Electronic Circuits and Projects Forum

Hi,

The pic below shows a block diagram on my pic controller.

The pic is on a separate board to all the power components, yet over night the Pic is being reset many times by what I conclude is mains interference. ( I have a software Resets counter )

The design ran alongside my old controller, ( no relays connected to loads ) for several weeks without any resets, but once the heater was connected to it the problems started.


Changing the heater and relay made little difference, but last night I fed the whole DC side from a car battery and I only had 2 Resets, so this tends to imply its interference on the power lines.

I am using the filters shown so am a bit lost as to what else I can do to reduce this interference.

Any help appreciated.