Backstory: I have a large table that i discharge multiple batteries on, when they are discharging they emit heat so I am looking for a way to push the hot air out from under the table.
What I am doing: I am looking to turn a cooling fan on that uses a 120v wall socket, but in the interest of saving energy I only want it to turn on whenever a battery is plugged in. The batteries are 12v, so I would like to use a relay that is triggered by that 12v to then turn the fan on. I need help in choosing what relay would be best for this and the circuit design for this. Sorry I am quite new to this so thank you in advance for any help.
What I am doing: I am looking to turn a cooling fan on that uses a 120v wall socket, but in the interest of saving energy I only want it to turn on whenever a battery is plugged in. The batteries are 12v, so I would like to use a relay that is triggered by that 12v to then turn the fan on. I need help in choosing what relay would be best for this and the circuit design for this. Sorry I am quite new to this so thank you in advance for any help.