ELECTRIC DIAGRAM
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SCHEMATIC 1

R1,R2=10 KOhm
C1=10 NF
C2=47 MicroF elettrol.
C3,C4=100 MicroF elettrol.
D1,D2=1N4148
IC1=NE555
IC2=LM7905 (o 7908-7912 ecc.)

SCHEMATIC 2

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