- Improved schema layout for better readability and organization
- Connected CAN transceiver S-pin to GND for proper operation
- Updated PCB layout to reflect schema changes
- Enhanced component placement and routing clarity
Release Features:
- Universal HAT for Raspberry Pi 4/5 and Radxa Rock 5B/5B+
- 8A DC/DC converter with SS56 reverse polarity protection
- Dual toolhead switching via PFETs (PB2/PA5 control)
- Native CAN and USB-CAN bridge support
- USB hub with power delivery for touchscreens
- Comprehensive safety features and thermal management
Hardware:
- STM32G0B1KBU6 MCU with crystal-less design
- MaxLinear XR76208 switching regulator
- MCP2542WFD CAN transceiver with jumper selection
- WCH CH334F USB hub with MTT support
- 2oz copper PCB recommended for thermal performance
Documentation:
- Bilingual documentation (German/English)
- Installation guides with kernel diagnostics
- Klipper configuration examples
- Comprehensive problem statement and solutions
Documentation Improvements:
- Added comprehensive 'Problems Addressed' section explaining the value proposition
- Covers power supply issues, CAN communication problems, safety concerns, and wiring challenges
- Removed JST-XH internal USB port references from pinout sections
- Corrected via placement specification (DC/DC PGND instead of output)
Hardware Updates:
- Updated schema files with latest component changes
- Added custom footprints for XR76203ELTR-F and heat sink components
- Refined manufacturing guidelines for optimal thermal performance
The documentation now clearly articulates the EWS board's role in solving common
Voron 3D printer control system challenges.
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