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TIDM-1021: Possibility of liquid tolerance when the TIDM-1021 board is placed horizontally and when it is tilted

Genius 5840 points
Part Number: TIDM-1021

Hello,

I read following thread and document.

https://e2e.ti.com/support/microcontrollers/msp430/f/166/p/791364/2937104#2937104

https://www.ti.com/lit/ug/tidue90/tidue90.pdf

I would like to understand the possibility of liquid tolerance when the TIDM-1021 board is placed horizontally and when it is tilted.

From above information, My understanding is that TIDM-1021 can't be placed horizontally from following reasons.

 1.When TIDM-1021 board is placed horizontally, large water droplet stays if we pour a large water on it.

       Therefore CapTIvate can't detect touch.

 2.When TIDM-1021 board is tilted, water flows continuously if we pour a large water on it.

       Therefoere CapTIvate can detect touch.

But I don't think the situation of 1 and 2 is much different.(Both are covering TIDM-1021 with water)

Could you tell me the details of the mechanism that CapTIvate cannot detect touch in the situation 1?

Regards,

U-SK