-
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
-
XListCtrl_demo-20140610
主要是完成Listctr的封装,和对于xlistctrl
的一个实例程序 (The main package is completed Listctr)
- 2014-06-10 21:58:28下载
- 积分:1
-
FAT_Picture_out
具備fat格式 讀取sd card內的圖片顯示在tft螢幕上 (lpc17xx系列)(HAVE FILE SYSTEM AND CAN READ PICTURE IN SD CARD THEN DISPLAY ON TFT(LPC17XX ))
- 2011-06-18 12:56:10下载
- 积分:1
-
111
125k t5557卡 读写(keil C51 T5557 READER)
- 2020-08-29 10:58:14下载
- 积分:1
-
1.2
Indexing addrresses in NASM assembly
- 2014-01-07 04:19:50下载
- 积分:1
-
stm32 跑马灯
说明: 基于stm32固件库的跑马灯范例,供参考(An Example of Racing Horse Lamp Based on STM32 Firmware Library)
- 2020-06-15 22:55:01下载
- 积分:1
-
z
说明: 足球机器人小车总体设计思想及其单片机选型(The soccer robot car overall design thinking its microcontroller selection)
- 2013-03-26 10:18:45下载
- 积分:1
-
bluetooth
IOS端通过蓝牙发送和接收
用的是OC语言,在MACOS上编程(bluetooth sent data and bluetooth received data for IOS)
- 2014-08-07 10:38:28下载
- 积分:1
-
STM32_Modbus-RTU
开关量光耦采集、达林顿管输出、Modbus RTU协议,协议需求文档在另外上传的STM32 Modbus开关量需求文档中。(Switch light coupling and collection, darlington tube output, Modbus RTU protocol, protocol requirements document in another upload STM32 Modbus switch quantity in the requirements document.)
- 2016-11-24 11:06:50下载
- 积分:1
-
xinhao
信号检测 51单片机 通过外部中断检测信号源的脉宽周期频率(51 single-chip signal detection signal detected by an external interrupt source of the pulse cycle frequency)
- 2011-09-15 18:34:50下载
- 积分:1