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Capacitive Sensor Board - AD7746 Breakout

Replacement:SEN-10250. We now carry the MPR121 capacitive touch sensor. This page is for reference only.

Breakout board for the Analog Devices 7746 capacitance sensor. Configured for two channels of single-ended capacitance input. Comes with an example touch sensor as well as long capacitance creating traces. Useful as a complete I2C interfaced touch sensor, or as a capacitance measuring tool.

  • 2.2" x 0.75"


Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • giantsfan3 / about 10 years ago / 1

    Even though this product has been retired, would you please be able to put up the Eagle board layout or Gerber files for this? I am having a bit of trouble creating the touch sensor portion using Eagle.

  • davev / about 13 years ago / 1

    This chip is better suited as a capacitance sensor, not a plug and play capacitive touch button. If you want to integrate a capacitive touch button into a project, id recommend the "MPR121 Capacitive Touch Sensor Breakout Board" which has touch recognition built into the chip.
    This chip requires you to write your own touch recognition algorithm.

  • MisterFuzzy / about 13 years ago / 1

    Does the rotary sensor break away from the rest of the board??? And can I place plastic in front of it to hide it, and still have it run correctly?

  • aalias / about 14 years ago / 1

    Thanks for this breakout board!
    And thanks to MarcusInteractive-Matter for doing major part of the leg-work in accessing the chip by putting his Arduino code on the web.
    So, how about upgrading this breakout board to allow for differential capacitance sensing (like using both Cin+ and Cin- pins for each channel)?
    It will make this board even more versatile...

  • MarcusInteractive-Matter / about 14 years ago / 1

    If you want to hook this baby up with arduino expect some tricky issues. Check my Capacitive Sensing Guide for AD7746 & Arduino

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