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LED2
LED3
LED1
LED4
C1
Capacitance
1uF
C3
Capacitance
1uF
R2
Resistance
1KΩ
Q1
Q2
C4
Capacitance
1uF
US3
R1
Resistance
1KΩ
BZ2
C2
Capacitance
1uF
US2
BZ1
US1
U1

Smart Parking System Reference Design