Propeller Clock


Abstract:
The Propeller Clock is an electronic device which has a series of LEDs on board that rotate with the help of a motor to give an illusion of a watching a clock ( Digital or Analogue ). This requires a DC motor which rotates the PCB connected to it with sufficient speed so as to create the illusion. The LEDs are connected to a microprocessor PIC16C84 or 16F84 which is so programmed to switch ON and OFF the LEDs in a sequence and with a time delay to approximately match with the rotating speed of the motor. One of the phases of the DC motor is directly fed back to the microprocessor to identify the position of the motor at any instant.