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  1. Best Way to Activate a Touch Switch Without Touching It

    Apr 17, 2024 · Hello there, I'd like to activate a touch switch electronically. It's a capacitive type switch. There can be no wires connected to the capacitive switch, it must come from something completely …

  2. Capacitive touch trigger as an isolated system - All About Circuits

    Jun 2, 2019 · I need a way to trigger a capacitive touch screen device (like a tablet) using an isolated system without touching it. For example a kid places a small gadget on a tablet screen and the …

  3. Capacitive Speakers - All About Circuits

    Jul 20, 2022 · The capacitive value of the speaker is an important characteristic for the amplifier circuit of the speaker. “Piezoelectric means capacitive load” Most amplifier IC’s are developed for …

  4. How to operate a capacitive touch switch using relay contacts.

    Oct 12, 2023 · FTC334F is a professional capacitive touch button processing chip. It adopts the latest high-precision digital capacitance measurement technology and can prevent various interferences, …

  5. Impedance Calculation - All About Circuits

    Feb 14, 2024 · They have defined capacitive reactance as 1/ (2πfC) and inductive reactance as 2πfL, both of which are positive quantities (for positive frequencies and component values). They have …

  6. Resistive vs Capacitive vs Other? - All About Circuits

    Jan 6, 2016 · The capacitive humidity sensors I played with a long time ago used a thin plastic sheet that changes thickness with changes in humidity. The surfaces of the plastic were metalized to make …

  7. Capacitance to Voltage Converter - All About Circuits

    Sep 19, 2014 · Hi all i am working on a project where i have to convert capacitive sensor output to a voltage signal.i know there are several methods to do it but as per my sensors specification i could …

  8. Morse Keyer Project - All About Circuits

    Jul 7, 2010 · As for the capacitive touch circuit, I remember reading a QST article of a guy who designed a Morse Code Keyer with capacitive initiation (it had everything you described). I'm not sure whether …

  9. SPI Communication - All About Circuits

    Jan 26, 2022 · Hi all, In general, Shall we connect the transceiver pins to SPI as shown below?. SPI_MISO to RXD_P (and RXD_N to GND), and SPI_MOSI to TXD_P (and TXD_N to GND).

  10. negative capacitance - All About Circuits

    Mar 30, 2004 · If you set your meter to measure inductance, but the measurement frequency is above the resonance, then the component will become capacitive, and will show as a negative inductance, …