[Joshua Woehlke] wanted to add a similar display to his 486 ... to hold a common 0.96″ SSD1306 OLED. From there it was just a matter of wiring it up to an Arduino and writing some code to ...

Small I2C OLED displays are common nowadays ... It’s unable to write text, but it can easily handle drawing graphs plotting things like values over time while needing very little overhead.