LED定时器指示灯电路for Board Games

The article presents a simple LED indicator timer circuit which can be used with board games for indicating the elapsed time or the time consumed by the player to complete his or her turn. The idea was requested by Mr. Shane Robins.

技术规格

希望你一切都好。我对电路相对较新，我正在寻求创建DIY指示灯光线。我希望我的指示灯呈绿色约35秒，然后将黄色变为10秒钟，然后转动并保持红色直到电路关闭。

它可以是三个不同的灯光或多色光，电池电源低电压（9V或更小）。一旦电源关闭并再次重新打开，电路必须重置定时器。

我尝试了利用晶体管，电容和继电器的电路，但是不成功。如果可能，我想避免arduino板/编程。这是您看来的可能性吗？如果是这样，你能否向我提供接线原理才能实现这一目标？

谢谢你这么快回到我身边！我们扮演一个叫做Catan的定居者的棋盘游戏，我的室友永远在轮流上。

我希望有一个系统来限制转弯而不使用计时器。真的是我建立一个赛道的借口，因为我真的对此感兴趣。我真的希望它是便携式的，低电压。像9V或更好的2AA串联3V。

该设计

The proposed LED timer indicator circuit can be implemented with the help of the following simple circuit idea.

此配置已在此博客中的许多不同电路应用中使用，并且它似乎与其范围相当多样化。

IC 555是被配置为用于产生大约2.5秒的ON / OFF占空比的测量电路，其被馈送到IC 4017引脚＃14的时钟输入。

响应于555输出的每个正或上周期边缘，IC 4017从引脚＃1开始，从一个输出引脚输出从一个输出引脚到下一个输出引脚跳转到下一个输出引脚。

This implies that initially pin#3 is high, then after a clock cycle of 2.5 + 2.5 second ON+OFF time, the logic high from pin#3 jumps to pin#2, and so on until pin#11 is reached.

In the diagram pin#3 to pin#5 can be seen joined and terminated to a green LED, which ensures that as long as the logic high is jumping across these pinouts, the green LED stays switched ON, and since the total time taken for the logic high for crossing these pinouts 5 x 7 = 35 seconds, the green LED remains ON for this period of time, as requested by the user.

一旦经过上述时间框，绿色LED关闭，黄色LED亮起，逻辑高现在在引脚数6和9上行进，并且静静地保持黄色LED接通5 x 2 = 10秒。

Finally, the logic jumps to pin#11 of the IC, shutting off the yellow LED, and illuminating the red LED.

However since the pin#11 is also connected with pin#13, latches the IC into this position permanently. In this position the IC stops responding to the clocks fed by the IC 555, and the red LED stays locked and illuminated in this position until the power is switched OFF and switched ON again.