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自己写的一个带有松手检测和长按识别，短按识别，长短按区分的键盘扫描程序(Write your own keyboard scanner with a loosely detection and long-identification, press recognition, length according to the distinction)

nrf2401 发射机和接收机双向同步跳频，在35个信道上来回跳 超级防干扰(Nrf2401 two-way synchronization of fh transmitter and receiver, jump to and fro on the 35 channels Super tamper-proof)

通过把开机次数记录在24C02中，并在数码管上显示出来， 124C02的写保护脚为低电平，即允许写(Boot number of records in the 24C02, and displayed on the digital 124C02 write-protect pin is low, that is allowed to write)

51单片机控制智能小车循迹小车c源程序5路循迹(51 MCU control smart car)

51单片机智能循迹小车，c语言程序和教程(51 MCU intelligent tracking car c language tutorial program)

本人自己编写的电子贺卡程序，带有音乐播放，和12864的图像显示(I have written an e-card program with music playback, and image display 12864)

51单片机加1602显示计算器C语言源码 可以实现加减乘除，有负数计算 (51 MCU plus 1602 display calculator C language source code Can have negative calculation add, subtract, multiply and divide.)

点阵液晶屏的参考程序，内置菜单动能，大家可以研究一下(Dot matrix LCD screen reference program, built-in menu kinetic energy, we can look)

说明：  用4*4矩阵键盘给液晶1602送四位数，其中第四行按键设置为功能键，按键显示可调对应位的数字(With 4* 4 matrix keyboard to send the four-digit LCD 1602, the fourth line of buttons is set to function keys, adjustable button displays the corresponding number of bits)

SIM900开发板配套STM32 GPRS代码(SIM900 STM32 GPRS driver)