用PIC16C72A做的99分钟倒计时。控制AC220V电源开关。

时间精确，安全可靠。具有实际应用价值。

按RA4按钮设置指定的时间值，松开按钮。开始计时。

继电器闭合，电源AC220V接通灯亮。

数码管显示00时，继电器断开AC220V切断灯灭。

可把HEX文件直接写入PIC16C72A按图接线即可。

好用请推荐，大家学习。有好的程序请发切实可行

的。不懂上网学习是好事，但不要发些糊弄人的东西。

我下载了许多无用的东西，浪费时间还被搞糊涂了。

-Using PIC16C72A to do 99 minutes of the countdown. Control AC220V power switch.

The time accurate, safe and reliable. With practical application value.

Press RA4 button to set the specified amount of time, release the button. Start timing.

The relay is closed, the power supply is switched on the lights AC220V.

00 digital tube display, relay disconnect AC220V cut off.

The HEX file directly into the PIC16C72A according to the wiring diagram can be.

Good please recommend, all learning. A good program please send feasible

The. Do not understand the Internet learning is a good thing, but not to fool people.

I downloaded a lot of useless things, wasted time confused.

双语对照