Grove-Q Touch Sensor Release date： 9/20/2015 Version： 1.0 Wiki: http://www.seeedstudio.com/wiki/Grove_-_Q_Touch_Sensor Bazaar: http://www.seeedstudio.com/depot/GroveQ-Touch-Sensor-p-1854.
Document Revision History Revision Date Author Description 1.0 Sep 21, 2015 Victor.
Contents Document Revision History ···································································································2 1. Introduction ···················································································································2 2. Specification ···················································································································3 3.
Disclaimer For physical injuries and possessions loss caused by those reasons which are not related to product quality, such as operating without following manual guide, natural disasters or force majeure, we take no responsibility for that. Under the supervision of Seeed Technology Inc., this manual has been compiled and published which covered the latest product description and specification. The content of this manual is subject to change without notice.
1. Introduction The Q Touch Sensor is a high sensitivity and high noise immunity touch input device. It is based on Atmel AT42QT1070. The AT42QT1070 modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise, and to suppress RF emissions. The QT1070 uses a dual-pulse method of acquisition. This provides greater noise immunity and eliminates the need for external sampling capacitors, allowing touch sensing using a single pin.
2. Specification Operating Voltage: 3 ~ 5.5V Operating Current 1mA for 3.
3. Interface function ①：On board touch key0 ②：On board touch key1 ③：On board touch key2 ④：Touch key0 ~ key6 break out The recommended range for key capacitance Cx is 1 pF – 30 pF. Larger values of Cx will give reduced sensitivity.
4. Usage Demo: Who touched my lychee? Have you ever heard of a lychee? Yes, it's a very famous fruit of south of China. If you have ever tasted, will love it. Now let's begin our demo. When you touch the hit pan (lychee), the LED will turn on. 4.1 Hardware Connections 1. Connect the I2C of Grove-Q Touch Sensor to the I2C socket on the Grove Base Shield. 2. Connect the Grove-LED to D3 (Digital Pin 3) on the Grove Base Shield. 3.
5. Software Part 1) Download the library [Q Touch Library]; 2) Unzip it into the libraries folder of Arduino IDE, for example the path could be ..\arduino1.0.5\libraries. Example 1: a) Open the example via Arduino Menu 'File -> Examples -> Seeed_QTouch-master -> isTouch'. b) Upload the code. Note that you should select the correct board type and COM port. c) On touching the Lychee, the LED would glow, as can be seen below.
Example 2: a) Open the example via Arduino Menu 'File > Examples > Seeed_QTouch-master -> Grove_QTouch_demoCode....’ b) Upload the code. c) Open the Serial Monitor. d) Touch and release the Lychee; The Serial Monitor would display the duration of touch as in the screenshot below. Example 3: a) Open the example via Arduino Menu File > Examples > Seeed_QTouch-master > getTouchNumber b) Upload the code. c) Open the Serial Monitor.
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