frankzappa

Nah, I think maybe I will try to 3d print a holder to fasten the usb connector so it can't move around.

Just thought it might be possible to run small wires from the vias to your pcb usb connection point(s).

Thanks. Not sure how that would help me, I was trying to break out the USB to a JST connector for robustness. Teensy needs to be in a high vibration environment.

I believe that the USB data lines can be accessed at the vias circled in the picture below. I am not sure which two of the 3 circled are the correct ones. Perhaps Paul can chime in.

Damn! This is exactly what I need as well. need to break out the USB to something that can survive vibration environments. Is it a lockable teensy? BTW I like your machine, I assume it's producing fireballs for super mario :D

Always problems. Why can't stuff be simple? Seems like the only solution is to either use a teensy 4.1 or make a custom teensy on the board. Ideally I'd have a custom teensy 4 on my PCB but that is a huge task

Yes, the Teensy 4.1 changed the pads under the PCB to be the first USB that can be used for programming, and not the second USB which can act as a USB host. On the 4.1, you have to use the 5 pins in the PCB to get to the second USB. I believe...

Can I use this port after programming it to send/recieve data?

I was thinking maybe I needed a 5th pad connected to ground to indicate if it's the USB A or B side.

So you can't program it from the bottom pads? That's unfortunate. Just wasted 250 dollars for not asking here on the forum first. So only option is to use a teensy 4.1 then to breakout the USB?

Here is a pic of the soldering:

I made a PCB a while ago and it's working great but I decided to redesign it and break out the USB from the back of the teensy by using castellated holes via an ESD protection circuit, here is the IC used...