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1:05
douyin.com
74ls48引脚图及功能
计数与显示终于成功了,原来用74ls147根本不能驱动CD4511,因为CD4511输入脚要7.5V以上电压才能驱动,而74 ls147供电只有5V,走了不少弯路!😂😂,后来用4148二极管组成的BCD编码器才能驱动CD4511 ,功夫
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