spi on toorun.devhttps://toorun.dev/tags/spi/Recent content in spi on toorun.devHugo -- gohugo.ioen-usTue, 13 Oct 2026 10:00:00 +0000E-Ink Displays Explained: How They Work, When to Use Them, and an Arduino Examplehttps://toorun.dev/posts/e-ink-displays-explained-arduino-epaper-guide/Tue, 13 Oct 2026 10:00:00 +0000https://toorun.dev/posts/e-ink-displays-explained-arduino-epaper-guide/E-Ink Displays Explained: How They Work, When to Use Them, and an Arduino Example E-ink, also called e-paper, is a reflective display designed to show information clearly without continuously powering a backlight or pixels. It is popular in e-readers, shelf labels, and battery-powered instruments because an image can remain visible after the display has been updated. That makes e-ink a strong choice for mostly static information, but a poor choice for video, animation, or interfaces that must react instantly.