This DIY Outdoor Movie Theatre uses a small projector and a GoalZero solar powered generator to power it and the laptop.
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link to the projector we used: https://amzn.to/2JBhE8n
link to the GoalZero Yeti 400: https://amzn.to/2HE8kQK
link to GoalZero products: https://www.goalzero.com/
We built the projection screen out of a 3 foot by 5 foot piece of concrete backboard using 2x4s for supports. we got all the materials from Home Depot.