dtmf

说明：  用于绘制LLC的增益曲线。把这段代码放到Matlab里，运行，就能够绘制出来LLC的增益曲线了。(This code is used to draw the gain curve of the LLC converter.)

NEC单片机的IAR编程环境操作说明简介。(NEC microcontroller programming environment IAR instructions Introduction.)

单片机上电以后LCD屏上显示欢迎回家， 先验证指纹再验证密码 ，同时验证成功开锁 指纹和密码分别可以验证3次 3次都错蜂鸣器响 ，按下manage键进入管理员模式 可以修改密码 删减指纹，指纹用开关量表示(After the microcontroller is powered on, the LCD screen shows welcome home. First verify the fingerprint and then verify the password. At the same time, verify the successful unlocking fingerprint and password can verify that the buzzer rings three times and three times respectively. Press the management key to enter the administrator mode to modify the password and delete the fingerprint. The fingerprint is expressed by the switch.)

根据stm32f103自带DA功能和DMA实现输出正弦波,可根据改变定时器周期改变正弦波频率。(According to the DA function and DMA of stm32f103, the output sinusoidal wave can be realized, and the frequency of sinusoidal wave can be changed according to the period of timer.)

数字电子时钟是一种使用数字电路技术实现时钟、分钟和秒钟定时的设备。 它在其他电子时钟中具有更高的准确性和主观性。数字钟包含扩展功能和基本功能。其中，基本功能部分：以数字形式准确定时，显示时、分、秒的功能; 扩展功能部分： 日期显示、闹钟、温度显示。(A digital electronic clock is a device that uses digital circuit technology to achieve clock, minute, and second timing. It has higher accuracy and subjectivity in other electronic clocks. The digital clock has two parts, basic functions and extended functions. Among them, the basic function part: accurate timing in digital form, display hours, minutes, seconds function; extended function part: date display, alarm clock, temperature display.)

基于MSP430F5438A的单相SPWM,产生，脉宽可调，波形完美，频率可调(MSP430F5438A-based single-phase SPWM, generation, pulse width adjustable waveform perfect, adjustable frequency)

1.5A Fast Ultra Low Dropout Linear Regulators

说明：  两轮平衡车中通过速度环和直立环的串级环实现小车平衡与遥控(Balancing and remote control of two-wheeled balancing car by cascade ring of speed ring and vertical ring)

矩阵键盘密码锁+简易计算器，C52的单片机平台，C语言开发，适用于初学学习。(Matrix keyboard lock+ simple calculator, C52 MCU platform, C language development, suitable for beginners to learn.)

永磁同步电机的预测控制，需要的下载，做毕设，科研的朋友们可以看一下(Predictive control of permanent magnet synchronous motor, the need to download, so Albert located, scientific friends can look at)