Thinking aloud. You can easily use very high impedance sensors that that can be made with a simple CMOS gate or two and some 1 to 10 Meg resistors. So a hex inverter could be used to both make the input of a sensor and say a monostable to give a 'clean' buffered output. A label button could offer a high frequency source an next to zero current that could be gated by a data stream, more CMOS.
I think more info is required. I have to agree with other posts regarding graduation projects and safety.
I understand that Texas is keen on such development although they have not been very successful to date.... depending how you measure success.