12v dc

I really need my aquarium controller to have 24V or 12V DC ports that can be turned on for a few seconds o a few minutes at a time at specific points in the day. It's for a frozen food dispenser. @Lasse, I guess you may know this one! Thanks a bunch to anyone who'll chime in!

Todays project is a diy LiFePo4 battery backup. I wanted to make something small that will run my 120v return pump and a wave maker for as long as possible. Never hurts to be prepared right? This will be an Amazon build, I started off with an inexpensive12v 18ah LiFePo4 battery. since I want...