Yas i have 14 relay but only 4 are on pcb other relays are on header pin external relay module header have 5v gnd amd arduino pin
And also 4 on pcb relay have backup headr in case of failure of pcb some how right now i'm using external relay module due to interal issue because i forget to put optocoupler/reverse emf diode 2 resistor and one transistor
That's why i use external relay module it have all if requirements
Also in power supply i connect from externally using jumper wires because it't have 0.2A output hi-link 2w 0.2amp 9v using 1amp 5v regulator ic