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PB101 Sync VCO
The Sync VCO is actually a pair of oscillators, a normal voltage controled oscillator and an other oscillator that syncronice the first one. It comes with a triangle and a square wave output.
In changing the capacitores one can change the range for the oscillators. The value should be between 10 and 50nF.
The circuit is based on a classic Voltage Controlled Oscillator (VCO). One can find for example the basic schematic in the data sheet of the LM358 OpAmp.
Schematic
That's the schematic for one oscillator:
Hardware
Paper-PCB
Parts
- Resistors:
- 1x 1 kOhm
- 1x 4.7 kOhm
- 4x 10 kOhm
- 10x 47 kOhm
- 4x 100 kOhm
- Capacitors:
- 1x 22 nF
- 1x 10 nF
- Electrolytic Capacitors:
- 2 x 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
- 1x 100k
License
The PB101 Sync VCO was designed by Wolfgang Spahn, 2017-20.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
