基于51单片机的稳压电源设计——程序分为键盘处理、D/A、A/D和存储四个模块。运用扫描法，对键盘进行扫描，有按键就更改输入TLC5615的数值，ADD按键是对数据进行加以操做，长按的话使步进值增大，实现快加，SUB按键与ADD按键相同，预读取按键用于读取　ＡＴ２４Ｃ０４　中预置的数值，保存按键用于保存当前电压值；显示部分主要是对TLC549采集回来的电压进行处理显示，它主要是在定时器０的中断服务程序中显示，100ms刷新显示一次。TLC5615模块，通过对DA的串行数据输入，使其在输出电压时可控，输出电压后经LM324、三极管，加上负载输出电压，输出电压后，用TLC549芯片100ms采集一次，送到数码管显示。-Based on 51 single-chip power supply design- the program is divided into keyboard processing, D/A, A/D and storage of four modules. The use of scanning method, the keyboard scan, a key to change the value of the input TLC5615, ADD button is to do the data to do, long press the step value increases to achieve fast add, SUB button with the ADD key, Read key is used to read AT24C04 preset value, save the button for saving the current voltage　display part of the TLC549 is mainly the voltage collected back to deal with the display, it is mainly in the timer 0 interrupt service routine display , 100ms refresh display once. TLC5615 module, through the serial data input to the DA, so that when the output voltage controllable, the output voltage after the LM324, transistor, with the load output voltage, the output voltage, with TLC549 chip 100ms acquisition time, to the digital display.