You need someone with hardware prototyping skills. You can either get an unpaid cofounder, or pay someone to do it (and worry about getting a hardware cofounder later). For either of those options, you'll need someone local. Look in local hackerspaces (https://wiki.hackerspaces.org/List_of_Hacker_Spaces), electronics / robotics meetups (Meetup.com), or contact relevant departments at local universities. If you're in NYC send me a message and I'll hook you up.

Once you've got a working, proven prototype and want to get investment and get ready for larger scale manufacturing, I'd recommend these guys that combine the two nicely: https://www.bolt.io/pitch

If you'd like to discuss next steps more specifically related to your particular idea let me know,

best,

Lee