we're looking into building an example augemented reality projector project. We found this projector on amazon:
and bought one. you can plug it straight into a raspberry pi or anything with HDMI and power it over USB. We're using it for prototyping. The light is a bit weak and can only really be used for inside work (in darkened rooms). But it's light and easy to use. If you want more power, you're going to have larger batteries.
2017-03-27 09:16:03 UTC WeepingAngel - 44 points
Use a magnifying glass in front of your phone screen and adjust it to the focal point in the dark room.It will project your screen on the wall. close everything in a box with only glass as opening for better quality.
2017-08-21 06:38:23 UTC Shanque - 141 points