Mechanically Scanned Clock With LED Display

Fadilah, Mohamad Najuri (2006) Mechanically Scanned Clock With LED Display. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This project is a different view of holographical clock made from only 7 LEDs, construct in vertical arrangement. It will be the coordination of electrical and mechanical engineering. This illusion is based on inertia of human eye. The clock consists of motor and seven LEDs that are arranged in a vertical line. The motor spins at a constant rate such that the LEDs rotate around a center pivot point. As the LEDs spin around they light up sequentially such that they will display the current time. The motor spinning fast enough that the human eye will perceive all of the display is on at once, and the viewer will be able to read the time correctly. If LED formed digits will periodically and frequently enough flash, they will appear solid and steady. A microcontroller is used to keep the time and blink the LEDs in an appropriate pattern to show the numbers. It has to be programmed so that it will both keep time and also send the appropriate signals to the LEDs to light them in the correct sequence. Its looks like the digital numbers are floating in thin air.

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