This adapter board allows you to use AB Electronics' range of Raspberry Pi boards with the Arduino Uno, Genuino UNO and other Arduino boards which use the same pin layout as the Uno design.
The Arduino Nano 33 IoT is the easiest and cheapest point of entry to enhance existing devices (and creating new ones) to be part of the IoT and designing pico-network applications.
The MKR Zero board is a great board for getting started with various music projects. Using the popular Arm® Cortex®-M0 32-bit SAMD21 processor, it also comes with a micro SD card holder with dedicated SPI interfaces.
The Arduino 4 Relays Shield is a solution for driving high power loads that cannot be controlled by Arduino's digital IOs, due to the current and voltage limits of the controller.