Circuit problem interfacing with household voltage

I have a little automation circuit attached to my wall on a 110VAC outlook box. The AC wires are close behind by PCB circuit board with three 110VAC switching relays. Periodically when I am turning off the last relay I get a the microcontroller reset. My relays if all activated would pull 200 ma and I do have diodes on them - any ideas on what could be wrong?

thanks

It is hard to say what is wrong.
You said there are diodes. You should have diodes across the coils.
The 10uF cap seems small. Try increasing that to 100uF and see if that helps.
It could be your regulator can not deliver three relays of power. (10uF too small)
200mA for 3 relays or 200mA for each relay???

My guess would be arcing at the relay contacts results in RF interference which is being picked up by the layout traces. Do you have snubbers across the contacts (can't see any in the schematic)?