This circuit can be used to decorate your Christmas star.Here the LED light up gradually and disappear gradually.you can attach 6 LEDs for this.Supply 4.5v - 6v for this circuit.Here we have used femous IC LM358 .So you all will be able to find that IC easily.
Parts
IC1__________LM358 Low Power Dual Op-amp
Q1___________BC337 45V 800mA NPN Transistor
R1,R2___________4K7 1/4W Resistors
R3_____________22K 1/4W Resistor
R4______________2M2 1/4W Resistor
R5_____________10K 1/4W Resistor
R6_____________47R 1/4W Resistor
C1______________1µF 63V Polyester Capacitor
D1_____________5mm. Red LED
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