u/benbencai_

Hi,

This is my first PCB, so I’m open to any criticism and would really appreciate any advice or feedback!

My goal here is to keep things simple and make a wired mouse using the STM32F411CEU6 (weact blackpill) and a pixart paw sensor.

I looked through the datasheets of both the mcu and the sensor and weact studio blackpill schematic as well as asked ai for explanations.

Some of the significant components:

Sensor - PAW3395DM-T6QU
MCU - STM32 F411CEU6
LDO (1V8) - XC6206-1.8
LDO (3V3) - AP2112K-3.3
Crystal (25MHz)- 7E25000E20UCG
USBC - HRO TYPE-C-31-M-14

Screenshots of the schematic and PCB should be attached (Not sure if I’ve followed the steps properly in screenshotting but i tried to make it clear as possible and copy the format of other’s screenshots)

I ran the drc which came back with errors on the sensor pins being too close to the edge, however the footprint came like that so I assume that part is fine?, however there were also warnings with the silkscreen on the usb (clipping board edges, clearance and solder mask) (downloaded the footprint from ultralibrarian, not sure if these errors are expected or if I should edit the foot print)

Thank you in advance for taking the time to give advice or feedback. I really appreciate it!