【摘要】 为有效控制学生因违章操作造成实验电路短路使仪表或设备烧毁现象,设计了一种由17555时基电路构成的闭锁延时电工实验电源,并分析了其工作原理,给出了元件参数选择方法和电路调试方法.该电路具有操作简单、灵敏度高和保护效果好等特点,可推广应用于各类实验中使用.更多还原

【Abstract】 In order to effectively control short circuit and damage to equipment because of the students failing to abide by the operation,a lock delay experiment power source based on 17555 time base circuit was designed.Its working principle was also illustrated,methods for unit parameter choosing and circuit adjustment were given.This circuit possessed simple operation,high sensitivity and effective protection,which are well used in all kinds of experiments.更多还原