Surely creating them from a simple microcontroller will be impossible! Not according to [techtoys], who has created an Arduino shield that creates an HDMI output from an SPI control input.

Over the last decade, the open-source movement has not only transformed the world of software, but also catalyzed a sweeping revolution in hardware tinkering. At the heart of this shift lies a ...

Image by bigthink Via The Hardware Hacker's Introduction to Microcontrollers, Part One: Anatomy of an Arduino on fear-of-lightning.wonderhowto.com.

Intel's Curie-based Arduino 101 Programmable Microcontroller development board goes under the microscope today to see exactly what it brings to the table.

The organization has introduced the Raspberry Pi Pico, a $4 board meant to offer a gentle entry point for microcontrollers. Think of it more as a complement to a Pi aimed at tasks like analog input.

That link also contains listings of workshops using the Shrimp microcontroller. Since it appears just like an Arduino Uno you can do any of the hundreds of projects for that board.