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Voltage Controlled Oscillator Kit

Voltage Controlled Oscillator Kit

Regular price £3.99 GBP
Regular price Sale price £3.99 GBP
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Need an oscillator whose output frequency is adjustable with a voltage? Then look no further, as this kit by MitchElectronics will let you build a voltage-controlled oscillator! This kit is RoHS and REACH compliant, and is an excellent project for beginners and learners alike!

The Voltage Controlled Oscillator (VCO for short), is a very practical circuit for generating square and sine waves. While these waves can be produced using the Simple Function Generator Kit, the VCO allows for controlling the output frequency with the use of a voltage signal instead o using a potentiometer. This means that the output frequency of the VCO can easily be controlled by microcontrollers and other analogue circuits which can create some pretty interesting results. For example, a 1V octave synthesiser can be built using this module whereby a 1V octave keyboard is connected to an exponential converter which feeds its output into the VCO to produce keyboard tones. This circuit can also be used in retro ways such as sensor data transmission where the voltage output of a sensor is converted into a frequency and the frequency of the output will be proportional to the sensor reading (a similar system was done in early satellites such as Sputnik).

Product specifics

  • Component Count: 23
  • Battery Powered?: No
  • Operating Voltage: 5V to 16V
  • Operating Frequency: 0Hz to 36KHz (at 5V)
  • Output Voltage: VCC – 1.5V
  • Output Current: N/A
  • Dimensions (PCB): 60mm x 22mm
  • Mounting Holes: Yes
  • Prebuilt: No – Kit form
  • Batteries Not Included

Included in this kit

  • 2 x 8 DIP Socket
  • 2 x LM358
  • 2 x 1K Resistors
  • 1 x 10K Resistor
  • 4 x 47K Resistors
  • 2 x 100K Resistors
  • 1 x 1nF Capacitor
  • 3 x 100nF Capacitors
  • 1 x 2N3904
  • 1 x Red Wire
  • 1 x Green Wire
  • 1 x Blue Wire
  • 1 x Black Wire
  • 1 x PCB


The VCO is an ideal kit for those learning about oscillator circuits built around the LM358, and the ability to control the VCO with an external voltage source also makes the kit ideal for projects that have voltage-producing sensors. Applications for the VCO kit include synthesisers, function generators, matched square/triangle waveforms, switch-mode power supplies, and PWM generators.


Note that product specifics such as output frequency depend on the tolerance of the components. The numbers provided here are an approximation only.

All parts sold by MitchElectronics are compliant with RoHS and REACH directives which ensure that they can be used in commercial environments as well as complying with environmental laws.


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