I need the best surge & noise filter schematic

[Sheeraz Khan]

noise filtering schematic

Dear All

I need the best surge & noise filter schematic
I wont to use this schematic with my computerize attendance control terminal because I am facing the problem in terminal mostly the data is lost due to surge
So please provide me the best surge & noise filter circuits


Best regards
Sheeraz Khan

 

[som_raparty]

noise filter schematic

you did not mention in clear abt the voltage levels you are operating
but the best solution available for surge is using MOV's and you can even use Gas Discharge Tubes, some cases your differential mode filters also helps in surge suppression

bye
som