Calculating base resistor on mosfet AO3400A

[Demon]

Richard brings up an important point about the PIC's drive current capacity. I'll use 10mA in my calculations.

R = V / I
= 5 / 0.010
= 500

P = V * I
= 5 * 0.010
= 0.050 W (just to confirm resistor package at JLCPCB)

Qg = 6 nC
Ig = 10 mA
t = 0.000 000 006 / 0.010
= 0.000 000 6

0.6 uSec is not a problem for my application. I just want to activate a solenoid long enough to properly activate a limit switch, then let if fall back using the built-in return spring.

The specs for Qg on the AO3400A use:
- Vgs = 4.5V
- Vds = 15V
- Id = 5.7A

I'm nowhere near that with only Vds 8.5V at 1A max.