PB107 Sync VCO II

That is a version of the PB101 Sync VCO with a poti for shaping the waves. In square wave mode one can change the duty cycle and in triagle mode one can change the wave from triangle to ramp.


Schematic



Paper PCB

Parts

  • Resistors:
  • 1x 1 kOhm
  • 1x 4.7 kOhm
  • 2x 3.9 kOhm
  • 4x 10 kOhm
  • 8x 47 kOhm
  • 4x 100 kOhm
  • Capacitors:
  • 1x 22 nF
  • 1x 10 nF
  • 2x 10µF
  • Diodes:
  • 1x 1N4148
  • Semiconductors
  • 2x BC547 transistor
  • 2x LM358 OpAmp
  • Mechanical:
  • 2x IC socket, 8pins
  • 1x pin strip 1×14
  • 2x pin header, female 90° 1×3, 1×2
  • 2x pin header, male 90° 1×3, 1×2
  • 4x jumpers
  • 1x mini switch
  • Potentiometers:
  • 2x 10k
  • 2x 50
  • 1x 100k