How do you connect rear projector tv to modern day HDMI?

To connect a rear projector TV to modern HDMI sources, you'll need an HDMI to VGA or HDMI to composite adapter, depending on the input options available on your projector. First, connect the HDMI output from your device (like a streaming box or laptop) to the adapter. Then, connect the adapter to the projector using the appropriate cable (VGA or composite). Ensure that both the projector and the source device are powered on, and select the correct input source on the projector.