Stereo power amp ES-4. Provides maximum power per channel of 15W R.M.S at 4 ohms. Due to its power and quality, it is recommended for portable CD players, Walkmans, buses, home audio, p.a. systems, etc.
The Arduino Mega 2560 is a microcontroller board based on the ATmega2560. It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs and 4 UARTs (hardware serial ports).