AT42QT101X Capacitive Touch Breakout Hookup Guide

Contributors: Elias The Sparkiest, Shawn Hymel
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Hardware Hookup


If you are not planning to mount the board flush to a panel, you can solder either wires or break away headers to the 4 header holes on the board.

Vertical PTH headers on AT42QT1011 breakout

PTH headers are recommended if you are using a breadboard.

On the other hand, if you wish to mount the AT42QT101X to a panel, you can solder a 4-pin male header to the SMD pads.

SMD Headers on AT42QT1011

SMD headers work better if you plan to mount the board to a panel

Connecting the AT42QT101X Breakout Board

Hookup Guide of Arduino to Capactive Touch Breakout

Basic hookup using an Arduino and a breadboard

For an Arduino, make the following connections with jumper wires:

AT42QT101X Arduino

Mounting the AT42QT101X Breakout Board

One advantage of capacitive touch boards is their ability to be mounted to panels and detect touch through thin plastic, cardboard, etc. Using a drill or laser cutter, cut four 0.125 inch holes in the same pattern as the mounting holes on the breakout board.

Attach the board to the panel using #4-40 screws and #4-40 nuts.

Capacitive Touch through Breakout!

The AT42QT101X will detect touch through 0.125 inch acrylic

External Electrode

You can create your own electrode by using foil, copper tape, or any other conductive material. Cut or shape the electrode and attach a wire between the electrode and the PAD pin on the AT42QT101X breakout board. For a secure connection, make sure to solder the external electrode together. The electrode can be almost any shape and size.

External Pad

Touch can be detected on external electrodes