Presented by : -

Abinash ChoudhuryAbinash Choudhury

ContentsContents

• Introduction• Circuit Diagram• Circuit Description• PCB Layout• Features• Application• Conclusion

2

IntroductionIntroduction

• It is an digital speedometer-odometer which can be installed with a bike.

• Digital speedometers are found only in luxury cars and high-end motor bikes.

• The circuit uses an AT89C2051 Microcontroller, a 16x2 LCD display, 4N35 optocoupler, 24C02 EEPROM.

• It is better alternative to the mechanical speedometer & even beginner with min. skill level.

3

Circuit DiagramCircuit Diagram

4

5

Circuit DescriptionCircuit Description

• Microcontroller :- A 20-pin AT89C2051 microcontroller from ATMEL is used with CISE-Based 8051 family.

• LCD Module :- It is used to display the speed & distance traveled, here used a 16x2 alphanumeric LCD based on HD44780 controller.

• Serial EEPROM :- Electrical Erasable Programmable Read Only Memory.

• I2C Bus Protocol :- It is MultiMate bus, it uses serial data line (SDA) & serial clock line (SCL).

6

• Speed Sensor :- It sends a pulse to the microcontroller each time a revolution is made.

• Optocoupler :- It is used to count the effect of bouncing.

• Power Supply :- The power supply for the circuit is drawn from the vehicles is 12 volts.

7

PCB Layout PCB Layout

8

FeaturesFeatures• Digital read out.• Speed Displayed in km/hr.• Distance travelled displayed in km.• Readings saved in non-volatile memory.• Reliability due to use of the microcontroller.• No mechanical wear & tear.• Home-brewed speed transducer or sensor.• Self reset to zero after completion of

99999.9km.• Easy to built & fix on the bike.

9

ApplicationApplication• It is used in luxury cars & motor bike.• It is used to measured speed of the

motor bike.• It measures speed & quantity of fuel.• It is used to counting revolution and

speed calculation of cars.• It is used for conversion of speed &

display the result.

10

11

ConclusionConclusion

Considering the total requirement and need of society as well as according to cost analysis and project profitability statement it is concluded that the project microcontroller based speedometer-Cum-Odometer is technically viable, financially feasible and suitable for speed measurement.

12

13