SEN-14520: Single-Button Capacitive Touch Breakout Board

Summary

If you need to add user input without using a button, then a capacitive touch interface might be the answer. The AT42QT1011 SparkFun Capacitive Touch Breakout offers a single, momentary capacitive touch button with easy-to-use digital I/O pins.

The AT42QT1011 is a dedicated, single-button capacitive sense chip. The chip handles monitoring a conductive area for touch. As long as a touch (e.g., from a finger) is detected, the AT42QT1011 keeps the output line high. Otherwise, the line is kept low. You just need to provide a power source (1.8V-5V) and ground for the AT42QT1011 to work. Additionally, a PAD pin is available if you would like to create your own external electrode.

The AT42QT1011 does not have an internal time-out, meaning that if you hold your finger to the breakout's pad for any length of time, it will stay on as long as the pad is able to sense your finger.

Specifications

Manufacturer	SparkFun Electronics
Category	Sensor Solutions
Sub-Category	Capacitive Sensing
Eval Board Part Number	1568-14520-ND
Eval Board Supplier	SparkFun Electronics
Eval Board	Normally In Stock
Number & Type of Sensors	1 Button
Features	Power Save Mode
Application / Target Market	Handheld games HMI Interfaces White Goods
Component Count + Extras	4 + 5
Design Author	SparkFun Electronics
Voltage In	1.8 ~ 5 V
Sleep Mode Current [Maximum]	75 µA
Main I.C. Base Part	AT42QT1011
Quiescent Current [Maximum]	750 µA
Sleep Mode Current [Typical]	15 µA
Quiescent Current [Typical]	200 µA
Date Created By Author	2018-01
Date Added To Library	2018-05