Need a protection circuit?
i am making my own speaker system. i am using this amp http://www.dealextreme.com/p/y148-audio-amplifier-module-93121
the issue im facing is that a few days ago i power this amp with a smps 12v 1amp supply and it was working fine till something went wrong with the psu and there was a spark in the psu, the major problem which occurred was that this caused a surge which travelled through the amp to my audio source which in this case was my computer. i ended up frying my sound card .
can anyone help me make some kind of protection circuit which allows audio signals to pass through but does not let current from the psu pass through.