搜索优化
English
全部
Copilot
图片
视频
地图
资讯
购物
更多
航班
旅游
酒店
搜索
笔记本
Top stories
Sports
U.S.
Local
World
Science
Technology
Entertainment
Business
More
Politics
过去 30 天
时间不限
过去 1 小时
过去 24 小时
过去 7 天
按相关度排序
按时间排序
eeworld.com.cn
25 天
历史上的今天
本文介绍了一种基于AT89C51单片机和555定时器的数显式电阻和电容测量系统设计方案,然后制作出电路实物,实现系统的功能。系统利用555定时器和待测电阻(或电容)组成多谐振荡器,通过单片机定时器测量555输出信号的周期,根据周期和待测电阻(或电容 ...
一些您可能无法访问的结果已被隐去。
显示无法访问的结果
今日热点
Places global staff on leave
Suspends parcels from China
Wins Senate committee vote
Senate confirms Bondi as AG
Plans to take over Gaza
RFK Jr. clears Senate panel
Arrested on multiple charges
Offers to jail US criminals
Sued by former nanny
EPA warns employees
Neo-Nazi leader convicted
Announces death of mother
Sweden school shooting
To cut up to 7,000 jobs
Sued for discrimination
Mimics moon’s gravity
FSU coach stepping down
Adds surcharge to eggs
Inks deal with SK’s Kakao
Suspended 10 games
Key Bridge design unveiled
To launch streaming service
DOJ to battle antisemitism
US job openings fall
Baby elephant at OR Zoo
US begins migrant flights
Atmospheric river slams CA
Spiritual leader dies
Confirmed as VA secretary
反馈