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数字仪表几乎都需要一个标准的门控时基信号.笔者利用普通廉价电子表芯的秒脉冲作为1秒门控时基信号.这样不但成本低廉,电路简单易行,而且精度相当高,完全能适用于生产和修理用测量仪表以及袖珍式数字仪表中. (一)工作原理数字电子表液晶显示屏是采用32赫交流方波电压驱动的.屏上各段笔划的显或灭,并不是用电位的高或低来控制,而是看笔划电极与公共电极上的方波电压是同相或反相来决定的.如果笔划电极与公共电
Almost all digital instruments need a standard gated time-base signal. I use ordinary cheap electronic watch second pulse as a one-second gated time base signal. This not only low cost, the circuit is simple, and the accuracy is quite high, completely For production and repair of measuring instruments and pocket-sized digital instruments (A) Working principle Digital electronic watch LCD screen is the use of 32 Hz alternating current square wave voltage driven screen each stroke on or off, not with The potential of high or low to control, but to see the stroke electrode and the common electrode on the square wave voltage is in phase or inverse to determine if the stroke of the electrode and the public