- Added 10µF capacitor C304 for improved CAN communication stability
- Enhanced signal integrity with additional filtering at CAN transceiver
- Updated changelogs and documentation for Rev. 0.3
Hardware Improvements (Thanks to shx for schematic cleanup):
- Clean up schematic organization and structure
- Set CAN transceiver Silent pin to GND for stability
- Add status LEDs (yellow: 24V/5V/3.3V, green: MCU PB4)
- Replace jumpers with solder jumpers on bottom side
- Add jumpers to output PFETs for permanent-on without firmware
- Add robust test points for 5V/GND load testing
- Add optional heatsink for DC/DC converter on bottom
- Add 10µF capacitor for MCU on 3.3V rail
Component Optimizations:
- Replace 30kΩ with 33kΩ basic part for simplified BOM
- Change DC/DC feedback: 15.5kΩ15kΩ (new output: 5.1V)
- Upgrade CAN ESD protection: NUP2105LPESD1CAN
- Increase CAN termination resistor footprint: 04020603
- Switch USB hub supply from 5V to 3.3V per datasheet
Production Ready:
- Add all LCSC part numbers and rotations
- Generate complete production data package
- Improve PCB layout and button placement
- Create comprehensive changelog documentation
Hardware Changes:
- Replaced reverse polarity protection with 2x PFET toolhead switching (PB2/PA5 control)
- Added SS56 Schottky diode reverse polarity protection for DC/DC converter
- Updated current limit resistor to 5.1kΩ (~10.2A)
- Removed fan control circuitry and JST-XH connector
- Removed internal JST-XH USB port with fuse/protection
Documentation Updates:
- Updated both README files to reflect hardware changes
- Removed all fan control references and configurations
- Updated Klipper configuration examples
- Cleaned up pinout and connector assignments
- Updated technical specifications table
- Fixed table of contents and cross-references
Eduard Iten