Of the boards examined, six of them have OLED displays, but one has an E-paper display. To summarize results, [Andreas] summarized his findings on these seven along with others in an online ...

The data is then converted to RPM and displayed on a small OLED display. [publidave] does an excellent job of describing what exactly he did, highlighting the problems he encountered, and how he ...

As Hackaday revealed, this one comes with an E Ink display, a secondary OLED panel, and a keypad made of soft silicon that is encased within a see-through case.