#251

I’ve had someone snap the USB port off of the teensy for one of the builds I sent out. Can anyone suggest the best way to go about repairing this?

#252

Probably means replacing the teensy.

#253

The laser cutting company I’m using have told me that the pdf and dxg sizing is inconsistent? Apparently the dxg sizing is 259 wide where on the pdf drawing it’s only 254. Can anyone tell me which one is correct? I’m leaning towards dxf being the source of truth here.

#254

Looks like something changed with the panel files from v131 to v132:

16n-132-top.dxf is 259x136mm

The versions I used to make panels was from 16n-131 and that matches the pdf at 254x125.73

#255

Aha thanks. I’ll double check the @MichiganSynthWorks pcb version

#256

First one up and running!

IMG_4592
IMG_4592.jpeg3024×4032 2.99 MB

2 Likes
#257

Impressive…
how does it output CV? directly or via another component?

#258

Straight out the back. One jack per fader

#259

That’s a fuckup. Should be 254. I will investigate.

#260

I was having a funky issue w 16n earlier this week. Current setup is the 16n going into a TXb which is hooked up to ER301. No other i2c devices. I was having an issue where once the system was up, one fader would report a high signal no matter what position it was in. I checked the voltage coming out of the corresponding cv jack and it was fine, so it seems like the fader itself is fine.

Tried restarting to no avail. Eventually without trying anything different, it righted itself. Wondering if anyone has any idea what could cause this and if there is a more reliable way to get it working right if the problem returns.

#261

So I finally got around to building mine and finished the hardware side of things last weekend, except none of the faders actually does what it’s meant to. In the web test, they alternate between one fader sending two adjacent CCs, and the next fader doing nothing. As per the docs, I assume this is a mux issue, so I’ll be reflowing all of those when I get a chance. They are all oriented correctly, but thought I’d check here if there was anything else I should be aware of or keep an eye out for.

#262

Do you have eagle installed? I just fixed some intermittent USB/TRS MIDI action where the value would jump high occasionally, yet the voltage out was as it should be.

There was a cold solder joint on one of the MCP6004s. If you have an issue with the digital outs but not the voltage its very likely either a bad joint on the MCP6004, the 5.6k/10k resistor pair, or the multiplexer input.

If you dont have access to eagle post which number fader it is and i can point you in the direction of which solder joints to look at

Post a board pic

#263

I just assembled a 16n and everything seems to be working perfectly over usb midi, except for fader one that doesn’t give any signal at all. Is there anything I can check before i order, desolder and install a new fader?
I’m a bit new to building things, but all the other faders work perfectly…

#264

Check the voltage out for that jack. If that is ok, then its a cold/missed solder joint near the relevant MCP6004 or the multiplexer input for that fader.

#265

If you haven’t already, check all the pins on the back of the PCB for fader one. I missed one and had a similar problem.

#266

I redid three suspicious looking joints/pins on the multiplexer, and it started working, but after I put the cover on it stopped working again… I do have voltage out of the jack output.
Upon inspection all of joints on the input of the multiplexer looks perfectly fine, but it’s properly where the problem lies.
How do I know which multiplexer pin/input corresponds to what fader?

#267

Made a quick graphic for you from the board files

59%20PM

Another thing to check is the connection on the bottom two pins on each side of the mcp6004 chips. that’s where each connection from the MUX goes for each fader (2 faders per mcp6004 chip)

59%20PM

EDIT - highlighted here is the connection for fader 2. fader 1 is the other side, bottom 2 pins of U2

2 Likes
#268

Edit: @okyeron thanks for the clarification!
Now I kind of solved the problem.
The problem now only arises when I screw in the screw in the lower middle on, on my front plate.
For some reason, maybe a bit of strain on the pcb, i lose connection to the multiplexer, and midi won’t work for fader one. But all the others work fine at all times.
I guess the solution is to not screw in all screws… But if anyone could tell me which pins on the multiplexer goes to which fader I’d love to know.
Thanks for all the help I received already!

#269

I had this happen once - the panel may have a slight bend (?) and it could be flexing the pcb slightly when you tighten up the panel screws.

Option 1 - don’t tighten that screw (probably the one at center bottom)

Option 2 - reflow all the connections around fader 1 so they are more solid.

1 Like
#270

Thanks, yes that might be it. I think I’ll try and make some better connections.
Just have to finally play with it a bit first!
Thanks