Home | ER-101 | ER-102 | ER-301 | Wiki | Contact

16N Faderbank is Happening

#129

Got my shipping confirmation today :+1:

1 Like

#130

My faderbank is on its way :tada:

1 Like

#131

@bpcmusic can you confirm the position of SDA SCL and GND are L > R when looking at the back of the txb when it is facing upright?

0 Likes

#132

@tomk

On the TXb, ground is marked by the white box on the PCB:

The two rows of pins to the right of ground are wired together. Since the TXb has no processor, it is indifferent to the signals passing down those lines. Pull-up is applied equally to them (when powered). That said, there IS a standard for the devices that connect to the pins and to the stereo 3.5mm jacks on the front.

To have a successful bus, here is the pin ordering:

GND > SCL > SDA

More info on i2c can be found in this very helpful guide:

1 Like

#133

Thank you! The issue lays elsewhere apparently–will report back to the thread once I have it up and running :+1:

1 Like

#134

I’ve gotten successful i2c communication of 16n > ER-301 via txb :partying_face: . No idea what the issue was–after a few power cycles it just…worked :man_shrugging:

I notice a bit of offset registering at minimum fader value (e.g. ~.015 minimum value when using a USB wall adapter, and ~.026 when plugged into my MBP). I erroneously assumed this would coincide with #define MINFADER 15 in config.h. Is the offset expected due to the nature of the 16n circuitry, or is this addressable in Arduino? On the other hand it might be a custom control solution w/in the 301…

0 Likes

#135

what kind of wall adapter are you using?

The offsets are to deal with component variances. When developing my small portion of the firmware, I found that there was some variance in the max and min values I would get out of the faders. The effect was that some faders wouldn’t make it to the full minimum value and/or maximum value. It felt quite broken. :wink: Adding in these small values for min and max worked to eliminate the problem across the six+ prototypes that I built.

Now - these prototypes were a bit different than the final version (they didn’t have the MUX chip on them). I wouldn’t think the circuit is behaving appreciably different in this regard between the versions, though.

It sounds like your wall adapter might be a bit hinky to give you that variance. If not - you can always adjust the min and max values to give you a little more tolerance on either end of the faders.

1 Like

#136

Just a general apple product mini-brick. I changed the power source to an Anker PowerCore 20100 battery, and it cut the minimum offset to .006. I also notice that different USB cables generate different offsets as well, the data cable generating less offset than the standard charging-USB.

So for other readers/posterity: power source and USB cable types matter!

Currently have MINFADER set to 0–will it accept a lower value?

Thanks for all your time and efforts @bpcmusic :trophy:

1 Like

#137

Um - unpredictable. Voltages measure from zero up on the Teensy.

Not sure why you would set a negative voltage. You want these values to encompass the very slight variance in your edge voltages on the faders so that they cover a predictable range.

On my Teletype input expander (TXi) I rely on calibration to manage these variances. Far better solution - but complex to get done for a 16n that never connects to a Teletype.

(edit)

Also - not a big deal for MIDI output due to the controller value resolution. More noticeable when connected to the ER-301 or Teletype.

1 Like

#138

Going for the most stupid question of the week: just received my faderbank, so when i connect it to my TXb with a short power cable do i also need to power it as well via the USB jack to the left of the i2c?!

1 Like

#139

Yep, it requires power via the micro-usb

1 Like

#140

Thanks!!!

Up and running & talking to my ER301, let the fun commence!!!

Did i read somewhere that there is some firmware to flip the orientation of the Faderbank?

1 Like

#141

If you can make the change yourself in arduino—in config.h make sure REV 1 and FLIP 1 are uncommented :+1:

1 Like

#142

Thanks, I’ll just stick with what I have then, not familiar with updating stuff with Arduino.

1 Like

#143

I know how that feels, but I would encourage you to look into it. It’s mostly about installing teensyduino and a few libraries, uncommenting those lines and pressing send.

I’m pretty much a complete beginner, but did manage it. Can try to assist in every way I can if it helps and you feel like taking it up.

2 Likes

#144

Hi Josker, thanks for the encouragement!! In actual fact @tomk already offered his assistance & with that assistance i managed to update my Faderbank this morning & all working well!!!

5 Likes

#145

That’s so nice, glad to hear it!

2 Likes

#146

Hi guys I got my faderbank from MS earlier this week and also installed the shunt to my rev 7 , Raph installed the pullup resistors and I have flashed the master hex to my 16n, I got a mininstereo cable going from the 16n to the ER and I followed the signal path the correct way I think, Now I know is a stupid question but how do I make it do a thing on the ER, I looked under connections and there is no signal of any kind, how do I assign a fader to the ER I guess is what Im asking, or even check to see if it made a connection, so far I dont see any activity and cant get anything to work , any help would be Appreciated!! also to clarify, Im trying to use the faderbank to control
The er I dont have a teletype

0 Likes

#147

http://wiki.orthogonaldevices.com/index.php/ER-301/Teletype_Integration

start at the bottom for configuration. then you’ll need to use the SC.CV units on ports 1-16 to get signals from the faders.

1 Like

#148

You rock!! Thanks a lot man!!we have lift off!!

1 Like