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在电子技术中,频率是最基本的参数之一,又与许多电参量的测量方案、测量结果都有十分密切的关系,因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测...
在电子技术中,频率是最基本的参数之一,又与许多电参量的测量方案、测量结果都有十分密切的关系,因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速,以及便于实现测量过程自动化等优点,是频率测量的重要手段之一。在本次毕业设计中我们选择使用单片机来制作数字频率计,并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门,通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率,最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求,而且具有了单片机的稳定性和成熟性,且控制能力强,是一种低成本,高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct
- 2022-03-22 04:26:27下载
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单端反激式开关电源具有结构简单、输入输出电气隔离、电压升/降范围宽、易于多路输出、可靠性高、造价低等优点,广泛应用于小功率场合。然而,由于漏感影响,反激变换器功
单端反激式开关电源具有结构简单、输入输出电气隔离、电压升/降范围宽、易于多路输出、可靠性高、造价低等优点,广泛应用于小功率场合。然而,由于漏感影响,反激变换器功率开关管关断时将引起电压尖峰,必须用钳位电路加以抑制。由于RCD钳位电路比有源钳位电路更简洁且易实现,因而在小功率变换场合RCD钳位更有实用价值。 -Single-ended flyback switching power supply with a simple structure, input and output electrical isolation, voltage up/down range, easy to multi-output, high reliability and low cost, widely used in low-power occasions. However, due to leakage effects flyback converter power switch off when the voltage spike caused by the need to be inhibited by clamping circuit. RCD clamp circuit as a result of active-clamp circuit than the more concise and easy to realize, and in low-power transform RCD clamp occasions more practical value.
- 2022-01-21 05:30:24下载
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用4BIT OTP单片机实现USB/PS2 MOUSE的设计 USB 低速设备的设计发展到现在已经有了相当的成熟度。 各家IC公司都推出了USB DEVICE端...
用4BIT OTP单片机实现USB/PS2 MOUSE的设计 USB 低速设备的设计发展到现在已经有了相当的成熟度。 各家IC公司都推出了USB DEVICE端的解决方案, 一般以8 BIT CPU CORE + USB SIE为主流构架。 SH69P04是中颖电子(Sinowealth)本着丰富USB产品应用,降低USB IC成本而设计的4BIT OTP单片机, 用以开发USB DEVICE设备。-the design of usb or PS2 mouse
- 2022-06-14 14:09:40下载
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netizen with the VC6 preparation room management system, containing the source c...
网友用VC6编写的机房管理系统,内附源代码。-netizen with the VC6 preparation room management system, containing the source code.
- 2022-10-25 00:25:03下载
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To do this for some friends to help, you can look at the reference
对要做这个的朋友们有些帮助,可以看看参考一下-To do this for some friends to help, you can look at the reference
- 2022-04-12 18:47:28下载
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verilog HDL display module
verilog HDL显示模块 verilog HDL显示模块-verilog HDL display module
- 2023-01-04 22:00:04下载
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另外一个人事管理系统 有不错的功能 可供大家一起研究的
另外一个人事管理系统 有不错的功能 可供大家一起研究的-a separate personnel management system has good features for everyone research
- 2023-04-19 09:30:04下载
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垃圾压缩车的发展
垃圾压缩车的发展-The development of compressed garbage truck
- 2022-07-09 23:49:11下载
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Project "Control a roboter via WLAN with a GUI and a webcam"
Project "Control a roboter via WLAN with a GUI and a webcam"
- 2023-06-05 02:10:06下载
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记录实验中LM393的波形,及LM393芯片的一些原理调试图片。
记录实验中LM393的波形,及LM393芯片的一些原理调试图片。-Record experiment waveform LM393, LM393 chip and debug some of the principle of picture.
- 2022-02-04 07:17:48下载
- 积分:1