[Turnthetables]

thank you much sir... tallyho... I just always wanted to say that... do ppl on the other side of the pond say that alot?

[Theta_Frost]

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other cool stuff (like traktorizer compatibility).

The dumb way I see it, couldn't you just route this nice encoder and stuff, through a jack on the bottom of the traktorizer, and using a switch to switch it?  I think it would work.;)

[stryd_one]

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thank you much sir... tallyho... I just always wanted to say that... do ppl on the other side of the pond say that alot?

I say it whenever I'm flying towards a focke-wulfe with the sun behind me.

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other cool stuff (like traktorizer compatibility).

The dumb way I see it, couldn't you just route this nice encoder and stuff, through a jack on the bottom of the traktorizer, and using a switch to switch it?  I think it would work.;)

It's just a planning/coding issue - like, making sure the required pins are available in the standard design without mods, making the software support the high-res encoder driver module by using a makefile-specified #define, creating said driver module, etc. Nothing difficult, will only take a couple of hours in the chatroom :)

[nILS]

Sorry for the OT.

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I say it whenever I'm flying towards a focke-wulfe with the sun behind me.

ROFL. I don't usually roll around on the floor a lot but that one did it ;D

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Nothing difficult, will only take a couple of hours in the chatroom :)

"Yeah, we do all our programming in the chat room - it's like a real-time SVN"

[stryd_one]

Hahahah realtime SVN is right :)

heh, I originally wrote messerschmitt (mmmm, bf-109. Lovely.) but focke-wulfe seems so much more obscene :D

Pip, pip, tally ho!

[Turnthetables]

Ok,  my MBHP has arrived! Woohoo! I'm going to build tommorrow with my electronics/programming buddy who is interested in what I'm up to. What needs to be changed in the code for it to work with this r9 resistor in place?  I'm willing to write code ( would be my first Mios app, but I've coded before) if you can explain what needs to happen... psuedocode or words.. anyhow you want to explain....

[rasteri]

Line 108, change :

capsense+=PORTDbits.RD1;

to:

capsense+=PORTDbits.RD0;

Then wire the touch sensor into pin RD0 instead of RD1. That enables you to keep R9.

[Goblinz]

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thank you much sir... tallyho... I just always wanted to say that... do ppl on the other side of the pond say that alot?

Not really, it's a fox hunting term. Only seems to be used when people are taking the piss.



Any chance of some MP3 samples of this.

I was wondering if there's some way to "increase" the resoulution by having certain marker quadrants (ie red markers with black ones every so often and a a seperate sensor with a red filter) so that a PIC could be used to add extra pulses. IE 2 Marker quadrants within a certian time would give 20 pulses. Just a suggestion, prolly don't know what I'm talking about.

[Turnthetables]

My Midibox is almost done, I'll post pics soon... Now Rasteri... I cam across this recently and I was wondering if this would work...

http://www.instructa..._into_a_rotary/

It's an Instructable about using a HDD as a Rotary device.... I Have 3 Old HDD's laying around that I'm willing to bust open but, my question is... they add "comparators" to the unit. The Midibox chip has them built in correct? your code uses um, So could I just wire up a HDD in place of the optical encoder and get the same results?

Thanks,
TurntheTables

[rasteri]

Yeah I saw that story. There are a few problems involved in using an HDD motor for this project -

1) They have a much lower resolution than we need - something like 400 steps per resolution, which isn't really enough IMHO.

2) The signal they produce is different - it uses 3 lines instead of 2. Coding around this would be pretty easy, but *I'm* not going to do it because of reason 1. Feel free to have a go yourself.

3) Related to point 2, the PIC only has 2 comparators. They can be multiplexed, or you could just use external comparators like that guy you linked to did.

In all honestly, you're better off with an optical encoder. Those HD motors make great bearings though - you could attach an encoder wheel to it perhaps?

[Turnthetables]

The bearing is a good Idea... I'm going to see what I can do...

[matt_kronik]

After reading the Skratchworx article, I sought out this project.  I'd like to build one, but I've got a few questions:

• I have a laptop, hence, no MIDI card.  Do I need a USB to MIDI or Firewire to MIDI adapter if I want to connect this device to my PC?
  
• I have no background in programing (but I'm not a fool!).  How difficult would it be for me to get a device like this working
  
• For rasteri: is this device connected to a more sophisticated piece of hardware, like FinalScratch or Native Instruments Traktor Scratch, or is it fully independent?

That's all I can think of for now.
Later!

[ademir]

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Those HD motors make great bearings though - you could attach an encoder wheel to it perhaps?

Well, i harvested a motor from a 40 Gb old Samsung HD today. It looked like this:

http://img515.images...dsc02630qy8.jpg
http://img515.images...dsc02630qy8.jpg

It's cool because you can attach a shaft on that screw. I was able to take another 2 rings off, like this:

http://img240.images...dsc02631fq0.jpg
http://img240.images...dsc02631fq0.jpg

NOW, you see that little circle on top? Check this out:

http://img101.images...dsc02634tf1.jpg
http://img101.images...dsc02634tf1.jpg
(rainbows not included)

Cool, huh? :D
I'll get an encoder out of this motor just like that one, some posts back :)

- a

[rasteri]

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I have a laptop, hence, no MIDI card.  Do I need a USB to MIDI or Firewire to MIDI adapter if I want to connect this device to my PC?

Yup. They're not too expensive, I got my USB->MIDI adapter on ebay for under £10.

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I have no background in programing (but I'm not a fool!).  How difficult would it be for me to get a device like this working

You won't need to do any programming. All you need is a midibox core module kit (buy from smashtv, get one with a preprogrammed PIC18F4620) and a soldering iron.

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For rasteri: is this device connected to a more sophisticated piece of hardware, like FinalScratch or Native Instruments Traktor Scratch, or is it fully independent?

It's connected to a PC running Traktor. I have built a prototype version that is completely standalone and is powered by batteries, but I'm in the middle of porting it to a dsPIC (for lower power consumption and cost) and that will take another month at least. Rest assured I will make details available (including source code) when I'm done.

[rasteri]

And ademir, that's very cool. Those things would make amazing jog wheels.

[Turnthetables]

ademir,

Can you read Minds? I'm actually posting pictures of hdd jog wheel mount... I grinded (ground isn't a word in this sense, right?) the base of the enclosure to be flat and I'm going to mount the encoder wheel on the base of the HDD spindle, use that cool little spacer to give me some space ;) and mount the jog wheel (CD) on top. now rasteri, If i were to connect the touch sensor wire to the spindle with a conductive jog wheel on top would it work? The spindle is aluminum I believe, But don't quote me on that...

[ademir]

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ademir,

Can you read Minds?

actually, i'ts a natural gift. And a curse... :P

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I'm actually posting pictures of hdd jog wheel mount... I grinded (ground isn't a word in this sense, right?) the base of the enclosure to be flat and I'm going to mount the encoder wheel on the base of the HDD spindle, use that cool little spacer to give me some space ;) and mount the jog wheel (CD) on top.

I gave up of this idea early today. Don't get me wrong, it's gonna work that way, but i'll use some bearings and a shaft and make an encoder from scratch. from scratch, get it? :P
I think that it'll be better if you get as little connections as possible between the jog wheel and the encoder disc.

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now rasteri, If i were to connect the touch sensor wire to the spindle with a conductive jog wheel on top would it work? The spindle is aluminum I believe, But don't quote me on that...

Get a multimeter (if you're going to build a midibox, it's good to have one around anyway) and do a continuity test. If it works, go ahead.

About the touch sensor, you guys are aware of the QT113 IC? it's a touch sensor itself. it can work as a proximity sensor, too. attach some caps and a wire would do the trick. Here in Brazil, i can get one of these for about 10 euros. You guys can get it cheap.

later,

- a

[cimo]

.. check out skate/inlines bearings, they can be found anywhere iirc there is a 6mm hole

[ademir]

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.. check out skate/inlines bearings, they can be found anywhere iirc there is a 6mm hole

the nsk 608 bearing has a 8mm hole, which is very close of a real turntable platter shaft (i don't have any turntables or discs here right now). it's used on skates/inlines, too ;D

as soon as i get some drawing on, i'll post it here, to see what you guys think.

later,
-a

[cimo]

plus metal tie zip (those with a screw to tighten) and 3 screws pointing downward.An 8 mm bolt with some washers and nuts to fix the cd/disk.