Arduino-Based Frequency Generator

The Arduino-Based Frequency Generator uses an Arduino Uno board as the core processing and signal-generation unit to produce basic waveforms such as sine, square, and ramp within the audio frequency range. The system is powered either through a USB cable or a 9V adaptor/battery, supplying stable voltage to the microcontroller and peripheral hardware. User interaction is managed using two 10-kilo-ohm potentiometers, designated as VR1 and VR2, which allow the operator to adjust parameters like frequency and amplitude by varying analog input voltages read by the Arduino's analog pins. Control inputs are further supplemented by switches S1 and S2, enabling mode selection or parameter toggling. Visual feedback is provided by a 16x2 LCD connected via a 16-pin Berg strip, displaying current settings, waveform types, and frequency values in real time. To ensure clean signal output, the circuit incorporates a 470-ohm resistor (R1) alongside dedicated resistor-capacitor filter components to smooth out the generated signals and reduce high-frequency noise. All components are integrated onto a custom PCB for reliable physical connections and stable operation.