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

[Xark] grabbed an Arduino, an LCD, and an Open Workbench Logic Sniffer to see where the inefficiencies in the Adafruit library were. These displays are driven via SPI, where the clock signal goes ...