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U1
J
R1
Resistance
500 Ω
R2
Resistance
500 Ω
J
pf
10k
Resistance
500 Ω
pf
J3
C2
Capacitance
0.1uF
J7
C1
Capacitance
0.1uF
R4
Resistance
47kΩ
C3
Capacitance
Capacitance
J1
R3
Resistance
1kΩ
C4
Capacitance
0.1uF
LED2
LED1
U2

microcontroller board

microcontroller board thumbnail