A digital speedometer is a device that gives the current speed of a moving object. It can usually be seen in motor vehicles. Like the older models, this device is also essential in the operation of vehicles, because it gives the person controlling the vehicle/machine awareness of their speed so that they can maintain the correct speed and avoid hitting something on the road. .
The digital speedometer has a couple of advantages over its predecessor, the analog speedometer. One of the advantages is that digital ones produce more accurate and reliable readings. This is because digital speedometers use speed sensors that actually read the vehicle’s moving speed and then send the results to the speedometer’s microprocessor, which is responsible for the display. Another advantage is that digital speedometers show the speed measurement in numbers, which is much more readable than the clock-like display of analog ones. Drivers suffering from impaired vision would surely prefer the digital ones as they would no longer have to look at the pointers and unclear lines between digits on the clock-like display.
There hadn’t been many revisions to the digital speedometer. In fact, only a couple of new parts have been added to make it work properly. As I mentioned in the previous paragraph, you have and should always have a microprocessor that comes with an IC1 and an IC3. IC1 acts as a minicomputer and regulates the speedometer voltage, while IC3, a minicontroller, provides many special functions such as lock, reset functions, and trigger signal functions. As for the speedometer display, a 2-column mini-LCD monitor is provided that can display up to 16 characters.
Outside the minicomputer system is IC4 and a sensor that measures the speed of rotation of the wheels. A magnet is attached to a wheel for detection. It will pass the detector once for each rotation of the wheels; each rotation equals a single detection. The detector will then generate pulses based on the number of detections it has made (the ratio is 1:1). The IC1 will then calculate the pulses, after which digits indicating the speed (miles or kilometers) per hour will appear on the LCD. An interesting feature has also been added to the latest models, namely the ability to calculate the distance the vehicle has traveled from the last time the engine was started to the last time it was stopped.
It is a fact that both analog and digital speedometers cannot give the exact speed at which a vehicle is running. However, the digital speedometer has an advantage over the analog ones in terms of accuracy, as it is the “upgrade” of its predecessor. They may have some differences, but they share a common purpose, that is, to guide the driver for safe driving.