Quadruped Robot
Open source, cheap and fun, running robot!
Consists from main, battery protection and servo PCBs
All BOM parts highly cost effective and vastly available from China. Even MCU has minimum 5 for now, pin to pin and firmware compatible alternatives (functional clones).
STM32Cube IDE C, Kotlin, Inkscape SVG
 
2/6/8mm Black and 2mm transparent PMMA sheets laser cut
Laser cut file in original SVG, can be easily exported to any machine friendly format (via Inkscape for example).