This is a master controller board to control many 'clocks' over RS-485 to build a 'MetaClockClock': many analog clocks build a wall of clocks to show information or interesting animation patterns.

You can see how this looks in the following articles:

https://mcuoneclipse.com/2021/01/01/metaclockclock-v4-for-the-year-2021/

https://mcuoneclipse.com/2020/12/26/new-metaclockclock-v3-finished-with-60-clocks/

https://mcuoneclipse.com/2020/06/07/behind-the-canvas-making-of-60-billion-lights/

https://mcuoneclipse.com/2020/05/24/60-billion-lights-2400-rgb-leds-and-120-stepper-motors-hiding-behind-canvas-art/

The board has the following features:

• 6 WS2812B RBG LED Lanes
• Realtime Clock
• Temperature/Humidity sensor
• tinyK22 socket
• RS-485 interface
• 5V power supply input and output (pass-through)
• Optional sockets for BLE (Adafruit SPI friend), ambient light sensor or ESP32

For full project you need:

• 1 master board: https://www.pcbway.com/project/shareproject/MetaClockClock_Master_tinyK22.html
• 1 tinyK22: https://www.pcbway.com/project/shareproject/TinyK22_V1_3.html
• Multiple MCU boards: https://www.pcbway.com/project/shareproject/MetaClockClock_MCU_Board.html
• Multiple Motor Boards: https://www.pcbway.com/project/shareproject/MetaClockClock_Motor_Board__Satellite_.html
• Multiple LED Ring boards: https://www.pcbway.com/project/shareproject/MetaClockClock_LED_Ring.html

How the full project could look like, see

• https://mcuoneclipse.com/2021/01/01/metaclockclock-v4-for-the-year-2021/
• https://mcuoneclipse.com/2020/12/26/new-metaclockclock-v3-finished-with-60-clocks/
• https://mcuoneclipse.com/2020/06/07/behind-the-canvas-making-of-60-billion-lights/
• https://mcuoneclipse.com/2020/05/24/60-billion-lights-2400-rgb-leds-and-120-stepper-motors-hiding-behind-canvas-art/