Stereo AF Amplifier Using TDA1517

This stereo audio frequency amplifier project is centered around the TDA1517 integrated circuit, which serves as a dual-channel audio power amplifier capable of driving stereo speakers. Audio signals enter the circuit and pass through 10k potentiometers (VR1 and VR2), which function as volume controls by adjusting the amplitude of the input signal sent to each channel of the IC. Coupling capacitors like the 220nF units (C1 and C2) are placed in the signal path to block unwanted DC voltage components while allowing AC audio frequencies to pass freely into the amplifier stages. Powering the system is a 14.4V regulated power supply, stabilized by larger 1000µF 35V electrolytic capacitors (C5 and C6) that help smooth out supply voltage ripples and provide instantaneous current reserves for dynamic bass peaks. The amplified output signals are then driven directly into two 4-ohm 6W speakers (LS1 and LS2). Because the TDA1517 IC handles significant power amplification and generates internal heat during operation, it is mounted onto an aluminium heat-sink to dissipate thermal energy effectively. The entire circuit can be assembled on a Veroboard or custom PCB, with terminal connectors providing secure hookups for power, inputs, and speakers, ensuring a reliable physical build for undergraduate engineering evaluation.