2 layers120 × 120 mm

RJ21 RJ45 PRIMARY BREAKOUT
marrold/RJ21_RJ45_PRIMARY_BREAKOUT
A breakout board that converts RJ21 into 12x RJ45 connectors with 1 line each, and 3x RJ45 connectors with 4 lines each
20 parts4
Open-source boards designed in KiCad by marrold on GitHub, from 2 repositories. A board’s address here is its repository’s there.

marrold/RJ21_RJ45_PRIMARY_BREAKOUT
A breakout board that converts RJ21 into 12x RJ45 connectors with 1 line each, and 3x RJ45 connectors with 4 lines each

marrold/BBCWinchesterPro
A combined Winchester and 2nd Processor for the BBC Micro