Stroboscopic lighting effects for discotheques are achieved by conventional White Light Emitting Diode (LED) replacing the discharge lamps for higher efficiency and low cost. This control is possible by instant on and off the LEDs at higher voltages for less time period by pulse width modulation. This fast control of intensity from full glow to full off helps in developing a stroboscopic effect which is generally used in disco dance floors for better effects. A programmable microcontroller from 8051 family is engaged to provide such effect being driven by a MOSFET for cluster of LEDs. The duty cycle of the PWM increases progressively and decreases in certain time interval. The power supply consists of a step down transformer 230/12V, which steps down the voltage to 12V AC. This is converted to DC using a Bridge rectifier. The ripples are removed using a capacitive filter and it is then regulated to +5V using a voltage regulator 7805 which is required for the operation of the microcontroller and other components.
For more details about this project, please visit http://www.efxkits.com/project-kit/microcontroller/1063.html
HARDWARE REQUIREMENTS:
Transformer, Diodes, Capacitors, Resistors, LED’S, Micro controller unit, White LEDs, IRF530 (MOSFET), Crystal Oscillator.
SOFTWARE REQUIREMENTS:
Keil compiler, Language: Embedded C or Assembly.
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