I'm looking to use these $12 HDMI Switchers to switch cam-recorders during a live stream event - they have IR but my attempts to capture IR sound as done in this Hackaday "Metalab Bypasses IR Remote with Audio Circuit" wasn't very successful.
So I unscrewed the case and attached wires to the led's and the switch.
I use the analog pins on an Arduino Nano to read the status of the pin's and a digital pin with a transistor to mimic the button press.
It's a little fidgety on first setup as it can require plugging/unplugging HDMI sources and sometimes turning the cam-recorders on/off. I've also found that it needs it's own power source (they claim it can be powered by the HDMI sources but that doesn't work).Portta PET0501SP HDMI 5x1 5-Port Switch/Switcher with IR Remote, AC Adapter and 3D Support
https://www.amazon.com/gp/product/B00GUDTRVE
C&E HDMI 5x1 5 Port Switch/Switcher with IR Remote Support 3D with Power Adapter
https://www.amazon.com/gp/product/B009EADCXO
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