Alarm clock from Atmega328 and 7-segment display

Nope. Just had a few demux type chips, 74154 or 74150, that kind of part.
Was all built from scratch using 74xx logic. Maybe 74LS. Point to point soldering on non-copper clad perfboard and PCB mount sockets expoxied in place, or maybe held in place via the decoupling caps. Crude looking wiring job, did the best I could with materials I could scrounge/afford as a poor college kid. My designing/building is way better these days 8)