Browsing websites like Aliexpress, it is very easy to find a ton of very cheap, small class-D amplifiers with good power ratings - from sub 0.50€, 3W-capable boards based on a PAM8403 IC, to 500W ...

The Arduino Mini Amplifier is a complete, open-source audio amplifier system that combines vintage analog audio processing with modern embedded control. It features Bluetooth and line-in audio inputs, ...

The FM receiver module is based on the TEA5767 [1, 2] chip. It is a well-known module that could be controlled via the I2C bus. It covers the FM frequency range from 76MHz to 108MHz. At the output, it ...

A DC motor can be switched ON and OFF using this amplifier circuit while being able to regulate its spinning speed with a PWM source generator. The circuit is using the pin 9, 10, and 11 from the ...