Hello sir,
I was working on relays which was driving bulb using 230V ac...bt sumthng wnt wrong wid d connections which made a big spark...n after dat wen u tested my relays...dey r working f9 bt my laptop cannot detect my arduino board.i tried wid many other laptops bt it is nt recognizing my arduino comm port...plz plz sum1 help me wat to do...n wat exactly happened to my arduino...plz tell me wat cn i do to get my arduino working