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xianlutongduanqi
线路通断检测器的设计:
1.用压电陶瓷蜂鸣片作为电声元件。
2.用两根导线作为测试探针
3.线路通断是通过测试电阻的大小来判断,有以下三种情况:
(1)若150Ω<Rx<900Ω,则蜂鸣片不发出声响。
(2)若Rx>900Ω或者Rx<150Ω,则蜂鸣片发出间歇式的滴-滴声响。
以上各临界阻值(150Ω和900Ω),允许误差±10%
4.+15V直流稳压电源需要设计。
(Line-off detector design:
1. Piezoelectric ceramic buzzer as the electro-acoustic components.
2. As a test probe with two wires
3. Lines off by testing the resistance to determine the size, the following three conditions:
(1) If 150Ω <Rx <900Ω, the buzzer is not audible.
(2) If Rx> 900Ω or Rx <150Ω, then the buzzer sent intermittent drip- drip sound.
Above the critical resistance (150Ω and 900Ω), tolerance ± 10
4.+15 V DC power supply need to design.
)
- 2011-06-19 21:49:39下载
- 积分:1
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Fingerprint_Recognition_Systemm
its all about the finger print recognition
- 2010-02-09 04:04:31下载
- 积分:1
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AD7705SENSORv1.01
P89LPC931操作AD7705的程序。 (P89LPC931 AD7705 operational procedures.)
- 2007-03-20 09:43:23下载
- 积分:1
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nsl-kdd-cup
nsl- kdd cup Dataset- Test & Train
- 2020-06-26 18:00:02下载
- 积分:1
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ABAQUS_Fric_Subroutine.pdf
User subroutine to describe friction in contact simulations
- 2010-05-19 17:24:33下载
- 积分:1
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[p003]STM32F103单片机逆变器原理图和源码
STM32F103单片机逆变器源码,大家知道, 市电或其他的交流电可以通过二极管或可控硅的单向导电性整流成直流电供
给需要使用直流电的场合。这种把交流电变换成直流电的过程我们叫做整流,也叫做顺变。
那么逆变呢?我们自然地就会想到,应该就是把直流电变换成交流电的过程。逆变电源就是
相对于整流器而言通过半导体功率开关器件的开通和关断把直流电变换成交流电的这么一
个装置。 逆变电源也叫做逆变器.(STM32F103 microcontroller inverter source, we all know, city power or other AC can be diode or SCR one-way conductivity rectifier into DC power supply
For occasions requiring direct current. This process of converting alternating current into direct current is called rectification, which is also called commutation.
What about inverting? We naturally think of the process of converting direct current into alternating current. Inverter power is
As opposed to a rectifier, the direct current is converted into alternating current through the turn-on and turn off of the semiconductor power switching device
Unit. An inverter is also called an inverter)
- 2020-11-27 20:39:30下载
- 积分:1
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SIM800C GPS通讯
使用STM32+SIM800C,拨打电话、发送短信、透传和手机蓝牙控制等(Using STM32 + SIM800C, dialing, sending short messages, transmission and Bluetooth control of mobile phones, etc)
- 2020-06-18 19:40:01下载
- 积分:1
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code
基于51单片机的信号发生器 四种波形显示 有级调频(Based on 51 single-chip signal generator)
- 2013-09-02 09:33:34下载
- 积分:1
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onenet BC95 COAP
中移动BC95开发程序包,STM32L10x+BC95+ADLX345(China Mobile BC95 Development Package)
- 2019-01-18 14:12:19下载
- 积分:1
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EM4095
采用STC89C51编写的125K射频卡阅读器程序,采用EM4096基站芯片。(125K RF using STC89C51 written card reader program, the the EM4096 base station chip.)
- 2012-07-12 10:05:19下载
- 积分:1