I am developing an ATMEGA382 project meant to automate certain aquarium maintenance functions. I need to apply power to 12volt solenoids and pumps. I thought I would use an NPN transistor like a switch with a 3.3v base and 12v collector. I understand this is incorrect. I do not necessarily need high speed switching. What would be a better option? I looked at an IBGF transistor, but that seems to have the same issue I am already facing.
Should I just dump a bunch of 3.3v into both base and collector with a boost converter on the emitter?