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.

The project builds on earlier work that saw the RP2040 outputting digital ... the microcontroller here, but it’s still fun to think of such a humble chip doing such heavy-duty video output.

A microcontroller is essentially ... The MSPM0C1104 will feature “a 12-bit analog-to-digital converter with three channels; ...

Texas Instruments (TI) unveiled what it claims to be “the world's smallest microcontroller ... bit analog-to-digital ...