配置电阻是2个还是3个？

[xianxixi]

根据这张图，配置电阻不应该有3个吗？cfg2,cfg5,cfg6

[j4cbo]

CFG5 (R888) is already set at the factory, so only the resistors for CFG2 (R885) and CFG6 (R889) need to be added:
CFG5（R888）已在工厂设置，因此只需添加 CFG2（R885）和 CFG6（R889）的电阻：

[kqkq]

Don't ever try to replicate this design in China. The inductor and M.2 connectors are insanely expensive. You may want to redesign and use parts easily available in China. 不要尝试在国内复刻这个设计，他选的电感、电源芯片、M.2连接器都贵的离谱。最好是重新设计并选用国内容易买到的零件。

[j4cbo]

Those vertical M.2 connectors are hard to find. If there's a cheaper option, I'd like to hear about it :) The inductor can be substituted too.

[kqkq]

Those vertical M.2 connectors are hard to find. If there's a cheaper option, I'd like to hear about it :) The inductor can be substituted too.

regarding the M.2 connector, could you consider to change to:

Brand: LOTES
Model: APCI0110-P001A
JLC number: C841669

this only cost 1/10 of the current connector.

[j4cbo]

That connector puts the M.2 card parallel to the riser, but it needs to be sticking out at a 90 degree angle :(

[kqkq]

That connector puts the M.2 card parallel to the riser, but it needs to be sticking out at a 90 degree angle :(

APCI0110-P001-A is the correct model, but the LCSC number is incorrect... My bad...

Another alternative is APCI0490:
https://www.lotes.cc/en/product.php?act=view&id=401

I know it needs to be vertical. However, these models are not available on LCSC.

These Taiwan-brand connectors are easily available in mainland China for ~2 RMB (0.29 USD). I don't know if they are also available in the US.

[j4cbo]

Do you know where to find a datasheet for any of these? It looks like many are available from various sellers on Aliexpress, but I can't find a dimensioned drawing anywhere. They might be compatible with the same layout but it'd be good to be able to check...

[kqkq]

Do you know where to find a datasheet for any of these? It looks like many are available from various sellers on Aliexpress, but I can't find a dimensioned drawing anywhere. They might be compatible with the same layout but it'd be good to be able to check...

I don't have the datasheet. I did purchase some to try, but the footprint is not compatible.

[evil2k2]

you can get the footprint from the Tinyriser project
https://github.com/a-little-wifi/Tinyriser