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. 2022 May 19;9(5):218. doi: 10.3390/bioengineering9050218

Figure 9.

Figure 9

The testbench hardware: (a) An Arduino DUE microcontroller board together with a custom-made electronic board holding the chip; (b) The chip; (c) The microscopic image of the two electrodes and the surrounding encapsulation layer with a hole for the non-passivated sensing electrodes.