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1callerID
giai ma DTMF bat so dien thoai goi den bang ic chuyen dung.
- 2020-06-16 07:00:01下载
- 积分：1
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STC--Electric-bike-scheme-
单片机STC12C5404 本程序为无刷电机48V30A三相6拍智能版本-PCB上Q孔P14口对地后开电门锁系统将自动进入64种相序接法自动识别功能。带有AD霍尔数据采集鉴相，STC无刷清单及说明，STC做板文件，STC_sch，STCt贴片图等等全套文件，非常有价值。(MCU STC12C5404 This procedure take intelligence of 48 v30a three-phase brushless motor 6 version- P14 hole on PCB Q of driving electric door lock system will be automatically entered into after the 64 kinds of phase sequence connection automatic identification function. With AD data acquisition phase, hall on STC brushless list and instructions, do board files on STC, STC_sch, STCt patch figure and so on a full set of file, very valuable.)
- 2016-10-19 17:22:28下载
- 积分：1
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ALIENTEK-MINISTM32-17
ALIENTEK MINISTM32 实验17 SPI实验(The ALIENTEK MINISTM32 experiment 17 SPI experiments)
- 2013-04-20 16:34:03下载
- 积分：1
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led_display
输入一个数字，数码管可倒计时显示数字，显示到0后又重新显示(Enter a number, digital countdown display digital display to 0 and then redisplay)
- 2013-12-29 16:54:39下载
- 积分：1
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step
用proteus仿真实现BLDC无刷直流电机的控制，目前仅工作于开环状态，可以参考一下。(BLDC brushless DC motor control is realized by Proteus simulation. At present, BLDC brushless DC motor only works in open-loop state, which can be referred to.)
- 2019-07-10 15:01:55下载
- 积分：1
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7128
7128芯片设计原理图，适合3A一下电流的步进电机驱动器设计，非常实用(7128 chip design schematics for what current 3A stepper motor driver design, very practical)
- 2013-08-25 20:57:18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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MT-003
了解SINAD、ENOB、SNR、THD、THD + N、SFDR，不在噪底中迷失。用于定量表示ADC动态性能的常用指标有六个，分别是：SINAD(信纳比)、ENOB(有效位
数)、SNR(信噪比)、THD(总谐波失真)、THD + N(总谐波失真加噪声)和SFDR(无杂散动态
范围)。(Learn SINAD, ENOB, SNR, THD, THD+ N, SFDR, lost not noise floor. For quantitative expression commonly used indicators of the dynamic performance of the ADC six are: SINAD (SINAD), ENOB (effective number of bits) and SNR (signal-to-noise ratio), THD (total harmonic distortion), THD+ N ( The total harmonic distortion plus noise) and SFDR (spurious-free dynamic range).)
- 2013-03-19 17:16:03下载
- 积分：1
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VB-remote-player-by-infrared-
基于AT89S52的VB遥控播放器红外遥控解码(Infrared remote control decoder based on AT89S52 the VB remote player)
- 2013-01-15 22:46:48下载
- 积分：1
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lcdmain
说明： 基于F120的应用程序，包括字符液晶、AD、串口，以及算法等！只用于学习交流！(F120 based applications, including character LCD, AD, serial, and the algorithm! Only for the exchange of learning!)
- 2006-03-02 16:06:49下载
- 积分：1
