Reply To: Lowering the Cost

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#101500
maphew
Participant

I bought 2 pi in the form of Kano Computing kits for my kids. The experience was underwhelming for them. Compared to ipods and laptops etc. it just didn’t grab their attention. Lag was a big part of that. (*I* thought they were cool, but my first computer cost $7k, took 3 years to pay off, and at 50Mhz was full order of magnitude and then some slower.)

Anyway, back to topic: what’s this about fresnel projectors?

Doesn’t take long to find some interesting starting points. Anyone here actually build or use one?

http://hackaday.com/2014/03/13/make-an-hd-projector-for-next-to-nothing/ (mount LCD under old style overhead projector)

http://macgyverisms.wonderhowto.com/how-to/make-diy-home-theater-projector-and-50-screen-for-only-5-great-for-march-madness-0144568/ (put display inside cardboard box, pointed at fresnel lens)

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