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> Can it be made for less?

Would you be able to use the LEDs as light sensors and eliminate the switch component entirely? Maybe a tubular shield over each LED so it doesn't interact with others around it then covering it with your finger could be read as toggling the state?

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The rest of your hand is not transparent and will cover a lot of other buttons while you’re only trying to push one.

I'd assume you could detect a difference between a completely/nearly completely covered LED shield and one with a large gap between your hand at the top of the shield.

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