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本报时台钟采用MB-TAM415-0液晶电子钟芯和KD482H型汉语报时电路制作,美观大方,经济实用。电子钟芯液晶显示屏面积为40×23mm~2,工作电压1.5V。KD482H系整点语音报时电路,晚11点至早5点设置静音,工作电压3V。工作原理电原理见图1。本电路采用电子钟芯,有无整点信号输出功能。KD482H所需触发信号需从电子钟芯线路板液晶驱动输出线中取出。图2为电子钟芯IC1电路板,从图中第⑦脚和第⒆脚分别取出液晶驱动信号A、B。每当计时电路从:59分变成:00分时,A、B由高低不同的两种电位变成相同的高电位,使BG1、BG2导通,BG3输出一触发脉冲,IC2被触发输出报时语音信
The newspaper clock using MB-TAM415-0 LCD electronic clock core and KD482H Chinese timekeeping circuit production, nice, economical and practical. Electronic clock LCD screen area of 40 × 23mm ~ 2, the working voltage of 1.5V. KD482H Department of the whole point voice time signal circuit, 11 pm to 5 am as early as the mute setting, working voltage 3V. Working principle of electricity shown in Figure 1. The circuit uses electronic bell, whether the whole point of signal output. KD482H required trigger signal from the electronic clock circuit board LCD drive output line taken out. Figure 2 for the electronic clock IC1 circuit board, from the figure ⑦ pin and the first ⒆ pin were taken out of liquid crystal drive signals A, B. Whenever the clock circuit changes from: 59 minutes to: 00 minutes, A and B become the same high potential by the two different potentials, causing BG1 and BG2 to turn on. BG3 outputs a trigger pulse and IC2 is triggered to output the time signal Voice mail