数字音量控制电路原理图

　　材料BOM表：
　　J1 = RCA Audio Input Socket
　　J2 = RCA Audio Input Socket
　　C1 = 0.1uF-16V Ceramic Disc Capacitor
　　C2 = 0.1uF-16V Ceramic Disc Capacitor
　　C3 = 0.1uF-16V Ceramic Disc Capacitor
　　IC1 = DS1669 (is available from Dallas SCo.
　　SW1 = Momentary Push ButtON Switch
　　SW1 = Momentary Push Button Switch