Eduard Iten
401d8f5c1b
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
2.0 KiB
2.0 KiB
Changelog
All notable changes to this project will be documented in this file.
The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.
[Rev. 0.2] - 2025-12-08
Improvements
- Schematic: Cleaned up and structured (Thanks to "shx")
- CAN Transceiver: Silent pin connected to GND for better stability (Thanks to "shx")
Added
- Status LEDs:
- Yellow LEDs for 24V, 5V and 3.3V voltage indication
- Green LED on microcontroller (Pin PB4)
- Solder Jumpers: Replaced standard jumpers with solder jumpers on bottom side
- PFET Control: Added jumpers for output PFETs - enables permanent-on without firmware
- Test Points: Added robust test points for 5V and GND for load testing
- Heatsink: Optional heatsink for DC/DC converter on bottom side
- MCU Capacitor: 10µF capacitor for microcontroller on 3.3V rail
Changed
- Production: Added all LCSC part numbers, defined rotations, created production data
- PCB Layout:
- Adjusted according to schematic changes
- Improved button positioning
- BOM Optimized:
- Replaced 30kΩ with basic part 33kΩ
- Changed 15.5kΩ DC/DC feedback to 15kΩ → new output voltage: 5.1V
- CAN ESD Protection: Replaced NUP2105L with PESD1CAN (better suited)
- CAN Termination Resistor: Changed footprint from 0402 to 0603 for adequate power rating
- USB Hub: Changed supply from 5V to 3.3V (per datasheet recommendation)
Technical Details
- DC/DC Output: New voltage 5.1V instead of 5.25V due to feedback resistor change
- Improved Heat Dissipation: Optional heatsink on bottom side
- Stable CAN Communication: Through ESD protection upgrade and resistor optimization
Note: The original documentation is in German (CHANGELOG.de.md). This English version is a translation for international users.