iphone 31天开源工程中的第一个，一个精美的计时器-Just like any good programmers we decided to bite this off the same day Apple lifted the NDA even faced with the time constraints. Needless to say the first app will be VERY simple, however it does demonstrate some stuff

UP COUNTER, 4 LED displays, memory (in case supply down counter will be save counted impulse, after the power is available again counter will count from memorized value), only the button RESET can clear the counted value.

用C#写的一个计时器（倒计时），可以选择时间类型（秒，分钟，小时）时间结束会弹出messagebox进行提示。-Using C# to write a timer (countdown), you can the type of time (seconds, minutes, hours) in time ends messagebox will pop up prompt.

count up/down with dspic 24fj128 simulation with proteus