看了贵刊96年第3、10期上发表的有关水箱水位控制电路后,觉得不是太复杂,就是工作稳定可靠性差。本人经业余实验,得到两方面都比较满意的控制电路,现介绍给大家。实验控制电路如图所示。电路工作原理简单介绍如下。开始工作前,因水箱中无水,晶体管Q1基极与+6V电源之间处于开路状态,因此,Q1管无基极偏流,也无集电极电流,所以,控制电路处于不工作状态。当合上闸刀K之后,经继电器J常闭接点J-1接通马达电 After reading the water tank level control circuit published on the 3rd and 10th issues of 1996 in your magazine, I feel that it is not too complicated, that is, the work is stable and the reliability is poor. I am amateur experiment, get two aspects are more satisfied with the control circuit, are introduced to you. Experimental control circuit as shown. The circuit works briefly as follows. Before starting work, because the water tank is dry, the base of transistor Q1 is open with + 6V power supply. Therefore, Q1 has no base bias current and no collector current, so the control circuit is not working. When closing the knife K, through the relay J normally closed contact J-1 connected to the motor