Looks OK to me. The Vgs rating of that P-channel mosfet is only 8V, uncomfortablly close to the 6V drive it is getting, so it is probably better to spit the 2K2 resistor into 2 x 1K and drive the gate from the junction of the two. Alternatively, pick a mosfet with a higher Vgs rating but designed for 5V gate drive, such as TSM2313CX.
I have changed from a 6 volt motor supply to a 9 volt supply, (and tapping off 4.5v for the 328 chip), but I don't understand this Vgs thing, so will this schematic still work to turn on/off Vcc to my motor driver chip?
Will I still need to have the 2k2 resister split into 2 1k resistors? I don't understand thus part.
Thanks.
