Hi Kai,

Thank you very much for your suggestions I have implemnted the suggestion Kindly check the layout and let me know If any further corrections are needed.

1. I have changed the SSR signal tracks as per your suggestions. Now it is pretty much isolated from the AC terminals.

2. I have tried to put a ground guard onto the top around the microcontroller circuitary. I have used vias to connected the top and bottom ground planes. I am using a pitch of 300 mill ie. 7.6mm for these vias. Is it fair to use this pitch or standard pitch is somewhat else.

3. The crystal case - I remember I grounded it earlier and then I ripped ground latter and then I forgot about it. It has been grounded with a trace on top side.

4. R8 R29 distance has been increase to approx. 8mm.

Thank you once again for your classy [ Klass(y) ] Sugegstions.

Thanks & Regards,
Prahlad Puroit