The MAX7219 is a IC that can drive 64 LED's, while you only need 4 wires to interface it to a microcontroller. So you can easily hook it to a 8x8 LED matrix module or an 7 segment display. In addition you can daisy chain multiple 7219 chips for more LED displays. The MAX7219 has a 4 wire SPI interface making it very easy to connect it to a microcontroller or a arduino.

 The MAX7219 has 24 pins of which 8 pins control the rows and 8 pins control the colums. The LED matrix display used here is a LuckyLight 8x8 1.2 inch display with an common anode. The color is amber.