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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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FM
说明： 我画的收音机PCB板，使用GS1299的收音芯片(I painted the radio PCB board)
- 2012-01-01 17:26:27下载
- 积分：1
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ocm160128
单片机与160128液晶屏的接口程序，液晶驱动芯片T6939C。适合初学者开发使用(SCM and 160,128 LCD interface program, LCD Driver IC T6939C. Development of use for beginners)
- 2020-11-08 09:49:47下载
- 积分：1
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WeatherStation
蓝牙4.0 天气温度湿度监测传感器, 使用用IT CC2540 或CIT CC2541 芯片实现.(Bluetooth V4.0 weather sensor and use IT CC2540/41 CPU to monitor remote temperature.)
- 2015-07-06 01:37:19下载
- 积分：1
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LEDMatrix
89S52 单片机 + 74HC595 + 组成的8X8 LED 点阵驱动显示程序，Keil C环境编写，带显示字符压缩／解压源／显示／代码。(89S52 composed of lattice-driven 8X8 LED display program, Keil C environment preparation, showed a band of characters compression/decompression source/Display/code.)
- 2006-10-11 17:50:33下载
- 积分：1
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platsmp-brcmstb
Broadcom STB CPU SMP and hotplug support for ARM.
- 2015-06-25 11:20:37下载
- 积分：1
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zhinengchechengxu
四驱智能车控制程序，包括小车前行后退左转右转红外遥控超声波避障循迹蓝牙控制程序(Intelligent four-wheel drive vehicle control program, including the former trolley line back Zuozhuanyouzhuan infrared remote ultrasonic obstacle avoidance tracking Bluetooth control program)
- 2016-05-23 12:03:04下载
- 积分：1
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ENCODER_EC11
基于STC15单片机的EC11旋转编码器驱动程序。支持一定位对一脉冲或两定位对一脉冲的两种规格EC11。并实现旋转编码器按键单击双击长按功能(EC11 rotary encoder driver based on STC15,Two kinds of specifications for one pulse or two positioning to one pulse for certain bits EC11. And realize the rotary encoder click, double-click, long press function)
- 2017-11-17 13:31:48下载
- 积分：1
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chacha
单片机完成两个功能：电机测速与频率测量，电机测速部分：单片机输出脉宽可调的方波控制电机速度，同时数码管显示电机的速度值。频率计部分：单片机完成对外部信号频率的测量，测量范围从2hz到10mhz，并通过数码管显示频率值。(MCU to complete two functions: motor speed and frequency measurement, the motor speed parts: the microcontroller output square wave pulse width adjustable motor speed control, digital display while the motor speed value. Frequency counter parts: MCU to complete the external signal frequency measurement, measuring range from 2hz to 10mhz, and through the digital display frequency.)
- 2010-11-12 20:52:37下载
- 积分：1
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MSP430-MODBUSRTU
个人写的基于MSP430F149的modbusRTU协议的实现，代码完全可用，压缩包内有编译无错误和运行测试例子的截图证明，使用时直接将.h和.c文件加入工程，修改相应的IO和串口即可，芯片使用MAX3485(Achieve personal written agreement based on MSP430F149 modbusRTU code fully available, compression packages have screenshots compile error and run test cases proved directly. H and. C file on the use of the project, modify the IO and serial namely may, chips MAX3485)
- 2014-03-07 16:02:46下载
- 积分：1
