Class D stereo sound amplifier based on the Texas Instruments TPA2016D2 circuit. It can work with 4 Ω speakers with power up to 2.8 W or 8 Ω with power up to 1.7 W in stereo mode. SparkFun DEV-20690

Audio module with DAC, headphone amplifier and display, designed to work with the Raspberry Pi. It is based on the PCM5100A system and communicates via the I2S interface. Pimoroni PIM482

BOB-11044 OSHWTPA2005D1 class D audio amplifier module. The chip can work with a loudspeaker up to 1.4 W and 8 Ohm. SparkFun BOB-1104

LM386 audio amplifier module. It is supplied with the voltage ranging from 4 to 12 V. The set includes an 8 Ω, 0.5 W loudspeaker. DFRobot DFR0064

Audio module with DAC, stereo amplifier and display, designed to work with the Raspberry Pi. Pimoroni PIM484

Audio module with DAC converter and mono amplifier, designed to work with the Raspberry Pi. Pimoroni PIM541

PAM8302 Class D mono digital audio amplifier module. The system allows you to connect one loudspeaker with an impedance of 4 to 8 Ω and a power of 2.5 W. The board is equipped with a STEMMA connector. Adafruit 5647

A new version of the popular mono amplifier kit, capable of amplifying audio from any source, such as MP3 players, using the NCP2890 with an output power of up to 1 W. The kit comes pre-assembled, including a jack cable, 8Ω speaker, and a battery holder for two AA batteries, allowing for quick start-up and ideal for portable DIY audio projects. Kitronik 2165B

Class-D mono audio amplifier module based on the MAX98357 chip. It can work with a 4 to 8 ohm speaker of up to 2.5 W and communicates via an I2S interface. DFRobot DFR0954

The module with the MCP9600 amplifier is designed to work with the thermocouple type K, J, T, N, S, E, B and R. It has a screw connection and communicates via the I2C interface. Pimoroni PIM437

The module with the MAX31850K amplifier is designed to work with a thermocouple. The board is equipped with a Grove connector and communicates via 1-Wire. Seeed Studio 101020555

Module with class D mono audio amplifier designed for QT Py and Xiao boards. It is based on the MAX98357 system and can work with a loudspeaker from 4 to 8 Ω with a power of up to 3 W. It communicates via the I2S interface. Adafruit 5770