FREMGANGSMAADE OG ANLAEG TIL STYRING AF EN HARDDISK SAMT ANVENDELSE HERAF

摘要

A method and a system for controlling the hard disk in a PC comprises a program stored in the PC and a program- controlled circuit (Fig. 1) for controlling a relay RE for power to the hard disk motor M. The program-controlled circuit comprises two input counting circuits U1, U2, a logic circuit U3, U4 and a bistable circuit U5 which controls the relay RE via a transistor T1. <IMAGE>