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Licking this "lollipop" will let you taste virtual flavors
It produces nine flavors: Sugar, salt, citric acid, cherry, passion fruit, green tea, milk, durian, and grapefruit.
So Yiming Liu of City University of Hong Kong and co-authors opted to work with iontophoresis, in which stable taste feedback is achieved by using ions flowing through biologically safe hydrogels to transport flavor chemicals. The gels were made out of agarose mixed with a bit of mineral water and specific flavor essences: sugar, salt, citric acid, cherry, milk, green tea, passion fruit, durian, and grapefruit. System components included a lithium-ion battery, a microcontroller, Bluetooth module, resistors, capacitors, N-type and P-type MOSFETs, and linear regulators for wirelessly controlling the flavor channels via a graphical user interface (GUI) in the virtual environment.
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