Hi, I'm electronic engineer consultant
Now, I work on similar product, this one detect the angle (via sensor fusion) between moving iron bar and the horizon (ground), and when it is at the programmable angle range, it activate an others system(also I work on).
For this particular application, I can do it without problem as it is the same system method and component that will make sound at 0° from ground.
For the size it can be 5 cm x 3 cm (we can reduce it more if needed)
For my application I don't use a charging system, but there is an already one to be used with USB
What I need to know is:
-- Technical part:
Do you use already Microcontroller or processor ?
It is the main functionality of this gadget?
-- Commercial part:
At first, you need only a first prototype? or only the feasibility and specification one?
After validating this one, do you want a industrialization of the product? here we have a low cost and export free zone capability near to europe.
What is the expected price at production?
For our working methods, we first make a demo/trail product completely at our charge, and send to you with trial system (3 day of full function). if the product fulfill your requirement then we can pay us for the this prototype, or full schematic and software and hardware or if you want a long term involvement with NDA for industrialization.
feel free for any additional information,
We hope helping you.