The voltage to pulse width modulation (PWM) can transform analog voltage into 0-100% PWM duty cycle output. The converted voltage range can be selected (using jumper) either to be from 0 to 5V or 0 to 10V.
The 2SC4835, 2SC-4835, 4835 is a 10V 80mA 150mW Silicon NPN Epitaxial Planer Type For UHF Band Low-Noise Amplification Transistor. Manufactured By NEC Semiconductor.
The TIP32C is a base island technology NPN power transistor in TO-220 plastic package with better performances than the industry standard TIP32C that make this device suitable for audio, power linear and switching applications. The PNP type is TIP31C.
The PAM8403 is an Amplifier Board that can be powered using simple 5V input and could drive two 3W + 3W stereo speakers. It is an excellent choice for, who wants a Class-D stereo audio amplifier in a small board space.