maemo.org - Talk - View Single Post - Producing Qwerty OtherHalf --order counter: 75/75 --ordering closed

MartinK	2013-10-08 , 23:08
Posts: 1,548 \| Thanked: 7,510 times \| Joined on Apr 2010 @ Czech Republic	#77

Originally Posted by PamNor

Have you thought about using a NFC chip as an sliding switch. When sliding out the keyboard, the distance between the chip and the NFC receiver is to big to detect the NFC chip.

Well, even a modified passive NFC tag might do.

You could place a relay in it's antenna circuit, so that the circuit would be closed on only when the keyboard is open.

Or possibly even a simpler solution - place a passive NFC tag on the sliding OH part in such a way, that in one position it would be found by the on-device NFC antenna and in another not.

Still the question is - if it polling would be required or if there are is some low power NFC standby mode that might send interrupts once a NFC tag is found.

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