sensor choice

good day,

i looking sensor module project. make a
contactless joystick, i.e. detecting up-down , left-right movements
made hand @ close vicinity of sensor(s), without touching
it/them.
i thought square/diamond configuration (or even
triangle). close vicinity, thinking few cm (1 4 in).

which type of sensor think more appropriate that
kind of project? ir, sonar, hall effect, other?

ir seems interesting fear movement of other parts of body
interfer hand movements. pricewise , sizewise well, ir
seems interesting, although have close no experience other
types of sensors. also, wondering how deal how quit,
i.e.  releasing joystick. final movement may give false positive.

i not sure prices either.  there big difference in using these different sensors?

what recommend?

or perhaps such device exists?  have not found 1 yet, though.
many in advance guidance.
best regards,

 

there not big difference in price of normal sensors.
if want measure ph value of aquarium or dissolved oxygen in water, expensive.

could explain more project is.
with hall sensors magnet needed.
with ir sensors, can contactless.
sonar might work, perhaps single finger small.
radar security systems, , don't know radar sensor short distances.

what mean not touching sensor. applying force problem, or hygiene. should sensor covered can cleaned ?

i start test sonar.

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