基于单片机的大功率数码管倒计时系统
Design of Countdown System Based oil SCM arid Showed by High-power Digital Tube
摘要
设计了以STC89C52单片机为控制核心,采用译码器CD4511作为锁存器,通过达林顿管MC1413驱动共阳极大功率数码管显示的倒计时电路。电路采用开关型降压稳压器LM2576-ADJ给数码管供电,用三端稳压器LM7805给单片机及CD4511供电,可对999天内的时间进行倒计时,精确到秒。实验结果验证了设计方法的正确性和可行性。
Abstract
Using decoder CD4511 as latch and Darlington tube MC1413 as drive at high-power digital tube, it is designed to countdown by Single Chip Micyoco （SCM） STC89C52. The network, suppiying digital tube by switching buck regulator LM2576-ADJ and SCM CD4511 by t
关键词
单片机STC89C52/倒计时/大功率数码管Key words
SCM STC89C52/Countdown/High-power/digital tube引用本文复制引用
出版年
2011
NETL
NSTL
万方数据