Function generator is one of the most important equipment in electronics testing. However its cost can be quite prohibitive. In this work we will study how to transform a square wave generated by Arduino into a sine wave by using filter/amplifier based on 2N3055, thus enabling low-cost high-power function generator. Said function generator will be shown to be capable of producing sine wave with frequency between 500Hz-10KHz. With proper tuning it is capable of achieving up to 0.6% accuracy within the desired value.
Development of Low-Cost High-Power Sinusoidal Function Generator for Driving a Single Tone Wave into Speaker using Arduino Uno and 2N3055