- should have a couple of bypass caps between power and gnd.
- A pull-up resistor on RESET would be a good idea.
- wiring near "digital switch" looks odd, but I'm not exactly sure what that
is, so I don't know if it's actually incorrect. The transistor should probably
have a base resistor, and if the box is relay coil, the transistor would usually
be between one side of the coil and gnd, instead of "across" the coil.