This is a circuit for your Christmas star.Here LEDS are fading gradually.And If you are creative you can make a wonderful creation through this circuit.And I hope to give you more Christmas circuits.So try thisParts:
C1 1µF 63V Polyester Capacitor
C2 100µF 25V Electrolytic Capacitor
D1-D4 etc 5 or 3mm. LEDs
IC1 LM358 Low Power Dual Op-amp
R1,R2 4K7 1/4W Resistors
R3 22K 1/4W Resistor
R4 1M 1/4W Resistor
R5 2M2 1/4W Carbon Trimmer
R6,R10,R11,R14,R15 10K 1/4W Resistors
R7,R8 47K 1/4W Carbon Trimmers
R9,R13 27K 1/4W Resistors
R12,R16 56R 1/4W Resistors
Q1,Q2,Q4 BC327 45V 800mA PNP Transistors
Q3,Q5,Q6 BC337 45V 800mA NPN Transistors
SW1 SPST miniature Slider Switch
Note
# If you dont like to use trimmers, suggested values for a 9V supply are:R4=3M9, R9 & R13=47K and trimmers replaced by a short.
# If you want to use 7 LEDs per strip R7 & R8 should be changed to 100K.and give 15v
