Ah, got it.
On 1518871485, Ranger Home said...
Granted, my set up is wired to a 12v battery with a solar panel, but same exact thing as hard wiring to a 12v transformer. I'll get you a pic if you want of how to wire it.
Be sure the 12v supply is regulated. A 12v unregulated supply puts out about 16v, wbich might be too much. If you have to use an unregulated supply, get a 9v supply.