Expert Moders needed
I’ve started moding (2 dee’s?) my oxygen 8 and i need some more info and i thought this community could help me out.
I want to replace the buttons or the keys with arcade buttons from dj techtools . I just don’t know where to start
and the other side of the board
got any ideas on where to start testing?
Thanks a lot every one!
Switches should have 2 wires… one in, one out.. .if the switch is on, the 2 wires are connected. Looks like (from pic 1) that the switches are on the PCB, and that the ‘switch’ simply contacts the 2 oval pads to create a circuit.
Therefore in order for you to replace the standard switches with arcade buttons, you just need to solder a wire to each of the pads, and then onto each side of an arcade button.
To test that these are indeed the switches, connect 2 of the oval pads (using something metal) and see if you button is activated on the Oxy8.
Did that make sense. Msg back if not.
Wide angle photo of whole board might help also 
The PCB is actually routed in what looks to be a three wire config. You can see the traces flow from pad to pad, pad to ground, and v+ to pad. You would need to emulate the four pads as closely as possible.
i’ve found that 2 of the connections, One sending a note on and One Sending note off signal. I’ve been successful in connecting a arcade button to start the Note on signal BUT i need to some how create the note off signal with the same button.
Any other suggestions?
Just a guess, but the pads are probably arranged for velocity switching. The carbon buttons in the membrane hit the pads just slightly apart. The faster you hit, the shorter time between the two switch closures. Faster=higher velocity. Most keyboards use this type of switch. You would probably have to switch both sets of pads at once. Hope that helps
Thanks for your insight Opadave, That totally makes sense. now i have to figure out how to do that with out that particular pad config
Does that ribbon cable connect the switches to the main control board? Connecting to this would save the pain of soldering to the tracks on the PCB.
The nano project i’m in the middle of had the same(ish) problem.
ya i does. no i just have to figure out how to create a note on and note off signal.
This guy did it, why don’t you ask him.
http://fakemoneynyc.com/2010/06/02/if-you-build-it-you-will-have-blown-at-at-least-a-week-of-your-life/
I don’t have a problem with the note on/off … when i use the pots though, i get three values, it’s a matter of twisting until traktor accepts the one in the middle … then it works okay. Don’t know how you’ll do that with buttons.
For stuff you can’t make it do natively, you need the “midi-masher” or bomes to reprogram the outputs.
I know about fake moneys unit ,i’ve referenced him in my build log, only problem though he destroyed his first unit, and it looks like he didn’t use the buttons on the nano, choosing a numberpad modification instead.
DUDE! thanks for this! thats Freakin awesome!
