这是一种数字时钟的附加电路,可用来显示星期几并可设置未来一周内任何一天的定时告警,便于你作为重要事件备忘录使用。IC1为4017十进计数器,现将(15)脚与(16)脚相连,使它成为七进制计数器,每天进一位,每位输出均有一只LED指示星期几,然后七天后循环使用。时钟输入由数字时钟经D1、R3引入至(14)脚,数字时钟脉冲周期为24小时,脉冲每逢午夜零点送入(14)脚,送入后显示 This is a digital clock add-on circuit that can be used to display the day of the week and set a fixed time alert on any day of the week, making it easy to use as a memo to important events. IC1 is a 4017 decimator, now connecting (15) to (16), making it a binary counter, entering one digit per day, with one LED for each output indicating the day of the week and then recycling for seven days. Clock input by the digital clock through D1, R3 into the (14) feet, the digital clock cycle is 24 hours, the pulse is sent to every (14) at midnight zero, after the show