Rev logger and counter for automobile engine monitoring

This thesis will bring out the hardware development to count the total revolution and revolution per minute pulses that comes from the primary winding of the car's ignition coil. This two device will be in digital readout display The digital tachometer can replace the existing analog tachometer, which displays just the average values of the crankshaft's revolution. The rev logger is the new invention for automobile indication system since it count the number of crankshaft revolution, thereby give the exact automobile engine's lifetime. This design can replaces the car's odometer as indication to the total engine running and also for engine's fluid and peripheral that needs to be changed. The circuit was simulated using Electronic Workbench Version 5.12.