Electronics Circuit Diagram

The following schematic shows the design of a simple Christmas Star Circuit Diagram using NE555 Timer. When we switch on this circuit, the brightness of lamp L1 gradually increases. When it reaches the maximum brightness level, the brightness starts decreasing gradually. And when it reaches the minimum brightness level, it again increases automatically.

Christmas Star Circuit Parts/Components List:

R1 ___ 1K
R2 ___ 100K
R3 ___ 10K
R4 ___ 10K
R5 ___ 270K
VR1 ___ 1M
D1 – D5 ___ 1N4007
DIAC ___ DB3
SCR ___ TYN6004 4A, 400V
C1 ___ 47uF, 25V
C2 ___ .01uF
C3 ___ 470uF, 25V
C4 ___ .1uF, 400V
L1 ___ 230V lamp
IC1 ___ NE555
IC2 ___ MCT2E

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