Propeller clock

Propeller clock is a special kind o f circular LED display. It is making use o f phenomena known as Persistence o f Vision (POV). Persistence of Vision, which means that if something appears in the same spot consistently, at least 50-60 times per second, our brains think that it’s permanently there when it is not. Conventional methods o f displaying images to public are using LCD display and dot-matrix LED board. Propeller clock is a device that project an image or time as if the images are floating in the air. The floating image is received because o f human eye limitation. The floating images emerge by synchronizing LED’s blink to form an image at particular time and rate. This propeller clock is mechanically scanned and displays in digital format. Made from scrap it can be used anywhere and everywhere and the interesting fact is that its crystal clear display. Maintenance and repairing o f the display is so easy. All the synchronizing can be implement through software. The propeller clock is designed to demonstrate how this project can display images or message. The purpose o f this project is to display LED clock by a mechanically rotating bar o f LED. The propeller clock is mechanically scanned LED Clock with LED that spin, giving the illusion of numbers floating in the air. This project consist two main circuits which are motor controller circuit and LED circuit. When DC motor is rotating, the floating image will appear. The synchronization o f DC motor speed and LED blink will cause the image visible to human eyes. So the desired image such as clock can be programmed and displayed.