Hi Paul.

I don't understand why you using PNP transistor ?
Up to me it isn't necessary. (motor return directly
to base of NPN or trough some diode or resistor)

WBR Dmitry.

>   How about:
>
>  +5V o--+-------+---+
>         |       |   |
>         <       <   <
>     22k <   22k <   < 4k7
>         <       <   <
>         |       |   |
>  Pic o--+       |   |
>         |       |   |
>          \|     |   |
>      NPN  |-----+   |
>          v|     |   |
>         /       |   |
>        |        |   |
>        +--------(---+
>        |        |
>        <         \
>    47R <          v|
>        <      PNP  |--+
>        |          /|  |
>        +---------+    |
>  Gnd o-+---/\/\/\-----+---o motor return
>            Rsense