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蜂鸣器在单片机上的应用,汇编语言,附原理图及说明学习文档 蜂鸣器的正极性的一端联接到5V电源上面，另一端联接到三极管的集电极，三极管的基级由单片机的P2.4管脚...
蜂鸣器在单片机上的应用,汇编语言,附原理图及说明学习文档 蜂鸣器的正极性的一端联接到5V电源上面，另一端联接到三极管的集电极，三极管的基级由单片机的P2.4管脚通过一个与非门来控制， 用户可以通过程序控制P2.4管脚的置低和置高来使蜂鸣器发出声音和关闭。 蜂鸣器的声音大小及音调可以通过调整P2.4管脚的置高时间及输出的波形进行控制，这一点可以在调试程序的时候来试验。-On the buzzer in single-chip applications, assembly language, with a schematic diagram and instructions to study documents the positive polarity of the end of the buzzer connected to the 5V power supply above, the other end connected to the transistor" s collector, the base level by the single-chip transistor Machine P2.4 pin through a NAND gate to control, the user can be programmed to set pin P2.4 low and set high to make the buzzer sound on and off. Buzzer sound size and pitch can be set by adjusting the P2.4 pin of the high time and output waveform control, and this point could be the time to test the debugger.
- 2023-07-19 04:45:03下载
- 积分：1
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最新的计算器1.5
最新的计算器1.5-latest Calculator 1.5
- 2022-03-01 10:32:58下载
- 积分：1
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Hanoi Tower design, we hope to useful, please exhibitions.
汉诺塔设计，希望对大家有用，请大家多多指教。-Hanoi Tower design, we hope to useful, please exhibitions.
- 2022-01-26 01:27:29下载
- 积分：1
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First, the use of a keyboard display interface chip receive keys keys 8279, and...
一、 使用键盘显示接口芯片8279接收按键键值，并在七段数码管上显示出来，通过判断键值进入相应音乐播放处理程序。在音乐播放程序中，使用定时器/计数器8253的计数器2，使其工作在方式¬ ¬ 3―方波发生器，通过查表依次取出乐曲频率值送入计数器作为计数初值，经out2输出方波，驱动扬声器发出不同频率的声音，在每个音阶之间加入相应的延迟时间，即实现了音乐的播放。-First, the use of a keyboard display interface chip receive keys keys 8279, and Seven-Segment LED display, through to determine the corresponding music player keys to enter the treatment program. Procedures in the music player, use the timer/counter 2 counter 8253 to work in the way ? ? 3- square-wave generator, followed by out music through the look-up table values into the counter as a frequency count of the initial value, the output side out2 waves, driven loudspeakers of different frequency sound, in between each scale by adding the appropriate delay time, namely, the realization of the music player.
- 2023-03-17 05:55:03下载
- 积分：1
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调用库文件设计的流水灯，简单易懂而且实用！
调用库文件设计的流水灯，简单易懂而且实用！-Call the library file designed water lights, easy-to-read and practical!
- 2022-03-05 21:32:50下载
- 积分：1
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5767例子程序，用C编程，很经典，大家直接复制来用
5767例子程序，用C编程，很经典，大家直接复制来用-5767 examples of the procedure, using C programming, it is a classic, we directly copy to use
- 2023-08-07 01:55:03下载
- 积分：1
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AT89C2051制作红外线多路遥控器，多通道，操作简单
AT89C2051制作红外线多路遥控器，多通道，操作简单-AT89C2051 produced more Luyao infrared controller, multi-channel, simple operation
- 2022-03-16 04:05:48下载
- 积分：1
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北京邮电大学 全套汇编与接口课件（ppt版，共十章） 很完整也很实用，希望对大家有帮助...
北京邮电大学 全套汇编与接口课件（ppt版，共十章） 很完整也很实用，希望对大家有帮助 -Complete compilation of Beijing University of Posts and interface Courseware (ppt version, a total of 10 chapters) is very complete and very useful, want to help everyone
- 2022-08-07 09:31:15下载
- 积分：1
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AT89C2051时钟程序
AT89C2051时钟程序 -AT89C2051 clock procedures
- 2023-04-03 13:45:03下载
- 积分：1
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用汇编写的win32程序一些例子。
用汇编写的win32程序一些例子。- With collects the compilation win32 procedure some examples.
- 2022-03-10 22:49:21下载
- 积分：1
