A quick and dirty Voltage Controlled Oscillator on a Proto 1 Module

A quick and dirty Voltage Controlled Oscillator using a Proto 1 Eurorack Module by Reckless Experimentation Audio LLC

Module can be purchased here
http://recklessexperimentationaudio.com

Schematic here
https://www.pdf-archive.com/2017/01/2...

Parts list
Part Value
C1 105
C2 105
C3 106
C4 106
IC1 7555
IC2 LM833
IC3 LM833
J1 jack built into breadboard module
J2 jack built into breadboard module
J3 jack built into breadboard module
Q1 2N3906
R1 100k
R2 100k
R3 100k
R4 100k
R5 100K
R6 470
R7 10K
R8 10K
R9 4K7
R10 47K
R11 47k
R12 47k
R13 1K
T1 2N3904