SparkFun Capacitive Touch Breakout - AT42QT1011

The SparkFun Capacitive Touch Breakout provides a single momentary touch button using the AT42QT1011 capacitive sense chip. Simply supply 1.8–5 V and ground — the chip handles all touch monitoring and outputs a digital high signal when a touch is detected, low when released.

Unlike the AT42QT1010, this variant has no internal time-out, meaning the output stays high for as long as a touch is held. A PAD pin is broken out for connecting an external electrode to create custom touch surfaces.

Key Features

• Single Capacitive Touch Button – Momentary digital output (high when touched)
• No Time-Out – Output remains high for the full duration of a touch
• Wide Voltage Range – Operates from 1.8–5 V
• External Electrode Support – PAD pin for custom touch surfaces
• Simple Digital I/O – No library or complex setup required

Specifications

• IC – AT42QT1011
• Operating Voltage – 1.8–5 V
• Output – Digital high (touched) / low (released)
• Time-Out – None (output held indefinitely during touch)

Ideal For

• Button-free user interfaces
• Interactive art and installations
• Proximity-triggered projects (with external electrode modification)
• Arduino and microcontroller input

Package Contents

• 1× SparkFun Capacitive Touch Breakout (AT42QT1011)

Resources

• Hookup Guide
• Schematic (PDF)