Hi everyone, I was hoping I could have some help as I very stuck. So I had my project working on a solderless breadboard, and the circuit was just controlling a mini 12v air pump with an atmega328p.
However I have just soldered everything to a permanent board and now when I plug it nothing works and makes my plug make a hissing noise, and the LED from the plug turns off (when it is normally on all the time it is plugged in).
Below I have attached the schematic for the circuit.
I havent included the code, because it isnt really necessary plus it just turns the pump on and off with intervals if 2 seconds in between.
Any help with this would be really appreciated.
Thanks in advance.