Drive Safely wth Speed Alarm
![](https://www.simplecircuitdiagram.com/wp-content/uploads/2011/02/Speed-Alarm-519x198.jpg)
At high speed, visually checking your speedometer to keep under maximum speed can be dangerous. It will be much safer if we put an audio alarm system to give a warning if the speed reach a certain threshold. To build a speed alarm circuit, two IC timers are needed. The alarm will beep if the input frequency is greater than […]
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