How to command a 220v device through a 12v output
Relays are commonly used for this type of application. These are available for panel mount or as PCB modules for incorporation into a project case or machine cabinet.



Figure 1. Industrial relay and panel or DIN mount base.



Figure 2. PCB relay on board.







simulate this circuit &ndash; Schematic created using CircuitLab

Figure 3. The schematic symbol is(?) self explanatory. The coil pulls the contact closed when energised.


Pick the relay mechanical packaging to suit your application.
Choose one with a 12 V DC coil.
Choose one with contact current ratings greater or equal to your load current.