First time here. I'm building a mini "console" similar in shape of an old recording studio console for my grandson at my daughter's request. He is a toddler and the console involves lights, switches, sound effects, etc. She would like it to be battery powered, and I suggested allowing for an internal DC supply (9 VDC) that can be powered from a 120AC wall outlet as well.
I want to make it user friendly so I came up with a simple idea I've never done before but should work in theory. I want to get other opinions in case I'm overlooking something as I've never worked with electro mechanical relays. So here is my idea.
There will be a master power switch and an internal battery power supply consisting of 6 each D cell batteries. I will also have a 9VDC AC line powered supply. My idea was to use a relay that will switch the power supply feed via a relay that is activated as soon as the AC power cord is plugged into the wall. The 120AC will activate the low voltage power supply, and in turn activate the relay in the "on" position to switch the source of power from on board batteries to the rectified AC supply.
Will the relay, if I stay in specs of the relay, be able to stay in the on position for an extended time without overheating and/or failing?
I want to make it user friendly so I came up with a simple idea I've never done before but should work in theory. I want to get other opinions in case I'm overlooking something as I've never worked with electro mechanical relays. So here is my idea.
There will be a master power switch and an internal battery power supply consisting of 6 each D cell batteries. I will also have a 9VDC AC line powered supply. My idea was to use a relay that will switch the power supply feed via a relay that is activated as soon as the AC power cord is plugged into the wall. The 120AC will activate the low voltage power supply, and in turn activate the relay in the "on" position to switch the source of power from on board batteries to the rectified AC supply.
Will the relay, if I stay in specs of the relay, be able to stay in the on position for an extended time without overheating and/or failing?
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