The project is centered on the development of a microcontroller car speed alarm system that automatically alerts the driver by activating a panic alarm when the driver exceeds the speed restriction established in the system. The alarm is also turned off when the speed is dropped below the set limit. The car’s speed is monitored using a speedometer device. The time the alarm goes off is determined by the voltage output of the speedometer system. The system’s additional components include a power unit with a 5V regulator and a diode for reverse voltage protection, a microcontroller, an analog to digital converter (ADC), LEDs, resistors, transistors, cables, and a potentiometer. One was able to couple the components together to achieve the intended functions, which are indicated in the various chapters of this report, using the right steps, time, and knowledge. This method can be used to improve road safety and minimize accidents caused by excessive speeding.




The oil pressure gauge, coolant temperature gauge, fuel level gauge, tachometer, and other sensors and gauges are all organized on the dashboard instrument cluster of an automobile. The speedometer, though, is the most visible and possibly the most crucial gauge, at least in terms of how often you look at it while driving. The speedometer’s job is to display a car’s speed in miles per hour, kilometers per hour, or both. It’s an analog gadget that employs a needle to point to a specific speed, which the driver reads as a number written on a dial, even in late-model cars. The first speedometers, like any new technology, were expensive and only available as options. Automobile manufacturers did not begin to include a speedometer as standard equipment until 1910. Otto Schulze Auto meter (OSA), a historical firm of Siemens VDO Automotive AG, one of the major creators of current instrument clusters, was one of the original speedometer suppliers.

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