搜索优化
Rewards
English
搜索
Copilot
图片
视频
地图
资讯
购物
更多
航班
旅游
酒店
房地产
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
6 天
基于单片机的光电密码锁的原理(硬件电路及源程序)
密码是4321时,执行相应的密码正确动作,否则不执行。 (1)反射式光电对管前无障碍物,所以接收管不导通,其输出为高电平,经74LS04反向器后输出为低电平,LED1发光;当在对管前挡障碍物时,接收管导通,输出为高电平,LED1不发光。该输出端接单片机的T0脚。
eeworld.com.cn
7 天
MAXREFDES1153:采用MAX17205,具备电池保护和平衡电路的多节电池电量计
The MAXREFDES1153 is a monitoring solution for genuine lithium-ion (Li+) battery packs with 2 to 15 cells connected in series. This reference design provides an accurate state of charge (SOC) in ...
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
Shooting suspect left note
1951 kidnap victim found
Daylight saving time
California plastic bag ban
Astronauts return to Earth
Makes emergency landing
Robinson loses key staff
Bulls escape MA rodeo
Co-founder testifies
Visits US ammunition plant
Dolphins legend Morris dies
Tech ban proposed
SpaceX plans Mars missions
To meet Vietnamese pres
No govt. shutdown for now
San Francisco homelessness
Ga. suspect's mom indicted
No. 1 at box office again
Economic speech this week
More troops to Middle East
Former WA governor dies
Iran coal mine blast
Donlon's homes searched
CA firefighter held for arson
ISR raids Al Jazeera office
Free COVID-19 tests
反馈