Strongly recommended · for some experience
Designing a 7-segment hex decoder
Why people recommend it
Ben Eater builds the logic that turns a 4-bit value into seven-segment digits using plain gates, praised as a clear introduction to combinational design.
Watch for: A follow-up does the same job with an EEPROM
In their words
This is a great video tutorial on how to do it and its mechanics.
Ronan Paixão on electronics.stackexchange.com, Jan 2018. CC BY-SA.
Perhaps then I should have just posted this link [video] and said that the circuit you requested is at 12 minutes in and his TTL implementation is shown 30 seconds later.
Lurker Larry on electronics.stackexchange.com, Jan 2018. CC BY-SA.
Ben Eater's YouTube video here and the one following it describe how to do this
Keith Miller on electronics.stackexchange.com, Mar 2020. CC BY-SA.