This release notes document summarizes new features and updates in Fedora Electronic Lab 12. Key updates include improved collaborative development tools with peer code review, Eclipse as the default IDE with plugins for Verilog/VHDL, documentation generation and version control, and updates to analog design tools Toped, Magic, Electric, and Xcircuit. Ngspice was updated with bug fixes and new models. New packages were added for embedded design tools related to AVR, 8085, 8051 and PIC microcontrollers.