充电盒

步进电机驱动，四相五线步进电机控制的测试程序，C51编写，读者可稍加修给即可应用(Stepper motor driver)

s51控制的ds18b20温度检测模块 源码用keil编译的(s51 ds18b20 temperature control detection module source code compiled with keil)

Binary Bomb Project. Sample bomb and the phases that need to be diffused. Good practice for assembly programming

an important eBooks for the basic ideas and advanced concepts of the Cognitive radio Networks . These eBooks are not free and I uploaded them for help other researchers and students.

51单片机开发步进电机源代码及报告解释说明(a progress of 51MCU introduction)

无线充接收端的程序，加入PI调节，合乎QI协议(wireless charger receiver)

单片机控制LED七彩渐变程序单片机控制LED七彩渐变程序(SCM control LED Colorful gradient program)

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)

基于STM32单片机，运行平台是KEIL,实现简单的AD转换。适合初学者。(Based on STM32 microcontroller, the operating platform is KEIL, to achieve a simple AD conversion. Suitable for beginners.)

freeRTOS stm32103 stm32 F1054