现在无函数运算功能计算器的价格一般比较低,这些廉价的计算器可改装为计数器使用(如绕线机计数器等)。改装的方法是,打开计算器,从线路板上对应于等号键的两电极上引出两根线,然后把计算器装好,在需要记数的设备上装一个自动开、合开关,每需要记一个数时,使开关 Now that there are no function calculators, the price of calculators is generally lower. These cheaper calculators can be retrofitted into counters (such as winding machine counters). Modified method is to open the calculator, from the circuit board on the two electrodes corresponding to the equal sign key leads to two lines, and then the calculator installed, the need to record a device equipped with an automatic on and off switch, each required Make a switch while remembering a few