Power In

wilkinsaf

Hello,

I am looking to create a carrier board for the VOXL2 utilizing the J3 and J5 IO, and had a couple questions.

Power: I can see that there is power input on the J5 connector for 5V in, but I am slightly confused by the pinouts under J5 section. It appears that there is multiple 5V input pins. . I am not an electrical engineer. So, let me know if I need to bring in one on this to understand what these mean.
Mapping pins to paths on linux. I can see that with QUPs we can define what protocol different pins are doing. How do we then map those to a linux path (such as /dev/ttyS0 or something)

Thank you for the help, and please let me know if I need to seek outside resources/counsel to better understand these things. I am trained in software, but trying to better understand this. Thank you!

Vinny

Hi @wilkinsaf
Please refer to this tech docs page and let me know if this helps!
https://docs.modalai.com/expansion-design-guide/
More specifically, these sections:
https://docs.modalai.com/expansion-design-guide/#5v-power-in-vs-5v-power-out
VDCIN_5V has 8 pins in order to meet the 6A current constraint we need.
So, any custom carrier card that intends to provide power TO Voxl2 must have a 6Amp supply and drive those 8 pins together.

For the SW question, I'm not the expert, so hopefully this link helps...
https://docs.modalai.com/voxl2-linux-user-guide/

And, as a teaser... we are in process of building this new board right now... working on the docs at this very moment (so some data is irrelevant as a copy->paste, but it'll be all updated in the next few days): https://docs.modalai.com/voxl2-dev-test-board/
This is the very first public announcement of this new test board. I have hooks in there to test 5V delivery from an external system. SCH will be posted later today

Vinny

Hi @wilkinsaf
Our Schematic for the "B-Quad" (Voxl2 Developer Test Board, M0144) are live!!
https://docs.modalai.com/voxl2-dev-test-board-datasheet/#schematics

In there, you can see an example of how to design the proper connections for powering Voxl2 from J5. VDCIN_5V would be from a 6A capable power supply on your host system (carrier board):