There are a few extra pins you will see in a HDMI connector pinout. These are way more fun than you might know of, and I’m not even talking about the I2C as some might guess. For a start ...

HDMI, on the other hand, carries both video and audio signals through a single cable — and, in some cases, Ethernet — using multiple pins at each end, streamlining the mess of cables you may ...

The first is the mini-HDMI, or Type-C. This is about half the size but still has all the 19 pins, though some of them have their uses swapped. It’s seen on the side of DSLRs and mirrorless cameras.

As [Mike] points out, this requires a lot of IO pins, and many development boards only support 8 bit VGA. Analog VGA is being replaced with DVI-D and HDMI on many devices nowadays, so it would be ...