Abstract:
PIC control application is widely used and popular in modern elections. The aim of this paper is design and construct the fan speed control system with microcontroller. PIC 16F877 and photo transistor is used for the system. User define speed can be selected by keypads for various speed. Motor is controlled by the pulse width modulation. The system can be operate with normal mode and timer mode. Delay time for timer mode is 10 seconds. The feedback signal from sensor is controlled by the proportional integral derivative equations to reproduce the desire duty cycle.
