i'm not sure where to begin with that...

I was thinking out mounting it all with *tonal* mods in a little hammond case for triggering with modular ect.
Sorry for all the vague questions
Any advice you guys can give would be swell Wink

creekree · Posted: Sat Nov 10, 2012 2:44 pm Post subject:

what do you want to use the arduino for?

adding trigger inputs to the dr110 is trivial - look at the schematics and identify the trigger input lines on the ribbon cable that connects the two boards.
to use a trigger signal with those inputs, you will need to convert it from v-trig to s-trig (which means, a simple short to ground).

use the "moog trigger converter circuit" to do that.
http://www.cyborgs.de/synthesizer/faq/V-S-Trigger.JPG

THeff · Posted: Sat Dec 15, 2012 7:46 pm Post subject: Perfboard Dr-110 Voices

This is my second post today. The first was about the Hammond B3 Propeller, and this one is about another project I have been working on the last few weeks. I have never owned a DR-110 or played with one, so I decided to try and perfboard all of the DR-110 voices and see what they sounded like. Here is a little demo of the perfboard. I mentioned the Propeller B3 post because I am using the same MIDI file here but this time all of the instruments in the MP3 demo are from a Yamaha MU-50 except the drums. All of the drums are from the DIY DR-110 board. I used BC550 and BC560 transistors throughout except for the snare drum, that was a 2SC945 with a very high HFE.

The row of eight transistors in the top middle of the board are inverters and signal conditioners for the triggers. The blue DIP resistor array are the eight input triggers. I am going to add a small 8 pin PIC microcontroller to provide the the four sequential triggers needed for the clap voice.

Regards,

Theff

DIY Perf DR-110.jpg

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Green Eyed Lady - DIY DR-110 Drums.mp3

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Dan Lavin · Posted: Tue Dec 18, 2012 11:54 am Post subject:

Theff:
That is some crazy amount of perfboarding! I thought of doing this in the past but knowing the number of connections made me sober up! Wink

I ended up buying a less-than-perfect DR110 for a reasonable price and completing it that way. Feel free to use my PicAxe program to do the hand clap triggers. Nice job!

THeff · Posted: Tue Dec 18, 2012 6:00 pm Post subject:

Hey Dan,

Thanks, I started out just wanting to see what the cymbals sounded like and then couldn't stop building. I built each voice one at a time and tested them as I went along. Thanks for the PicAxe suggestion!

Regards,

Theff

richardc64 · Posted: Wed Dec 19, 2012 7:49 am Post subject:

THeff · Posted: Wed Dec 19, 2012 5:52 pm Post subject:

Thanks richardc64!

I was surprised how good the OH, CH, and Cymbals sounded compared to most of the white noise/multi-oscillator circuits that I played with before. That's what kept me building the additional voices. Boss really did their homework when they designed the filters and VCA envelopes for the DR-110. Simple but very effective.

Theff

MusicMan11712 · Posted: Tue Jan 08, 2013 6:25 pm Post subject:

I love this song. It is a classic from the early '70s and it shows off your drums quite nicely.
Steve

Uncle Krunkus · Posted: Wed Jan 09, 2013 3:48 am Post subject:

A beautiful,
Awe inspiring,
and, given my current, chaotic, construction circumstances,....
slightly frustrating build.

Paradigm X · Joined: Feb 15, 2011 Posts: 254 Location: Null and void

Yeah brilliant job THeff, awesome.

I saw your perfboarded klee too, crazy.

creekree · Posted: Wed Jan 09, 2013 12:55 pm Post subject:

Holy sh.. THeff!

That is some lovely breadboarding!
Would you mind sharing the PIC code? I totally forgot about those four essential clap triggers. I modded mine years ago - and it has been on constant loan to a friend in Belgium BUT I he is coming over next month, and he will bring it back!
I think I will work on it some more then.

THeff · Posted: Thu Jan 10, 2013 5:02 pm Post subject:

Thanks Guys!

I have only done a very quick and dirty version of the PIC code using a 12F675. I am going to clean it up soon and will certainly post it here when it's done.

Regards,

Theff

maxdemian · Joined: Jan 29, 2011 Posts: 4 Location: berlin

As I am modding my DR110 at the moment I just want to add one thing that is maybe quite obviuos but I did not find any Information about it:

If you are like me not up for making a PXACE controlled Clap trigger thing,
but want the clap to be triggered externaly just go straight to the buttons on the digital board.

I first tried to cross the points with some transistor, but somehow this was behaving very very sensetiv and did not work for me.

So what I am using now is this optocoupler: http://www.alldatasheet.com/datasheet-pdf/pdf/88206/HP/HCPL-817.html

I also thought of using the 4016 or 4066 but I just found these optocouplers lying around, so i am using them now, works perfectly with my highly liquid md24.

Also on the clap! Smile