Christmas star

-

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 this








Parts:

C1 1µF 63V Polyester Capacito

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