You can use an RCA cable, a composite cable which will require separate plug-ins for the sound and the video. Or, you can use an adaptor to connect your smartphone to a VGA port (the same kind that you use to connect a monitor to your PC).30 Oct 2019
How do I connect my phone to my RCA projector via USB?
- If your USB device came with a power adapter, plug the device into an electrical outlet.
- Connect the USB cable (or USB flash drive or USB memory card reader) to the projector's USB-A port shown here.
- Connect the other end of the cable (if applicable) to your device.
Can I connect my phone to projector with USB?
Some projectors have a USB port. If you're lucky enough to have this option, though, it's by far the easiest way to connect a phone to your projector. Simply connect a cable to both devices, make sure your projector is set to the correct input channel, and turn them on.19 Aug 2021