I have a data logging application running powered from a mains power supply. The grid has dipped a lot recently and on most occasions the Arduino has not reset properly and thus not run the sketch. A manual reset works fine. Has anyone else had this problem or do I just have a poor quality mains power supply? Going for a battery backup and switchover seems over the top; would I get any improvement by increasing the capacitance on the 5 V regulator circuit?
Thanks for any hints.