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R4
Resistance
500 Ω
R5
Resistance
500 Ω
R3
Resistance
500 Ω
LED5
LED2
LED3
LED1
BZ1
R1
Resistance
10kΩ
J1
SW3
SW2
SW1
J2
R2
Resistance
10kΩ
US1
J3

Dev Board 2