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cheng
滤波器广泛应用于数字信号处理、通信、自动控制领域,但设计可变宽频带有源滤波器则比较困难。利用单片机控制参数可编程的双二阶通用开关电容有源滤波器,精确设置有源滤波器的中心频率f，品质因数Q及有源滤波器的工作方式。本系统主要分为两个部分:即程控滤波器和程控放大器。程控放大器电压增益为40dB，通过单片机控制DA进行分压，可精确实现要求的10dB步进，误差小于0.5 ，通带为100Hz-500KHz，输入电压峰－峰值范围为10mV，在输入范围内无明显失真。由MAX264为核心的滤波器，可设置为高通、低通滤波器。通过单片机直接给出控制频率，使-3dB截止频率在1KHz-20KHz内可调，步进1KHz，误差小于1 。整个系统以52单片机为控制核心，电路简单，性能稳定，且具有较高精度，滤波参数调节通过单片机控制，较为方便。(Filters are widely used in digital signal processing, communications, automatic control area, but the design variable wideband active filter is more difficult. Control parameters using single-chip programmable universal switched-capacitor biquad active filter, active filter accurately set the center frequency f, quality factor Q and the active filter works. The system is mainly divided into two parts: the program-controlled filters and programmable amplifiers. Programmable amplifier voltage gain of 40dB, the DA through the partial pressure of single-chip control, can accurately achieve the required 10dB step, the error is less than 0.5 , passband to 100Hz-500KHz, input voltage peak- the range of 10mV, the input range no significant distortion. By the MAX264 as the core of filter can be set to high pass, low pass filter. Given directly by the microcontroller controls the frequency, the-3dB cutoff frequency at 1KHz-20KHz adjustable, step 1KHz, error is less than 1 . The entire system for)
- 2011-07-17 16:23:27下载
- 积分：1
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stm32F105CAN
MDK环境下实现STM32F105,双CAN中继的功能。(MDK environment the STM32F105, CAN relay function.)
- 2013-05-14 15:25:01下载
- 积分：1
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I2C_ADS
使用microchip公司的DSPIC33FJ16GS504作为控制器，模拟I2C总线与16位AD芯片ADS1100实现通信。误差10mv以内。(Using the microchip company DSPIC33FJ16GS504 as a controller, I2C bus and 16-bit analog AD chip ADS1100 communication. Error of less than 10mv.)
- 2011-11-24 16:22:26下载
- 积分：1
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clock
本作品可实现如下功能：
1. 显示年、月、日、星期等日期项
2. 显示时、分、秒等时间项
3. 测量并显示温度
4. 秒表（含开始，暂停，继续，复位等）
5. 闹钟（含开关，时间设定，是否启用的标志等，精确到秒）
6. 时间和日期的校正（加减均可）
(The works can achieve the following functions: 1 year, month, date, day of the week, the date of entry. Displayed, minutes, seconds time of 3 to measure and display the temperature. The stopwatch (including start, pause, resume, reset etc. ) 5 alarm (including switch, time set, the flag is enabled, accurate to seconds) the time and date of the correction (addition and subtraction can be))
- 2013-04-06 12:17:45下载
- 积分：1
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STC-C51V900-bugfixes
1、修复0xfd Bug：是通过替换C51.exe和CX51.exe实现的，本补丁所提供的C51.exe和CX51.exe是使用原版的文件修改制作。对于其准确性，不做任何保证。2、添加STC单片机列表：是通过替换UV4.cdb文件和添加STC头文件实现的，本补丁所提供的UV4.cdb是根据STC官方公布的UV3.cdb文件制作。其准确性不做任何保证。3、STC的头文件（支持鼠标右键插入头文件）：头文件是从STC官网下载的，未作任何更改。头文件中虽然有STC12C54XX系列单片机的头文件4、运行程序后点击“安装程序”即可，详细说明点击“了解详情”进行查看(A repair 0xfd Bug: by replacing C51.exe and CX51.exe achieve, the patch provided C51.exe and CX51.exe is to use the original file to modify production. For its accuracy, without any guarantees. 2, add STC SCM list: Yes, and add files by replacing UV4.cdb STC header files to achieve, this patch is provided UV4.cdb UV3.cdb under STC official document production. Its accuracy is not guaranteed. 3, STC header files (support right into the header file): header files are downloaded from the official website of STC, did not make any changes. Although there STC12C54XX header file MCU header files 4, run the program and click the " Setup" button, a detailed description click on the " learn more" to view it)
- 2013-08-01 10:15:49下载
- 积分：1
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CCS编译器
说明： PICccs编译器包含破解方式，验证可以正常使用。(The PICccs compiler contains cracking methods to verify that it can be used properly.)
- 2020-06-22 14:20:02下载
- 积分：1
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pkkh
pscad miro grid control
- 2013-07-18 18:33:25下载
- 积分：1
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CY7C68013
cypressUSB芯片CY7c68013A的开发板原理图和例程可以直接使用，很值得学习(cypressUSB CY7c68013A chip development board schematics and routines can be used directly, it is worth learning)
- 2016-12-05 23:42:04下载
- 积分：1
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SPI
利用单片机MSP430f149单片机实现的 实验十二 SPI接口扩展RF通信(The use of single-chip MCU MSP430f149 Experiment 12 SPI interface extensions RF communications)
- 2014-02-25 15:28:44下载
- 积分：1
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MFCStatus
parker acr9000运动控制器上位机程序开发例子，主要包括控制器连接和断开以及读取变量(Parker acr9000 motion controller PC program development example, mainly including controller connect and disconnect and read the variable)
- 2020-09-10 05:08:03下载
- 积分：1
