Non-toxic and cheap thin-film solar cells for 'zero-energy' buildings
    The Papp Engine - Update on John Rohner.

    Its time for the pulse motor build off 2016. I highly recommend this having been a former judge. It more about an exercise in the imagination, being resourceful and in some cases engineering skills. The video tells the story.

    I like the catch phrase “Competition through Cooperation

    Non-toxic and cheap thin-film solar cells for 'zero-energy' buildings
    The Papp Engine - Update on John Rohner.
    Twitter Auto Publish Powered By : XYZScripts.com