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Based on the usage of capacitors, condensators. Alternatively, utilizing the derivative of signals.

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Capacitive touchscreen [duplicate]

I am doing project in which I want to perform read and write operation by using a capacitive touchscreen. … What I know is I can trigger capacitive touch screen by: By using electromagnet as I heard that some of stylus works by using magnet at its point so I think electromagnet should work. …
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