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时下大部分农村的自来水供应是采用定时制,即每天由专人负责定时合闸放水,这很不方便,本文介绍的这种定时器,取材方便,价廉易制。电路如附图所示,整机以计数用集成电路CD4060为核心,图中Cin端的信号取自目前市场上极为常见的液晶式电子表的定闹信号,假如我们要在每天中午12点供水,我们就先把定闹时间定在中午12点,这样,到定闹时间后,闹信号经R1触发晶体管V1导通,在V1导通的瞬间,IC得到工作电源并由C2、R3的作用使输出端复位,V4导通,电源电流经V4、V2、R2注入V1基极,这样就可以在闹时信号消失后,V1仍保持导通,使
Nowadays most of the rural water supply is the use of regular time, that is, every day by someone responsible for closing the water on time, it is not convenient, this article describes the timer, easy access, cheap and easy system. Circuit as shown in the figure, the whole machine to count with integrated circuit CD4060 as the core, the signal in the picture Cin taken from the most common on the market today LCD electronic watch fixed trouble signal, if we want to water every day at 12:00, Let’s set the deadline to 12 o’clock at first. In this way, after the deadline, the alarm signal is triggered by R1 to turn on the transistor V1. At the moment when V1 is turned on, the IC gets the working power and the action of C2 and R3 Output reset, V4 conduction, the power supply current through the V4, V2, R2 into the V1 base, so that you can disappear in the alarm signal, V1 still remain on, so that