U2
C3
Capacitance
Capacitance
A1
U4
J11
R17
Resistance
20KΩ
R14
Resistance
10KΩ
C4
Capacitance
Capacitance
R16
Resistance
10KΩ
R13
Resistance
20KΩ
J1
J12
R15
Resistance
20KΩ
J2
R12
Resistance
10KΩ