Schematic of VCO
U3
R7
Resistance
56kΩ
R2
Resistance
100kΩ
R3
Resistance
100kΩ
R8
Resistance
100kΩ
R1
Resistance
56kΩ
U1
R6
Resistance
56kΩ
R5
Resistance
56kΩ
C1
Capacitance
4nF
U4
U2
R4
Resistance
100kΩ
R9
Resistance
100kΩ
Q1