I'm designing a PCB that receives 3 power inputs 3.3v, 5v and 12v.
I need simple way to switch all of them of in one go.
My 12V line is for running a ws2815 led strip and may go up to 10A.
The 5V line is just for the level shifter.
The 3.3V is for running a NodeMCU ESP-12E board.
I'm using EVGA SuperNOVA 650 G1+ to drive everything .
I can switch the outside power source but it should run a couple of this boards and I want to be able to Independently shut them off.
I need to run a lot of those and I'm already running 7A on the 12v line so I can't just keep drawing power form only the 12v line there is the matter of the cable and how much amp it can run.
I can use what ever components I want I just need to keep it small.
Using help form an answer on a previous post of mine see here I came up with this switching solution:
Is this a correct use of BJT?
Do I need to add fly-back diode or a resistor somewhere?
This is just a test circuit to see if it even works everything at default and the diode is there just a place holder.