While the SSD1306 OLED has somewhat become the go-to display for up-to-date ... which is what [oldmaninSC] did with his digital clock that takes an entire 16×2 LCD to show each single digit.

After building a couple of more traditional clocks over the years, he set his sights on making a completely isolated digital clock ... An ATmega328 drives the display and does other bookkeeping ...