search

modzvilleusa / Modxo-PCB-for-Rp2040-tiny

Modxo PCB for Rp2040 tiny
GNU General Public License v3.0
63 stars 3 forks source link

Diode direction #1

Open Scyllinice opened 3 months ago

Scyllinice commented 3 months ago

Hello,

I am not familiar with the silkscreen marking for the diode. Which way should it be placed?

Thanks!

Scyllinice commented 3 months ago

Apologies @modzvilleusa, but I suspect Github didn't notify you that an issue was opened. If it did, again, sorry for the badgering!

Scyllinice commented 3 months ago

I went ahead and built it up and took an educated guess.

The line of the diode goes toward the RP2040.

Thanks for the board. It works great! :)

modzvilleusa commented 2 months ago

Ey sorry for the delay, glad you got it sorted. I'll have the silkscreen be more intuitive on future revisions.

jrmcauliffe commented 2 months ago

Checked here for the same info. To be more specific

The anode (flat side of triangle) - Connected to LPC header, further away from RP Board on PCB. The cathode (pointy side of triangle + bar) - Connected to 5V RP2040 pin, closer to RP Board on PCB.

I'm guessing this is replacing D2 on the RP2040-YD board(?)

Scyllinice commented 2 months ago

The diode is needed if you connect the Pico to USB while it's plugged into the LPC header. It's so you don't back power the Xbox from the Pico.

It's a recommended step if you're powering the Pico from the 5V pin

Scyllinice commented 2 months ago

The good news is that while there has been a revision to Modxo that technically obsoletes this board, getting it up to date looks to be just a couple of wires on pin 8 and 9 (the bottom right 2) to the respective pins on the LPC header. Should be totally doable for just about anyone.