2-layer PCB design with HASL finish, fabricated and assembled by JLCPCB.
Firmware developed in C using Simplicity Studio 5 and compiled with the Keil 8051 C compiler.
PCB designed with KiCAD 7.0.
Custom adapter used during development: https://hackaday.io/project/202798-breakout-board-for-third-party-8051-debugger