So my component-fu skills have gotten a bit outdated, and I tried to select something like 2N7002 or BSS138 to drive a bunch of relays with 3.3V MCU.
Those would work great with 5V logic levels but I am a bit afraid different manufacturers have a bit different specs and 3.3V might not be enough to turn the FETs fully on.
Any pointers for common low-side FETs that eat 3.3V logic levels and can drive 12V relays (max 100mA)?
Also I will put BAT54 schottky over the coil, it will eat the max 100mA back-emf nicely.
Too bad the 100mA includes multiple coils, so even if I put one diode per coil, one diode will catch all back-emf so the area may be large.