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SimageCAMMssi
仿真程序数控机床，数控机床，以模仿实际操作，有有一定的价值，很多共享！,可以直接使用。
(Simulation program CNC machine tools, CNC machine tools, to mimic the actual operation, the value of many shared Can be used directly.)
- 2012-06-08 18:49:00下载
- 积分：1
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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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wannianli
这是一个自制万年历的显示程序。能显示温度日期时间等。。。。。。(This is a homemade calendar display program. Can display the temperature of the date and time. . . . . .)
- 2012-06-22 14:49:14下载
- 积分：1
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KeyBorad
扫描4X4键盘,并将键值在数码管和8个LED上显示,同时将键值通过串口或RS232端口或USB发送给PC机接收并解码来自标准键盘的基本按键的扫描码。(4X4 keypad scanning, and key in the digital tube and eight LED display, while the key through the serial port or RS232 port or a USB send the PC to receive and decode the scan code of the key from the standard keyboard.)
- 2012-12-07 11:33:37下载
- 积分：1
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PS2key
本例是用51单片机的键盘解码程序，亲试好用(This case is a keyboard with 51 decoding process, pro-test handy)
- 2013-08-23 14:01:25下载
- 积分：1
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chankaochengxu
单片机基础资源的所有程序，包括汇编和C语言，非常的实用(All the procedures of the microcontroller basic resources, including assembly and C language, and very practical.)
- 2012-05-03 01:20:38下载
- 积分：1
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robot
超声波测距，测量精度为1cm，可以使机器人安全避障。(Ultrasonic distance measurement accuracy of 1cm, can make the robot obstacle avoidance safety.)
- 2013-11-13 10:35:13下载
- 积分：1
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BF51
BF51实验板CAN通信器件SJA1000驱动代码(BF51 experimental board SJA1000 CAN communication device driver code)
- 2011-04-27 17:37:18下载
- 积分：1
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nec_part3
A Beginner’s Guide to
Modeling with NEC vol 3
- 2014-10-15 08:30:40下载
- 积分：1
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cc2530-datasheet
cc2530zigbee芯片英文资料，数据手册(cc2530zigbee chip information in English, Data Sheet)
- 2013-08-24 15:02:02下载
- 积分：1
