This 7-Segment module has 8 displays, works on 3.3V and 5V and can be fully controlled with only 4 wires. This module is controlled by the MAX7219 chip. This chip is specialized in controlling 'common-cathode' displays with serial input as commands. This allows the displays to be individually adjusted, eliminating the need for the microprocessor to update all displays with a single change. In addition, this module has 4 holes in the corners for easy installation. https://elecena.pl/product/27738375/opencircuit-8x-7-segment-module-serial 2025-01-22 https://elecena.pl/product/27738375/opencircuit-8x-7-segment-module-serial 2025-03-22 https://elecena.pl/product/27738375/opencircuit-8x-7-segment-module-serial 2025-04-20 https://elecena.pl/product/27738375/opencircuit-8x-7-segment-module-serial 2026-04-14