Radio synchronous master clock / Abd. Rahim Isnin

• Main Author: Isnin, Abd. Rahim
• Format: Student Project
• Language: English
• Published: 1994
• Subjects: Radio
• Online Access: https://ir.uitm.edu.my/id/eprint/99500/1/99500.pdf; https://ir.uitm.edu.my/id/eprint/99500/

This project is about a microprocessor based digital clock. The digital clock comprises of two stepper motors for the movement of hour's and minute's hand, and a LED display for seconds. Both of the hands are located at the same axis while the led display is made by using four 16 bits decoders to show 60 outputs. Since the digital clock used minutes and hours hand to show the time it seems just like an ordinary mechanical clock, except for the seconds display where it use LEDs. Unlike a mechanical clock where there is a lot of gears involves for the movements of the hands, this digital clock has only two gears. In another words the complexity of a mechanical clock has been simplify by using a microprocessor. Another advantage of using a microprocessor is that some intel ligence can be given to the system. For example the motor use might not be exactly 1 degree of movement for 1 pulse, in this project the motors used give out 1.8 degree of movements for every 1 pulse. Since the number of degree are not equal to the number of pulse, error in movements can not be avoided.