It's possible to build dance pads too, but as this board lacks multiplexing ... only designed for 10-20 LEDs total, with a maximum of ~0.7A draw This can be bypassed/remedied by using the expansion IO ...
The ESP32 OpenLCB IO Board can be powered from an external power supply (12V) on J5 connector, or using the OpenLCB (LCC) Bus power on RJ45. To enable powering from the external supply, bridge pins 1 ...