MAX7219 8x32 4 in 1 Dot Matrix LED Anzeigemodul kompatibel mit Arduino und Raspberry Pi Select quantity discount:3x LED Matrix the application is particularly convenient

the application is particularly convenient due to a universal interface and widespread libraries for Raspberry & Co

If that's not enough

A passive bookshelf loudspeaker (unfortunately usually only available in a double pack) / any loudspeaker

The relays are commonly used in remote control

vorgefrästes 6 TE Hutschienengehäuse mit transparentem Oberteil

MAX7219 8x32 4 in 1 Dot Matrix LED Anzeigemodul kompatibel mit Arduino und Raspberry Pi Select quantity discount:3x LED Matrix the application is particularly convenientHighly scalable from a single 64 LED panel to a small LED wall, the bright red modules are suitable for displays with long distance effects. The AZDelivery LED matrix with 256 LEDs consumes a maximum of only 160 mA, so that it can be conveniently operated without an additional energy source, e. g. via a microcontroller. The MAX7219 LED drivers are controlled via SPI data protocol using only 5 cables even if you connect several modules together.