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该电源以单端反激式DC-DC变换器为核心。市电通过自耦式调压器，隔离变压器，整流滤波后产生直流电压，经DC-DC变换得到题目所需输出电压，实现了开关稳压电源的设计。(The power to single-ended flyback DC-DC converter at the core. City through the auto-type voltage regulator, isolation transformer, rectifier filter DC voltage generated by the DC-DC conversion has been the subject output voltage required to achieve a switching power supply design.)

说明：  针对音量IC：M61540的控制程序，适合5.1音响系统。(For volume IC: M61540 control procedures, suitable for 5.1 sound system.)

C51 designed using the binary clock

STM32 模拟的U盘包含两个盘符，一个是SPI读取TF卡，另一个是36K片上Flash，挂载了Fatfs(STM32 USB2.0 massstorage example)

通过一个简单例子，说明C语言对于学习单片机的重要性，有助于新手的入门.(By a simple example to illustrate the C language for learning the importance of SCM to help novice entry.)

stm32实现pwm波形输出，脉冲宽度调制(PWM),STM32 F1 TIM4 4通道PWM同时输出(STM32 realizes PWM waveform output, pulse width modulation (PWM), STM32 F1 TIM4 4 channel PWM output at the same time)

利用at芯片存储数据，具有掉电不丢失。模拟我们手机开机关机多少次。(Using the at chip to store data, there is no loss of power loss. Simulate how many times our phone is turned off.)

说明：  pda project using pda

Infineon XC878平台 Multi-CAN編程範例程序(4)(Infineon XC878platform Multi-CAN programming guide exam (4))

Stock and payment system