Multi purpose LED flasher

422

07:16:38

        This circuit can flash three sets of LEDs with different levels of Flashing.The circuit uses a simple Astable multivibrator built around the popular timer IC NE555.Resistors R1(10k),R2(1M) and capacitor C1(550nF) determines the output frequency. When the output becomes high, Red LEDs lights first. When the capacitor C3(800uF) charges fully, Yellow LEDs light. The delay time between this depends on the value of C1. When the output of Astable turns low Green LEDs light using the current stored in the C3 capacitor. Since this cycle is very fast, different levels of Flashing can be obtained.

         APPLICATIONS;
 *Ornamental Displays
 *Timers
 *Alarms
 *Indicators       etc

published 11 years ago

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