Hi ComputerGuru,<p>I guess the main question for me is, what stage are you at? Have you done adequate manufacturing engineering? Worked on the factory contacts? Just getting started on the science? Working on product refinement? A few demos out and helpful?<p>In terms of investors that I know about, both Khosla Ventures and Kleiner Perkins are willing to invest in hardware projects with huge potential: with Khosla Ventures even at the science project stage. Angel investors are also pretty good bets, due to the social good angle.<p>Due to your describing it as 'hacked together,' and the lack of IP protection thus far (you should consider filing for provisional patents ASAP, they're far less expensive), you're probably seed or series A stage for Khosla Ventures, possibly too early for the other VCs that I know about, but potentially you could also raise money from a variety of foundations and from NIH, for example.<p>Good luck! If you'd like to contact me I can be reached at dani.fong at google's mail service.