12v power supply

Hey guys, my arduino and led strips are sharing a 12v ac/dc power supply. I read that it should be fine, but I want to leave it plugged in and not worry about it. I measured the voltage from the supply as 12.4 v exactly. Will I run into any issues if I leave it on for a while? Thanks.

What is "My Arduino"?
A Nano is less forgiving than an Uno.
Leo..

Are you powering the LED strips from the Arduino 5V? Uno can supply more current, up to 800ma - from a 7.5V source, maybe. From a 12V source, it will overheat and shut down.

Nano is only good for 150mA, so it will overheat and shut down even sooner.

If the LEDs do need a 5V source, use a switching regulator to bring 12.xV down to 5V, and power everything in parallel from that.

Ahhh, you saw a 5volt addressable LED strip.
My crystal ball didn't see that.
Leo..

Had to ask. Could be a 12V addressable strip too (I don't know how works out).

Could be 'dumb' 12V strips too, so transistor buffer would be needed.