INTERACTIVE MODULE 8x8 is designed on printed circuit board. By doing this way, we can combine some INTERACTIVE MODULE 8x8 together to get a big interactive led table. We can also save a lot of time and the circuit works more stable, minimizing noises compared to soldering copper wires to each component.
Youtube link: https://www.youtube.com/watch?v=r1UEOH6pSV8&list=PLfrr5s2He43DA6daAvAkNx7effH3VRyMU&index=3
Instructable link: https://www.instructables.com/id/PCB-FOR-INTERACTIVE-MODULE-8x8/