This RGB LED Matrix system can be used for billboard displays on the windows or sides of commercial buildings. A great advantage of this system is that after installation, light can still shine through between the translucent LED strips.

Features:

• It runs on a Pi 3B and RGB matrix HAT system
• Can be upgraded to a Pi 4B system
• RGB LED power output connector
  
• i2c DS1307 Real Time Clock (RTC) with a CR1220 backup battery
• WS2812 RGB LED output connector that can choose between using GPIO18/SPI signal

• APA102/SK9822 LED output connector
• 3.3V power regulator for 3.3V devices
• Logic level converter for APA102/WS2812 LEDs
• 5x GPIO key inputs
• 1x GPIO green LED output
• i2c 128x64 OLED screen
• i2c bus 1 EEPROM for customisable functions

Technical specifications:

• Raspberry Pi HAT: i2c bus 0 HAT EEPROM
• 5cm x 5cm DC fan in the 3D-printed PLA case
• 1 LED Matrix module: 16x26 = 416 pixels (32cm x 50cm)

12 pieces with 26x16 LED modules each:

104x48= 4992 pixels (200cm x 96cm) [Heart-Eyes emoji]

12 pieces with 26x16 LED modules each:

104x48= 4992 pixels (200cm x 96cm) [Raspberry Pi logo]