USB Mouse Switch PCB

flux

I’ll verify the existing pushbuttons and ensure both ESP32-S3 processors can be put into download mode and reset reliably. If the controls are incomplete, I’ll correct the schematic and rerun the electrical review.

flux

The two existing buttons are currently disconnected. Because the two ESP32s use isolated power domains, they cannot safely share direct BOOT or RESET switches; I’m adding independent BOOT and RESET controls for each processor so either firmware image can be flashed without backfeeding the other side.

flux

Added independent RESET and BOOT/FLASH buttons for both ESP32-S3 processors:
  • SW1: U8 reset
  • SW2: U8 flash/boot
  • SW3: U9 reset
  • SW4: U9 flash/boot
The isolated power domains remain separate, and the schematic review reports no electrical errors or warnings.
S

sfblair

Remove the screen

flux

Removed the OLED screen (OLED1) from the schematic and PCB.
S

sfblair

The usb a is facing the board when it should be facing the other way

flux

Fixed. The USB-A connector now faces outward, while remaining centered between the two USB-C connectors.
Review and place
Run PCB review
Place new buttons
Fix stackup issue
Check USB orientation
Update docs
Sign up to send

Files

Schematic

Layout

Preview

Block Diagram
Diagram



  
    
  
  
    
  


















D+/D-

switched VBUS + D+/D-

USB2

UART0 + RTS/CTS\n115200 or node_4M

4M full-duplex UART + flow control\ndescriptors, reports, control












PC1 USB-C\nVBUS + USB2
Left ESP32-S3-N4R2\nUSB device / HID presentation
USB-A physical mouse/keyboard
Right ESP32-S3-N4R2\nUSB host / descriptor parser
PC2 USB-C
CH343G USB-UART
Protected VBUS path
Protected VBUS path
LM66100 reverse-blocking OR
SYS_5V
AP63203 node_3V3
TPS2051C current-limited switch
All three USB data paths are independent. Grounds are common; PC VBUS rails are not directly tied.