NE556N:
1. It is a combined package integrated circuit composed of two NE555 timing integrated circuits.
2, its function is equivalent to the function of 2 pieces of NE555 circuit, and the package pin of this circuit has 14.
3, it plays a role in your amplifier, is to eliminate the instantaneous impact of the OCL circuit on the horn when the end of the power amplifier is powered on, and protect the role of the horn.