E3B Atmel, E3B Datasheet

E3B

Manufacturer Part Number

E3B

Description

BOARD EVAL FOR QT310 & QT320

Manufacturer

Atmel

Series

Quantumr

Type

Capacitive Touch and Proximity Sensorr

Datasheet

1.E3B.pdf (2 pages)

Specifications of E3B

Rohs Status

RoHS non-compliant

Contents

Evaluation Board

For Use With/related Products

QT310, QT320

Other names

427-1056

Current page: 1 of 2
Download datasheet (212Kb)

Quantum Research Group Ltd.

US: +1 (412) 391-7367

Fast Start

Overview

The E3B eval board works with

Quantum’s QT31x and QT32x

QTouch ICs. Either type of device

can be inserted into the 8-pin DIP

socket.

QT31x - single-channel devices

use the QTouch-1 sense pad.

QT32x - two-channel devices use

both the QTouch-1 and QTouch-2

sense pads.

Both series of devices use the

header strip for feature cloning of

setups or uploading and download-

ing of information to and from a

host such as a PC. The board and these two series of devices are compatible with

QT3View windows software.

For detailed information about the ICs for this board please refer to the QT310

and QT320 datasheets (or datasheets for future devices in these series).

To begin using the board right away:

If you are touching on or around the touch pads when you turn the switch on, it will

calibrate to ignore your fingers. If this happens, take your fingers away and cycle the

power switch again.

Because of Kirchoff's Current Law ("all currents must return to their origin", which also

applies to capacitive fields), the sensor is less sensitive if you are not holding it or if

the board's ground is not electrically coupled to something else. Thus, placing the

board on your desk will result in less sensitivity than if you hold it by the batteries or

connect the board's ground to something larger (or to earth ground).

Unstable operation will occur if you simply place the board on a desktop and try it,

unless rubber feet are used. The board will rock when touched leading to strong varia-

tions in background signals which will affect operation. Make sure the board is firm

and cannot rock, even by a slight amount.

An external piece of metal foil or a wire loop can be connected to the board and

attached to the rear of a surface of your choice (plastic, glass, wood, or stone will all

work fine) to create fully self-calibrating touch buttons (be sure to connect the board's

ground to something else for best results - or, power from an external power supply.

External power - please note! When using external power, limit the voltage to 5v

DC max, using the marked connection points. Be sure to remove the batteries first, or

you may cause an explosion or leakage hazard as the batteries will try to charge up

from the external supply!

1. Insert 2 AAA alkaline batteries into the battery holders. Make sure the small

2. Hold the board in one hand on the battery side of the board, keeping your fingers

3. Turn on the power switch.

4. Touch either 'QTouch' pad area (QT320) or the QTouch-1 pad (QT310). The

power switch is ‘off’.

away from the QTouch pad areas, and generally the entire lower right quadrant of

the board on either surface to prevent the IC from calibrating to your fingertips.

corresponding LED will change state when touched, in a way that depends on

how the chip was setup using the cloning adaptor (see factory defaults).

UK: +44 (0)23 8045 3934

www.qprox.com

for use with the QT310 and QT320 family

QProx is a trademark of QRG Ltd.

E3B USER'S GUIDE

techsupport@qprox.com

R1.0 03/02

Related parts for E3B

E3B Summary of contents

Page 1

... The E3B eval board works with Overview Quantum’s QT31x and QT32x QTouch ICs. Either type of device can be inserted into the 8-pin DIP socket. QT31x - single-channel devices use the QTouch-1 sense pad. QT32x - two-channel devices use both the QTouch-1 and QTouch-2 sense pads ...

Page 2

Batteries Board Use 2x AAA alkaline batteries for best performance. External power may be used if the Details batteries are removed. Power consumption depends on the operating mode chosen. Power Connections The provided connection points (+PWR, GND) can be used ...

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