You will find that the General Purpose Relay makes building basic logic circuits feel more approachable and fun.
303-1AH-C-R1 U01 12VDC 2pcs Electric Relay For 2 SPNO 20A 12VDC Song Chuan DS450
The General Purpose Relay keeps things simple for expanding outputs, and you will find that it integrates easily.
A nice touch is the removable relay module in this General Purpose Relay for faster replacement during maintenance.