How to Use VC-02 Module: Examples, Pinouts, and Specs

The VC-02 Module, manufactured by Ai-Thinker Technology Co., Ltd., is a Voltage Controlled Oscillator (VCO) designed for use in electronic circuits where frequency modulation is required. It is an essential component in synthesizers, audio equipment, and signal processing devices, allowing for the generation of waveforms whose frequency can be precisely controlled by varying the input voltage.

• Audio synthesizers
• Frequency modulation (FM) synthesis
• Signal generators
• Electronic music production
• Test and measurement equipment

• Operating Voltage Range: 5V to 12V DC
• Frequency Range: 100 Hz to 20 kHz (typical)
• Output Waveforms: Sine, Square, Triangle
• Temperature Stability: ±0.5% (0°C to 70°C)
• Linearity: 0.1% (max deviation from linear frequency control)

1. Power Supply: Connect the Vcc pin to a DC power supply within the specified operating voltage range. Ensure the GND pin is connected to the common ground of your circuit.
2. Frequency Control Voltage: Apply a control voltage to the Vin pin to set the desired frequency of the output signal. The frequency is directly proportional to the input voltage.
3. Output Signal: Connect the OUT pin to the next stage of your circuit (e.g., amplifier, mixer, or ADC) to utilize the generated waveform.

• Avoid exceeding the maximum rated voltage to prevent damage to the module.
• Use a smooth and stable voltage source for Vin to maintain a stable frequency output.
• Shield the module from electromagnetic interference to prevent signal distortion.
• Ensure proper heat dissipation if operating near the upper limit of the voltage range.

• No Output Signal: Check power supply connections and ensure the input voltage is within the specified range. Verify that the control voltage is applied to the Vin pin.
• Unstable Frequency: Ensure that the control voltage source is stable. Use decoupling capacitors near the power supply pins if necessary.
• Distorted Output Waveform: Check for electromagnetic interference or improper grounding. Use shielded cables for connections, especially for the output signal.

• Q: Can the VC-02 Module generate different waveforms?
  • A: Yes, the VC-02 can generate sine, square, and triangle waveforms.
• Q: What is the maximum frequency the VC-02 can produce?
  • A: The typical frequency range is from 100 Hz to 20 kHz, but it may vary slightly depending on the specific module and conditions.
• Q: Is the VC-02 compatible with Arduino UNO?
  • A: Yes, it can be used with an Arduino UNO by connecting the Vcc to 5V, GND to ground, and controlling the Vin pin using a PWM output from the Arduino.

// Example code to control VC-02 Module with Arduino UNO
int controlPin = 3; // PWM output connected to Vin of VC-02

void setup() {
  pinMode(controlPin, OUTPUT);
}

void loop() {
  // Generate a control voltage via PWM to set the frequency of VC-02
  analogWrite(controlPin, 128); // Set to 50% duty cycle for demonstration
  delay(1000); // Wait for 1 second

  // Change the frequency by adjusting the PWM signal
  analogWrite(controlPin, 64); // Set to 25% duty cycle
  delay(1000); // Wait for 1 second
}

Note: The above code is a simple demonstration. The actual frequency control will depend on the specific characteristics of the VC-02 Module and the input voltage applied to the Vin pin. Use a low-pass filter to convert the PWM signal to a DC voltage for finer control over the frequency.