7 segments display are fun. But each display would need 7 connections, one for each segment and also the ground pin. Also, showing numbers one by one is quite difficult. That's why we use some special ICs to control the segments.
YouTube channel posted his work on some adressable 7 segments modules. This tiny PCBs are usign 7-segments drivers to control the LEDs and display numbers or letters. And even more, the data from the first chip could go to the next and by taht create a string of numbers uisng multiple modules in series. And we can communicate with all at once using just the serial data pins.
To order your boards, use PCBWAY.com
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