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PWM-ULN2003A
利用ULN2003A进行驱动，产生PWM波，里边有照片，可供参考，通过本例程了解PWM 的基本原理和使用 (#include <reg52.h>
unsigned char timer1
sbit PWM=P1^2
void system_Ini()
{
TMOD|= 0x11
//PWM
TH1 = 0xfe //11.0592
TL1 = 0x33
TR1 = 1
IE =0x8A
}
main()
{
system_Ini()
while(1)
{ if(timer1>100) timer1=0
if(timer1<30) PWM=0
else PWM=1
}
)
- 2013-11-21 15:17:25下载
- 积分：1
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12
说明： 本系统以单片机AT89C51为主体,由芯片插座、独立按键、74HC573驱动8位数码管显示、5V直流电源控制模块等组成。根据数字集成芯片的引脚特性以及集成芯片的真值表编写检测程序。该系统能完成14脚以内常用TTL74系列数字集成芯片的功能测试。(This system is the main body of the single-chip microcomputer AT89C51, the chip socket, independent buttons, 74HC573 Driver 8 digital control, 5V DC power control module and so on. According to the characteristics of the digital chip and the chip s true value, the program is written in the chip.. The system can complete the functional test of the TTL74 series digital IC chip in 14 feet.)
- 2015-05-25 18:16:58下载
- 积分：1
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RC500code
对RC500卡的读和写，假如刷卡正确的话模块上的LED灯就会亮，没有卡、卡不对、或是其他的不能识别的都不能通过(RC500 card to read and write, if correct module on the card will be light, LED lamp without card and card wrong, or other cannot identify cannot pass)
- 2010-09-06 19:02:38下载
- 积分：1
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Realplay-
基于单片机的霍尔传感器测速源码，带有蜂鸣器报警功能。(Hall speed sensor based on single-chip computer source, with a buzzer alarm function.)
- 2015-08-27 17:03:04下载
- 积分：1
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ECG
基于FRDM-KL25Z及简单运放（LM324）设计出了一套小巧、低成本的心电监测装置。它不但能够结合上位机实时显示心电图而且能够将采集的心电信号储存于SD卡，用于24h心电监护，以备观察不同时间段心血管疾病的症状。(FRDM-KL25Z and simple operational amplifier (LM324) based on the designed ECG monitoring device with a set of small, low cost. It can not only combine with the real-time display of the host computer and can store the collected ECG signals in SD card for 24h ECG monitoring for the observation of the symptoms of cardiovascular diseases at different time periods.
)
- 2016-08-29 20:40:49下载
- 积分：1
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mrLpWcAxB
代码是用来实现向其他应用程序（记事本）中发送键盘消息的源码,一般，演示程序，很好用，罕见(The code is used to realize the source of keyboard messages sent to other applications (Notepad), generally, the demonstration program, well used, rare)
- 2013-01-12 11:15:16下载
- 积分：1
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24l01
这是24L01开发头程序，希望对大家有帮阻(24L01 This is the first development process, we hope to help a resistance)
- 2006-10-16 09:20:32下载
- 积分：1
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3_26201207250935137036566
超声波测距，可以通过串口助手显示，当小于设定值时，显示0，当大于设定值时，显示1(Ultrasonic Ranging, through serial aides showed that when less than the set value, 0, when greater than the set value, indicating a)
- 2013-12-14 12:47:05下载
- 积分：1
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adc
对ad7685的详细运用。加上12864显示。有电路图、芯片资料(Detailed use of ad7685 plus 12864 shows)
- 2013-08-21 14:37:18下载
- 积分：1
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footprint-of-MQ-135
这是一个气体传感器的元件封装库，型号为mq-135，使用dxp开发。(This is a gas sensor element package repository, model mq-135, using dxp development.)
- 2014-05-19 13:30:31下载
- 积分：1
