I just used something like this:

AlloverPower 3V - 24V 1.5A 36W Adjustable DC Power Supply Kit Adapter Speed Control Volt Display/ON Off Switch with Variable 8 Plugs https://www.amazon.com/dp/B07WP2LBXW/ref=cm_sw_r_cp_api_glt_fabc_4AEMGD1QZ1H9QB405XZJ