Digital Instrument Display For Cars

Junainah , Leman (2008) Digital Instrument Display For Cars. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

Almost every car use analog meter. Analog meter has weaknesses Drivers are unable to estimate quantities such as the volume of oil and engine temperature. To tackle this problem a digital Instrument display for cars project is to be designed. This project consists of two parts, hardware and software development. Based on a PIC microcontroller, these projects convert the analogue instruments in the car to a digital display. It is suitable for use with fuel gauges, oil pressure gauges or temperature gauges. It is also, ideal for use with sender units that have relatively slow changing values. In operation the unit can be calibrated so that the display will show any value in the range from -99 to 999. The decimal point can also be placed in one of two positions, so that the values can be from -.99 to 99.9. In addition, the unit can be calibrated to display metric or imperial units. Fuel and temperature gauges do not usually show precise values. Instead, they give a general indication of how things are going, they also remaining fuel level between full and half empty and temperature midway between hot and cold. By contrast, it can calibrate this digital display unit to show the actual values. The digital instrument display is calibrated at two values and the instrument calculates the remaining values from these in a linear fashion. For example, if the unit is to be used as a fuel gauge it is best calibrated when the fuel tank is full and then calibrated when the tank is close to empty. The display will then subsequently be able to show the remaining fuel in the tank over the complete range from full to empty. Through reading broadcast driver can detect oil volume and engine temperatures during the journey go and back. This readings can also record in the system computerize as reference.

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