高级多时段计时器，主要用于学校上下课的打铃、闹铃，您可以自己设置自己的铃声。 程序包内还附带了2种不同格式的 LED字体文件，均由本人修改而来，请将字体文件复制到系统字体文件夹内，能正常显示，现在拿出来与大家共享。-Advanced multi-period timer, mainly for schools, schools in the fight bell, alarm, you can set up your own ring tones. Inside the package al

自己制作的一个简陋打铃器。 可以实现定时、手动上课下课铃声。-Produce their own crude hit a bell device. Timing can be achieved manually school class ring.

电脑打铃器的visual Basic 打铃程序，包括算法和实现，特点是用了spreadsheet表-Computer to play bell bell device visual Basic procedures, including algorithms and implementation, and there is a spreadsheet table with

单片机开发，定时打铃器，南航科院课程设计。-Microcontroller development, from time to time the bell